Abstract
Introduction
Despite the increased use of telehealth interventions, low-level evidence supports their use for behavior change and self-management in stroke secondary prevention. Therefore, this overview of systematic reviews (SRs) critically appraises and consolidates the evidence about theoretically-informed telehealth interventions in stroke secondary prevention.
Methods
Two phases were conducted independently by two reviewers. Phase-1 included SRs contemplating randomized controlled trials (RCTs) implementing telehealth interventions with individuals post-stroke, targeting cardiovascular events, risk-reducing health behaviors or physiological risk factors. Phase-2 interrogated RCTs from these SRs that implemented theoretically-informed interventions. Best-evidence synthesis of published meta-analyses and new meta-analyses of theoretically-informed interventions were conducted. GRADE evidence was applied.
Results
In Phase-1 (15 SRs), best-evidence synthesis identified telehealth interventions as effective in reducing recurrent angina and recurrent stroke rates (both with very low GRADE), improving medication adherence (low GRADE), physical activity participation (very low GRADE), and blood pressure targets (very low GRADE), reducing systolic blood pressure (SBP) (moderate GRADE) and low-density lipoprotein levels (very low GRADE). In Phase-2
Discussion
Telehealth demonstrates utility in stroke secondary prevention, notably in SBP reduction. High-quality RCTs are required given the lack of current evidence supporting theoretically-informed telehealth interventions addressing primary outcomes of secondary prevention, and the low certainty evidence identified for health behavior change.
Introduction
Stroke has a high burden worldwide and is the third leading cause of death and disability combined.1,2 Recurrent stroke contributes to the high burden of this disease, where recurrence rates vary between 7.7% and 39.7% from three months to 12 years after a first stroke. 3 Recurrent strokes are associated with greater functional disability than first stroke episodes4,5 and are considered a leading cause of hospital readmissions during the first year post-stroke. 6 Consequently, stroke secondary prevention has been identified as one of the top 10 priority research areas to reduce stroke burden by individuals post-stroke and other key stakeholders. 7
Stroke secondary prevention based on non-surgical and non-pharmacological (e.g., behavioral) interventions comprises the use of theoretically-informed interventions to address and self-manage lifestyle-related risk factors, contextualized and individualized to the needs of individuals post-stroke and their families. 8 While stroke secondary prevention guidelines recommend the use of behavior change and self-management interventions to promote a healthy lifestyle including healthy eating, physical activity, cessation of smoking, safe alcohol consumption, and management of psychosocial stress, recommendations are often drawn from primary prevention study evidence.9–11 Better evidence supporting interventions delivered post-stroke is therefore required. 10
Theoretically-informed behavioral interventions to self-manage lifestyle-related risk factors post-stroke 8 can be provided remotely through telehealth. 9 Telehealth refers to the provision of health care services using information and communication technologies (e.g., cellphones and internet) where patients and providers are separated by distance. 12 Telehealth interventions are becoming more frequent in health service delivery and were widely adopted during the Coronavirus pandemic.13,14 There is evidence by meta-analysis that their use in clinical populations is at least as good as usual care, 15 alongside a growing body of research in stroke care.16,17 However, an updated practice guideline for stroke secondary prevention pointed that telehealth use in practice is yet supported by limited research evidence and low level evidence such as professional consensus.9,18 Therefore, better evidence supporting the effectiveness of theoretically-informed telehealth interventions in stroke secondary prevention is required.
In recent years, systematic reviews (SRs) of telehealth interventions targeting stroke secondary prevention outcomes have been published.19–21 However, some specifically addressed one outcome (e.g., medication adherence)19,22,23 while others did not specify stroke populations (e.g., included individuals with arterial occlusive events or cardiovascular disease).19,20 These methodological differences do not allow consolidated evidence about the effectiveness of telehealth interventions for stroke secondary prevention outcomes to be determined. The purpose of this overview, therefore, was to critically appraise and consolidate evidence from existing SRs on the effectiveness of behavior change and self-management telehealth interventions delivered to individuals for the purposes of reducing risk of recurrent stroke and to provide new synthesis from primary studies that were clearly informed by behavior change theory and/or techniques, as per best-practice recommendations.
Methods
Design and registration
An overview of SRs was conducted following the Cochrane Guidelines for Overviews of Reviews 24 and adhering to the preferred reporting guideline for overviews of reviews of healthcare interventions (PRIOR) statement (checklist available in Supplementary Files). 25 This overview involved two phases: identification, screening, selection and synthesis of high-level evidence from eligible SRs of telehealth interventions addressing stroke secondary prevention outcomes (phase-1), and identification, screening, selection and synthesis of eligible primary studies that used specified behavior change theory and/or techniques from these SRs (phase-2). The protocol for this overview was previously published 26 as a public record of the review. The current overview describes telehealth interventions as distinct from interventions delivered face-to-face previously published. 27 Each step, in both overview phases, was conducted independently by two reviewers (PCP and CDCMF). A third reviewer (OL) was consulted where no consensus was initially reached through discussion.
Search methods
Electronic databases Embase, Epistemonikos, Medline and Cochrane were searched for published SRs (current to March 2023) using a comprehensive search strategy (available in Supplementary Files). Searches were supplemented by hand-searching reference lists of relevant SRs and reference lists of relevant guideline and policy documents.10,28,29 No language or time restriction for publications were applied. Given the multiplicity of terms often used to describe telehealth interventions (e.g., telemedicine, telerehabilitation, eHealth, mHealth) no search string was employed related to telehealth. Rather all SRs on stroke secondary prevention were screened against our inclusion criteria. Peer review of the electronic search strategy was conducted in line with best practice PRESS guidelines. 30
Phase-1: systematic reviews (SRs)
Selection criteria
Inclusion criteria were guided by the Population, Intervention, Comparator, Outcome and Study Type (PICOS) construct
24
:
Population: individuals post-stroke or transient ischemic attack (TIA), or cardiovascular disease populations where stroke was included as a discrete subpopulation; Intervention: telehealth interventions
12
targeting risk reduction by changing health behaviors and/or by self-management; Comparator: usual care or alternate active intervention; Outcomes:
Primary outcomes related to cardiovascular events: mortality (all cause and cardiovascular), recurrent stroke and other cardiovascular events; Secondary outcomes related to risk-reducing health behaviors: medication adherence (anti-hypertensive agents, cholesterol lowering agents, antiplatelet/anticoagulant agents), healthy eating, physical activity participation, smoking cessation, safe alcohol consumption and emotional self-regulation of psychosocial stress; Tertiary outcomes related to physiological risk factors: systolic blood pressure (SBP), diastolic blood pressure (DBP), lipid profiles and blood glucose. Study type: SRs pooling randomized controlled trials (RCTs) or cluster randomized controlled trials (CRCTs) of telehealth interventions to improve risk-reducing health behaviors post-stroke and reporting outcomes of interest. If reviews included other study designs, we included reviews from which it was possible to extract meta-analysis of RCTs or CRCTs data. For the study to be considered a systematic review, it was required to have identified itself as SRs, stated the objectives, named all databases searched, and detailed inclusion and exclusion criteria.
31
SRs were excluded if they included only studies that aimed to change the behaviors of health professionals in secondary prevention practice or health systems interventions which aim to improve secondary prevention protocols.
Identification of SRs and data extraction
Identified published SRs were independently screened for inclusion by two reviewers. Data were extracted from included SRs independently by two reviewers using an agreed proforma. Graphical Representation of Overlap for OVErviews (GROOVE) tool was used to identify the degree of overlap between identified SRs. 32 Telehealth interventions were classified according to the Center for Connected Health Policy's four domains of application: live videoconferencing (synchronous), store-and-forward (asynchronous), remote patient monitoring, and mobile health.33,34
Quality appraisal of included SRs
Each SR was independently rated for quality by two reviewers using the risk of bias in SRs (ROBIS) tool. 35
Best-evidence synthesis of reported SRs results
A best-evidence synthesis was conducted for all published meta-analyses affecting significant change in pre-identified outcomes of interest. Grading of Recommendations Assessment, Development and Evaluation (GRADE) criteria 36 were applied to establish the certainty of evidence they provided. Judgement of GRADE quality for each comparison was agreed by consensus of all authors, with consideration of risk of bias of included studies, 37 inconsistency, 38 indirectness, 39 imprecision 40 and publication bias. 41 Where two or more reviews reported meta-analysis for the same outcome and intervention, the best-evidence was determined by consensus of authors, based on the quality appraisal of the SR of origin, the degree of overlapping studies and the timeframe in which the review was conducted. High-level evidence knowledge gaps relating to telehealth interventions for stroke secondary prevention were identified.
Phase-2: primary studies (RCTs or CRCTs)
Selection criteria and identification of the primary studies
Unique primary studies identified from included SRs during phase-1 were next screened independently by two reviewers. Initial screening used the study description provided by the SRs of origin and then full text review was conducted to ensure the identified primary studies met specific study-level inclusion criteria: an RCTs or CRCTs study design; stroke or TIA population; theoretically-informed telehealth interventions delivery only (e.g., that described the underpinning theory and/or referenced behavior change techniques)42,43; and included primary, secondary or tertiary outcomes related to this overview. Studies which included interventions designed to alter care delivery processes or health professional education were excluded. Following screening, the interventions, as described in the included primary studies (and associated protocol paper, where relevant), were independently examined and extracted using domains 1 and 2 of TIDieR's 10 item checklist. 44
Data extraction from primary studies
Included primary studies had the following data items extracted independently by two reviewers: characteristics of the participants (e.g., number, age, sex, and time post-stroke), additional characteristics relating to the intervention (using domains 3–10 of the TIDieR checklist), 44 primary, secondary and tertiary outcomes, and results of between group comparisons. Telehealth interventions were again classified according to the Center for Connected Health Policy's four domains of application.33,34 Where any inconsistency between the information provided by the SR and the primary study was identified, the information provided by the primary study was considered.
Quality appraisal of primary studies
Two reviewers assessed the quality of each primary study using the Cochrane Risk of Bias Tool. 45
Data synthesis
Data from primary studies were grouped by technologies used to implement telehealth interventions and by outcomes of interest. Where data type and outcomes reported from two or more primary studies permitted, a meta-analysis was conducted. For continuous data, mean differences (MD) and 95% confidence intervals (95%CI) or standardized mean differences (SMD) were calculated from pooled data. For dichotomous variables, risk ratios (RR) with 95%CI using the Mantel-Haenszel method were employed. The certainty of the evidence for each meta-analysis by outcome of interest was reported based on GRADE criteria. 36 Again, the judgement of GRADE certainty for each comparison was agreed by consensus of all authors.
Results
Search
Figure 1 depicts the flowchart for the screening and selection of eligible studies across the two overview phases. The initial search applied across the electronic databases identified 14,721 records. In phase-1, 15 SRs were included.19–23,46–55 In phase-2, 229 primary studies were identified from these SRs, of which only 14 could be included, as RCTs that employed specified behavior change theory and/or techniques in the telehealth intervention delivered for individuals post-stroke.56–69

Flowchart of the identification, screening, and selection of eligible studies in the two phases of the overview.
Phase-1: systematic reviews (SRs)
Table 1 details the 15 included SRs. They dated from 2016–2022 and they searched across 19 different databases. The most employed electronic databases in >10% of all included SRs were Medical Literature Analysis and Retrievel System Online (Medline) (16%), Cochrane (18%), Excerpta Medica Database (Embase) (16%), and Cumulative Index to Nursing and Allied Health Literature (CINAHL) (12%). Six (33%) SRs19,20,46,51,54,55 registered or published the review protocol in advance. Seven (47%) SRs20,46,48–50,52,54 reported adherence to the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) statement. 70
Description and methodological quality of systematic reviews included in the overview.
Legend: AMED - Allied and Complementary Medicine; BCT - behavior change technique; BMI - body mass index; CINAHL - Cumulative Index to Nursing and Allied Health Literature; CNKI - China National Knowledge Infrastructure; CPCI-S - Conference Proceedings Citation Index - Science; CVD – cardiovascular disease. DBP - diastolic blood pressure; EBSCO - Business Source Complete; EMBASE - Excerpta Medica Database; HbA1c - glycated haemoglobin; HTA - Health Technology Assessment Database; INSPEC - ISI Web of Knowledge; LDL - low-density lipoprotein; MEDLINE - Medical Literature Analysis and Retrievel System Online; OTseeker - Occupational Therapy System Evaluation of Evidence; PEDro - Physiotherapy Evidence Database; PRISMA - Preferred Reporting Items for Systematic Reviews and Meta-Analyses; PROSPERO - International Prospective Register of Systematic Reviews; PsycBITE – Psychological Database for Brain Impairment Treatment Efficacy; PsycINFO - Psychological Abstracts; SBP - systolic blood pressure; TC – total cholesterol; TIA - transient ischemic attack.
*Risk of bias in systematic reviews ROBIS tool (Domain 1: study eligibility criteria; Domain 2: identification and selection of studies; Domain 3: data collection and study appraisal; Domain 4: synthesis and findings; Overall - Risk of bias in the review. Colors: green - low risk of bias; red - high risk of bias; yellow - unclear)
Telehealth intervention domains permitted in the inclusion criteria of these SRs were: all domains (videoconferencing, store-and-forward, remote patient monitoring, and mobile health),49–52,55 remote patient monitoring and mobile health, 47 and only mobile health.19–23,46,48,53,54 Eight (53%) SRs21–23,47,49,50,52,53 rated as at high risk of bias, primarily because of concerns related to study eligibility criteria.
Nine SRs (60%)20,21,23,46,48,50–52,54 conducted meta-analyses addressing outcomes of interest to this overview (available in Supplementary Files). For primary outcomes related to cardiovascular events, one SR pooled data addressing mortality, recurrent stroke and other cardiovascular events. 48 For secondary outcomes related to risk-reducing health behaviors: five SRs pooled data addressing medication adherence20,21,23,46,48; two pooled data addressing physical activity participation48,54; one pooled data addressing smoking cessation 48 ; one pooled data addressing emotional self-regulation of psychosocial stress (depressive symptoms) 51 ; and none addressed healthy eating or safe alcohol consumption. For tertiary outcomes related to physiological risk factors: four SRs pooled data addressing blood pressure (recommended blood pressure targets, reduction in SBP and/or DBP)20,48,50,52; two pooled data addressing lipid profile (lipid targets, total cholesterol and low density lipoprotein (LDL))20,48 and none addressed blood glucose.
Table 2 depicts the best-evidence synthesis supporting telehealth interventions by GRADE of evidence for each meta-analysis by outcome demonstrating statistically significant effect sizes. For outcomes related to cardiovascular events, very low GRADE certainty of evidence was identified for telehealth interventions to reduce rates of recurrent angina and recurrent stroke and/or TIA. 48 For outcomes related to risk-reducing health behaviors, low GRADE certainty of evidence was identified for telehealth interventions to improve medication adherence21,46 and very low GRADE certainty of evidence to improve physical activity participation. 54 For outcomes related to physiological risk factors, very low GRADE certainty of evidence was identified for telehealth interventions to meet recommended blood pressure targets, 48 moderate GRADE certainty of evidence to reduce SBP 52 and a very low GRADE certainty of evidence to control LDL levels. 20
GRADE of evidence supporting telehealth interventions with statistically significant effects (meta-analyses from the included systematic reviews).
Legend: 95%CI - 95% confidence interval; DBP - diastolic blood pressure; GRADE - Grading of Recommendations Assessment, Development and Evaluation; LDL - low-density lipoprotein; MD - mean difference; NR – not reported; RCT - randomized controlled trial; ROB - Risk of bias; RR - Risk Ratio; SBP - systolic blood pressure; SMD - standardized mean difference; SMS - short message service.
Figure 2 depicts only slight overlap of primary studies between the 15 SRs identified, with a 2.15% degree of corrected covered area (CCA). The citation matrix for primary studies (available in Supplementary Files) identifies 6 (43%) key primary studies56,60,62,66–68 cited in more than one systematic review.

Phase 1: graphical representation of overlap for OVErviews (GROOVE) and overall results.
Phase-2: primary studies
Table 3 summarizes the 14 primary studies included following screening of RCTs. Included interventions were all broadly categorized under the Center for Connected Health Policy's domain33,34 of mobile health, with one study including both mobile heath and remote patient monitoring. 66 No primary studies identified used the live videoconferencing (synchronous) or store-and-forward (asynchronous) telehealth domains. The interventions identified were implemented through telephone/cellphone for call-based delivery56,58,59,61,63,67 or utilized a combination of technologies: cellphone and internet for app use, alongside a home blood pressure monitor 66 ; cellphone/telephone for call-based delivery alongside a home blood pressure monitor 64 ; computer and internet for web-site access 62 ; computer and internet for web-site access combined with a cellphone/telephone for call-based delivery 65 ; computer and internet to support sending SMS combined with a cellphone to receive SMS/call.57,60,68,69
Description of primary studies included in the overview considering the used technology and domain of application of theoretically-informed telehealth interventions
Legend: unmarked - information taken from systematic reviews; underlined - information taken from primary studies; BCT - behavior change technique; CG - control group; DBP - diastolic blood pressure; EG - experimental group; EQ-5D - EuroQoL-5 dimension; HDL - high density lipoprotein; HDRS - Hamilton Depression Rating Scale; heiQ - Health Education Impact Questionnaire; IPAQ - International Physical Activity Questionnaire; LDL – low density lipoprotein; MISTT - Michigan Stroke Transitions Trial; MMAS-8 - Morisky Medication Adherence Scale; mmHg - millimeter of mercury; PHQ-9 - Patient Health Questionnaire-9; SBP - systolic blood pressure; HADS - Hospital Anxiety Depression Scale; SMS - short message service.
*Between groups comparisons were not performed. After an intra-groups comparisons, median or logistic regression models were used for assessing potential within group differences.
The majority of primary studies (n = 9, 64%) were conducted in high income countries (Australia, Canada, Denmark, Korea, United Kingdom, and United States), with 36% (n = 5) performed in middle-income countries: China,67–69 Ghana 66 and Pakistan. 60 Sample sizes in primary studies ranged from n = 36 62 to n = 265. 65 Time post-stroke at trial entry ranged from less than one month56,59,66,67 to 188 months.56,61 Four studies did not provide information about time post-stroke.58,64,68,69
Behavior change theories and/or techniques implemented varied across the studies. Many were implemented as a single strategy in the included studies: coaching, 61 goal-setting,67–69 motivational interviewing,58,59 self-determination theory, 66 and social cognitive theory. 62 Other primary studies implemented reported theories and techniques in combination: cognitive behavioral therapy and problem-solving approaches, 63 health belief model and social cognitive theory, 60 motivational interviewing, self-efficacy and self-managed care theories, 64 self-management support, community resources, and decision support, 65 social cognitive theory and motivational interviewing, 56 and social cognitive theory, information-motivation-behavioral theory and operant condition. 57
The professional delivering the telehealth interventions, where clearly identified (n = 10, 71%), comprised: a nurse (n = 7, 50%),61,63,64,66–69 doctor and nurse combination (n = 1, 7%), 62 a pharmacist (n = 1, 7%) 59 and social workers (7%, n = 1). 65 The length of identified interventions varied from one 57 to six months.56,59,64,69 The majority of studies (n = 10, 71%) reported usual care as the control condition,56–60,62,63,65,68,69 although all control interventions reported were devoid of behavior change theory and/or techniques.
The methodological quality of RCTs included in phase-2 is summarized in Table 4. Domains with the highest risk of bias were noted to be blinding of participants and personnel (n = 14, 100%) and blinding of outcome assessment (n = 3, 21%).
Methodological quality of primary studies included in the overview (phase-2) based on cochrane risk of bias.
Of the primary outcomes of interest, two studies reported recurrent stroke rates as an outcome.65,69 Secondary outcomes of interest reported included medication adherence (n = 8),59,60,62,64,66–69 healthy eating (n = 4),58,62,67,68 physical activity participation (n = 6),56,58,61,62,67,68 smoking cessation (n = 3),56,58,62 safe alcohol consumption (n = 5),58,61,62,67,68 and emotional self-regulation of psychosocial stress (anxiety and depression) (n = 4).57,58,63,65 Tertiary outcomes of interest reported included SBP and DBP control (n = 7 for both),56,60,61,64,66,68,69 total cholesterol levels (n = 3),56,61,62 triglyceride levels (n = 2),61,62 LDL levels (n = 1) 61 and HDL levels (n = 1). 61
Overview of behavior change and self-management theoretically-informed telehealth interventions for stroke secondary prevention
Table 5 depicts GRADE of evidence supporting theoretically-informed telehealth interventions for each meta-analysis conducted by outcome.
GRADE of evidence supporting telehealth interventions (meta-analyses of primary studies) (phase-2)
Legend: 95%CI - 95% confidence interval; DBP – diastolic blood pressure; GRADE - Grading of Recommendations Assessment, Development and Evaluation; MD - mean difference; ROB - Risk of bias; RCT - randomized controlled trial; RR - Risk Ratio; SBP - systolic blood pressure; SMD - standardized mean difference; SMS - short message service.
Primary outcomes related to cardiovascular events
Data presented permitted pooled analysis from the two studies that reported recurrent stroke outcomes measured as the number of events.65,69 Meta-analysis demonstrated a nonsignificant reduction in recurrent stroke risk (RR: 0.63, 95%CI: 0.33 to 1.19, I²: 0%, random-effect) in favor of telehealth interventions (available in Supplementary Files), with very low GRADE certainty of evidence.
Secondary outcomes related to risk-reducing health behaviors
Medication adherence
Data presented permitted pooled analysis from seven studies that reported medication adherence outcomes.59,60,64,66–69 The following measures were used in the studies pooled to inform this outcome: Health Promoting Lifestyle Profile II (HPLP II) (medication adherence subcategory),67–69 medication possession ratio score,59,66 Morisky Medication Adherence Scale (MMAS),60,66 and percentage compliance for one to three medications. 64 Meta-analysis demonstrated a significant improvement in medication adherence (SMD: 0.38; 95%CI: 0.13 to 0.64; I²: 72% random-effect) in favor of telehealth interventions (Figure 3), with low GRADE certainty of evidence. Interventions contributing to this evidence-base used telephone/cellphone for call-based delivery,59,67 computer and internet to support sending SMS combined with a cellphone to receive SMS/call,60,68,69 cellphone/telephone for call-based delivery alongside a home blood pressure monitor, 64 cellphone and internet for app use alongside a home blood pressure monitor. 66 The interventions were informed by motivational interviewing, 59 health belief model and social cognitive theory, 60 motivational interviewing, self-efficacy and self-managed care theories, 64 self-determination theory, 66 and goal-setting.67–69

Medication adherence outcome for the comparison of telehealth interventions versus usual care.
Healthy eating
Data presented permitted pooled analysis from all four studies that reported healthy eating outcomes.58,62,67,68 Data were pooled from studies employing the following measures: number of servings of fruits and vegetables consumed per week, 58 amount of fruits and vegetables consumed per week, 62 and HPLP II (nutrition and low-salt diet subcategories).67,68 Meta-analysis demonstrated a significant improvement in healthy eating (SMD: 0.38; 95%CI: 0.15 to 0.60; I²: 38%, random-effect) in favor of telehealth interventions (Figure 4), with low GRADE certainty of evidence. Interventions contributing to this evidence-base used telephone/cellphone for call-based delivery,58,67 computer and internet for web-site access, 62 computer and internet to support sending SMS combined with a cellphone to receive SMS/call 68 and were informed by motivational interviewing, 58 social cognitive theory, 62 and goal-setting.67,68

Healthy eating outcome for the comparison of telehealth interventions versus usual care.
Physical activity participation
Data presented permitted pooled analysis from four studies that reported outcomes measuring physical activity participation.58,61,67,68 Data were pooled from studies that used the following measures: number of 20-min sessions per week, 58 International Physical Activity Questionnaire (IPAQ), 61 and HPLP II (physical activity subcategory).67,68 Meta-analysis demonstrated a nonsignificant increase in physical activity participation (SMD: 0.10; 95%CI: −0.68 to 0.88; I²: 92%, random-effect) (available in Supplementary Files), with very low GRADE certainty of evidence.
Smoking cessation
Data presented permitted pooled analysis from two studies that reported smoking cessation measured as the number of individuals who stopped smoking.56,62 Meta-analysis demonstrated a nonsignificant increase in smoking cessation rates (RR: −0.00, 95%CI: −0.12 to 0.11, I²: 0% random-effect) (available in Supplementary Files), with very low GRADE certainty of evidence.
Safe alcohol consumption
Data presented permitted pooled analysis from two studies that reported outcome measures addressing safe alcohol consumption (HPLP II; unhealthy use of alcohol subcategory).67,68 Meta-analysis demonstrated a nonsignificant reduction in alcohol consumption (SMD: −0.94; 95%CI: −2.60 to 0.72; I²: 97%, random-effect) (available in Supplementary Files), with very low GRADE certainty of evidence.
Emotional self-regulation of psychosocial stress
Data presented permitted pooled analysis from two studies that reported outcomes addressing emotional self-regulation (anxiety and depression).57,58,65 The following measures were reported in studies addressing this outcome: Hospital Anxiety and Depression Scale (HADS)57,58 and Patient Health Questionnaire-9 (PHQ-9). 65 Meta-analysis demonstrated a nonsignificant improvement in emotional self-regulation of psychosocial stress (anxiety and depression) (SMD: 0.05; 95%CI: −0.16 to 0.26; I²: 10%, random-effect) in favor of the telehealth intervention (available in Supplementary Files), with very low GRADE certainty of evidence.
Tertiary outcomes related to physiological risk factors
Systolic blood pressure
Data presented permitted pooled analysis from four studies that reported SBP (mmHg) as an outcome measure.61,64,68,69 Meta-analysis demonstrated a significant reduction in SBP (MD: −9.19; 95%CI: −5.49 to −12.89; I²: 0%, random-effect) in favor of telehealth interventions (Figure 5), with moderate GRADE certainty of evidence. Interventions contributing to this evidence-base used telephone/cellphone for call-based delivery, 61 cellphone or telephone for call-based delivery alongside a home blood pressure monitor, 64 computer and internet to support sending SMS combined with a cellphone to receive SMS/call.68,69 The interventions were informed by coaching, 61 motivational interviewing, self-efficacy and self-managed care theories, 64 and goal-setting.68,69

Systolic blood pressure outcome (mmHg) for the comparison of telehealth interventions versus usual care.
Diastolic blood pressure
Data presented permitted pooled analysis from four studies that reported DBP (mmHg) as an outcome of interest.56,61,64,68 Meta-analysis demonstrated a nonsignificant reduction in DBP (MD: −6.34; 95%CI: 3.06 to −15.73; I²: 91%, random-effect) in favor of the telehealth interventions (available in Supplementary Files), with very low GRADE certainty of evidence.
Lipid profiles: total cholesterol and triglyceride control
Data presented permitted pooled analysis from all three studies that reported an outcome of total cholesterol (mg/dl)56,61,62 and from two studies that reported an outcome of triglyceride (mg/dl).61,62 Meta-analyses demonstrated a nonsignificant increase in total cholesterol levels (MD: 7.42; 95%CI: −3.83 to 18.66; I²: 0%, random-effect) (available in Supplementary Files) and a nonsignificant reduction in triglyceride levels (MD: −6.02; 95%CI: −31.86 to 19.82; I²: 0%, random-effect) in favor of telehealth interventions (available in Supplementary Files), with very low GRADE certainty of evidence for both outcomes.
Discussion
To the best of our knowledge, this overview is the first to critically appraise and consolidate evidence from SRs on the effectiveness of telehealth interventions designed to affect behavior change and self-management, delivered to individuals for stroke secondary prevention and the first to provide high-level pooled data for theoretically-informed telehealth interventions. The best-evidence synthesis conducted from fifteen published SRs supports telehealth interventions to affect significant reduction in rates of recurrent angina and recurrent stroke and/or TIA (both with very low GRADE certainty), improvement in medication adherence (low GRADE certainty), physical activity participation (very low GRADE certainty), and achievement of recommended blood pressure targets (low GRADE certainty), reduction in SBP (moderate GRADE certainty) and LDL levels (very low GRADE certainty). Phase-2, which conducted new meta-analyses of data from 14 primary studies which had a theoretical underpinning, in line with best-practice, also demonstrated significant improvements in medication adherence (low GRADE certainty) and SBP reduction (moderate GRADE certainty) and identified new evidence, albeit with low GRADE certainty, for the lifestyle-related outcome of health eating, in favor of telehealth interventions. With the exception of SBP, greater certainty of evidence is required to confirm the utility of telehealth interventions in stroke secondary prevention. These results direct what can now be done and what should be carefully considered regarding theoretically-informed telehealth interventions for stroke secondary prevention. Notably they indicate the need for studies to measure and document cardiovascular events outcomes for secondary prevention and the need for further high quality, well conceptualized trials in this area.
The most interesting result of this overview concerns the lack of evidence for primary outcomes in stroke secondary prevention related to cardiovascular events. Only one published SR performed a meta-analysis addressing the outcome of recurrent cardiovascular events, 48 with very low GRADE certainty of evidence found. Only two studies were included in this meta-analysis. 48 Context and populations varied between the two studies included in this meta-analysis. One was conducted in a hospital setting 71 and one included a mixed population of individuals with cardiovascular disease. 72 Thus, this meta-analysis does not strengthen the evidence on telehealth interventions for stroke secondary prevention alone. In phase-2, it was possible to perform a new meta-analysis with data from two studies65,69 that included only participants post-stroke and that had recurrent stroke as an outcome. Here, a nonsignificant reduction in recurrent stroke, in favor of the telehealth intervention (very low GRADE certainty), was identified, downgraded primarily because of imprecision related to small participant numbers and risk of bias issues. Both studies from which data were drawn had short intervention times (3 and 6 months, respectively),65,69 neither included longer-term follow up post intervention and only one study detailed time from stroke at trial entry. 65 Considering the variability of stroke recurrence rates by time post-stroke, 3 it is important that future studies present a longer follow-up time and provide clearer information about the participants time from stroke at trial entry.
Medication is considered a cornerstone of stroke secondary prevention. 10 However, it is well established that up to 40% of individuals post-stroke have poor medication adherence 73 and medication persistence. 74 Across both phases of the present overview, low GRADE certainty of evidence for telehealth interventions targeting improved medication adherence was identified. Methodological concerns in both cases required the evidence to be downgraded. Therefore, future studies that aim to improve medication adherence post-stroke using telehealth interventions should prioritize the methodological quality of the study and ensure adequate sample sizes. Providing detailed intervention descriptions that include the theoretical underpinning and/or techniques may facilitate meta-analyses grouping by behavior change techniques/theory in the future to increase the certainty of evidence supporting theoretically-informed telehealth interventions and direct evidence-based intervention delivery in practice.
Ten potentially modifiable risk factors are collectively associated with 90% of the population attributable risk (PAR) for stroke worldwide. 75 Hypertension constitutes the largest modifiable risk factor 75 and this overview of reviews identifies that telehealth interventions post-stroke have the strongest certainty of evidence (moderate GRADE) to reduce SBP by over 9 mmHg. This finding has clinical relevance in stroke secondary prevention as a 10 mmHg reduction in SBP is reported by meta-analysis to significantly reduce the risk of coronary heart disease, stroke and heart failure and is associated with a 13% reduction in all-cause mortality. 76 Physical inactivity is the second largest PAR for stroke. 75 Activity participation alongside other lifestyle related PAR for stroke including diet, smoking and unsafe alcohol consumption are also important targets for stroke prevention interventions. 75 Only one published SR included in this overview provided meta-analyses addressing physical activity participation outcomes, again, with very low GRADE certainty for this finding. When interrogated at primary study level (in phase-2 of this overview), new meta-analyses, albeit with limited study numbers, was permitted for each of these outcomes. Only the outcome of healthy eating provided evidence (low GRADE certainty) in favor of telehealth interventions. Again, high risk of bias in the majority of RCTs and varied effect sizes across studies necessitated a downgrading of the evidence. Once again, high quality, theoretically-informed telehealth interventions post-stroke that address lifestyle related risk factors are required to advance the secondary prevention evidence base in this area.
The gaps highlighted by this overview can help shape future research priorities, and direct future research in this field. There is a need for telehealth trials, with longer follow-up time, that are designed, adequately powered and conducted to address outcomes of stroke recurrence, as well as mortality (all cause and cardiovascular) and other cardiovascular events. Additionally, studies designed to investigate the effectiveness of theoretically-informed (theory based or employing specified behavior change techniques) telehealth interventions with individuals post-stroke are needed to address outcomes related to risk-reducing health behaviors, including the promotion of physical activity, which is the second largest PAR for stroke. 75 No published meta-analysis or primary study identified in this review addressed the outcome of blood glucose levels. Considering that diabetes mellitus is also one of the ten potentially modifiable risk factors of stroke worldwide 75 and that the estimated prevalence of diabetes in individuals post-stroke is 28%, 77 reducing blood glucose levels is a legitimate target for theoretically-informed telehealth interventions post-stroke.
Strengths and limitations
This overview of reviews, adhering to the PRIOR guidelines, critically appraised and consolidated evidence from published SRs of telehealth interventions delivered to address modification of recurrent risk through behavior change and self-management post-stroke. By applying GRADE criteria to published meta-analyses and to new syntheses conducted on primary study level data, the current certainty of evidence associated with telehealth interventions was elucidated to aid in interpretation and application of the findings, where relevant. Furthermore, care was taken at primary study level to include only interventions that were theoretically-informed by behavior change theory and/or techniques, in line with best practice recommendations, 8 that acknowledge the complexity in implementing behavior change and self-management interventions. This narrowed the critical lens provided by previous SRs, where only slight overlap in studies existed across reviews. Furthermore, it allows better replication of the interventions in clinical practice by professionals who wish to provide telehealth interventions for stroke secondary prevention.
As phase-2 of this overview utilized primary studies included in the published SRs, it is possible that more recent RCTs may have been excluded. As SRs of RCTs were the sole focus of this overview, the acceptability and uptake of telehealth interventions, alongside their perceived utility were not considered from the perspective of individuals with stroke. Although high levels of satisfaction and acceptance of telehealth interventions for health professional and individuals post-stroke have been reported in the literature, 78 future studies are required to specifically examine end-users’ experiences of telehealth interventions for behavior change and self-management post-stroke and to explore the more effective mechanisms of delivery. Limited data were available for the majority of outcomes of interest in this overview, and no RCTs were identified for a number of outcomes of interest in stroke secondary prevention. Results presented for the majority of outcomes reported need to be interpreted with caution due to the low GRADE certainty of evidence assigned. In addition, limited data provided in study descriptions in many primary studies prevented examination of the findings in relation to the optimal time to deliver interventions of this nature post-stroke, the impact of age of the participants, or the professionals who implemented the telehealth interventions.
Conclusions
Insufficient evidence currently exists by published SRs to support the role of telehealth interventions post-stroke to reduce cardiovascular mortality. Evidence presented does support telehealth interventions to make a meaningful improvement in medication adherence and reduction in SBP, but does not allow replication of the intervention due to notable heterogeneity in the interventions currently pooled in published meta-analyses. Consolidation of evidence on the effectiveness of theoretically-informed telehealth interventions for behavior change and self-management delivered to individuals for stroke secondary prevention provided more granular detail, but only in the telehealth domain of mobile interventions. Here, evidence supports coaching, motivational interviewing, self-efficacy, goal-setting and self-managed care in affecting significant reductions in SBP in comparison to usual care, with moderate GRADE certainty of evidence. Evidence supporting theoretically-informed telehealth interventions to improve medication adherence and health eating currently has too low certainty of evidence to inform practice. High quality RCTs that implement theoretically-informed telehealth interventions addressing both cardiovascular and lifestyle related outcomes and with longer-term follow-up are required.
Supplemental Material
sj-docx-1-jtt-10.1177_1357633X241238779 - Supplemental material for Effectiveness of behavior change and self-management theoretically-informed telehealth interventions for stroke secondary prevention: An overview of systematic reviews
Supplemental material, sj-docx-1-jtt-10.1177_1357633X241238779 for Effectiveness of behavior change and self-management theoretically-informed telehealth interventions for stroke secondary prevention: An overview of systematic reviews by Paula da Cruz Peniche, Christina Danielli Coelho de Morais Faria, Patricia Hall, and Olive Lennon in Journal of Telemedicine and Telecare
Footnotes
Data availability statement
The study, as a review of reviews, uses only published data. All included studies are referenced. Important data that validates the results of the present study are presented as supplementary materials, including the search strategy employed and the list of articles that were excluded as they did not meet the eligibility criteria.
Declaration of conflicting interests
The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
Funding
The authors disclosed receipt of the following financial support for the research, authorship and/or publication of this article: Financial support was provided by the Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES-Finance code 001), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPQ), Pró-reitoria de Pesquisa da Universidade Federal de Minas Gerais (PRPq/UFMG) and Worldwide Universities Network (WUN).
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References
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