Abstract
Several national reports and many individuals in the clinical oncology community have defined the adolescent and young adult (AYA) cancer population as individuals diagnosed between the ages of 15 and 39. However, neuroscience and developmental research have identified important decision-making skills (e.g., information processing, reasoning, emotion regulation) that are not fully developed during adolescence, making general, AYA-focused doctor–patient interaction guidelines potentially questionable for the adolescent cancer population. Most studies include adolescents in samples of pediatric cancer patients or include adolescents in samples of young adult cancer patients, but studies rarely consider adolescent cancer patients as a distinct, developmentally unique group. A systematic literature review was undertaken in October 2014 to begin to understand what is known about the doctor–patient relationship and communication preferences within adolescent oncology. From the 25 included studies, three important conclusions emerged: (1) discrepancies among adolescent patients, parents, and providers about the desired extent of involvement in treatment-related decisions; (2) patient desire for developmentally and culturally appropriate information provision; and (3) the desire and preference for how information is delivered, with recognition that these preferences may change with age. There was some variation in themes by study design, with studies directly observing medical consultations reporting less adolescent involvement in discussions than studies that surveyed doctors. The results of this review support the need for developmentally focused research and clinical guidelines that emphasize the experience of adolescent cancer patients separate from their older and younger counterparts.
T
Adolescence is a period of transition from the dependence of childhood to the independence of adulthood, and begins at puberty, typically around the age of 12, with hormonal and physical changes.2,3 There is currently no agreed upon definition of “adolescent” within the cancer field due to developmental variability within this period of time, 4 making it difficult to focus on this population's specific cancer care needs. Adolescence is characterized by important cognitive and social changes that are unique to this developmental period, making it important to consider this population separate from their older and younger counterparts within the cancer setting. 5
Adolescents experience a number of individual changes during this stage of development, including improvement in reasoning skills and information processing abilities. 6 Abstract and hypothetical thinking develops throughout early adolescence and into middle adolescence. By late adolescence individuals are able to utilize foresight, consider multiple sources of information when making decisions, plan ahead, and set goals and achieve them.3,6–9 It is likely that these cognitive improvements allow adolescent cancer patients to process and utilize complex information to help make decisions concerning their healthcare. However, these improvements in ability to plan ahead and consider multiple sources of information continue into young adulthood. 10 Therefore, although adolescent brain function has matured from early and middle childhood, there are still some important functions that are developing as they enter the later teenage years.
Another important task of adolescence is the development of autonomy and independence 11 within the context of supportive parental relationships that provide the opportunity for adolescents to develop their own beliefs and values.12–16 Within the context of chronic illnesses such as cancer, parents are often faced with significant pressure to make critical decisions for their children and face unmet support needs and guilt over making these medical decisions, which can ultimately have a negative impact on their own health status.17–23 The unique role played by parents in the adolescent cancer setting and the pressures they face make it important to consider their role in the doctor–patient relationship as well.
Previous reports focused on individuals aged 15–391,24 provide a point of entry for researchers to develop more nuanced approaches to specific age groups within the wide AYA population. Adolescents are beginning to gain important decision-making skills, develop a sense of autonomy, and experience changes in their parent–child relationships. Therefore, adolescents need developmentally appropriate support from their parents and healthcare providers. This systematic literature review begins to discern the specific, unique experience of the doctor–patient relationship by adolescent cancer patients diagnosed with cancer between the ages of 12 and 18.
Methods
A systematic literature search was conducted in October 2014 using the PubMed and PsycINFO databases. Combinations of the following search terms were utilized in order to conduct a broad search for relevant articles: doctor patient communication, doctor patient relationship, doctor patient interaction, pediatric cancer, childhood cancer, adolescent and young adult cancer, adolescents, adolescence, theory, cancer, communication skills, chronic illness, family communication, and illness. Articles were limited to those written in English and published within the last 10 years for the most up-to-date review of the literature. The following additional inclusion criteria were also established for studies included in this review: (1) sampled adolescent cancer patients, (2) focused on patient outcomes or experience of the doctor–patient relationship, and (3) utilized quantitative or qualitative research methods.
Adolescent cancer patients were operationally defined as individuals diagnosed with cancer between the ages of 12 and 18. This definition varies from the NCI definition of 15–39 years of age for three important reasons. First, developmental research suggests that puberty (the start of adolescence) typically occurs around the age of 12,2,3 and in order to examine how doctor–patient relationships may vary across the entirety of adolescence, it is important to include patients in early adolescence. Second, in many countries, 18 is the age of adulthood and the point when patients are allowed to make their own independent medical decisions, placing them in a different position from those individuals under the age of 18 when it comes to the role they can play within the doctor–patient relationship. Finally, there are cross-cultural variations in the definition of “adolescent,” and in order to include studies from any country, an age range was chosen to account for these variations. 25
Studies that focused on cancer screening or prevention in adolescent populations were not included, as the focus of this review was on the doctor–patient relationship within the oncology setting, and most screening and prevention conversations are done in the pediatric or general practice setting. Excluding cancer prevention and screening studies, published studies that focused on adolescents at any phase of the cancer care continuum were eligible for inclusion in this review. Studies that were conducted with doctors or parents were eligible for inclusion if they clearly stated the age range of the patients they worked with/cared for or the questions specifically targeted the experience of patients between 12–18 years of age. Finally, studies that were conducted in other countries were also included to allow for the broadest understanding of the experience of the doctor–patient relationship in adolescent oncology. Exclusion criteria for this review included articles focused on theories, case studies, policy recommendations, and commentaries.
The initial search retrieved 1268 potential articles. Titles and abstracts were downloaded for all 1268 articles and reviewed. A review of the titles and abstracts eliminated 986 articles for not meeting inclusion criteria. Next, the full texts of 282 articles that appeared to meet the inclusion criteria were downloaded. After review of the full texts of the articles for eligibility, an additional 257 articles were eliminated for not meeting inclusion criteria. A total of 25 articles were reviewed for this paper. A flow chart of the search and selection process can be found in Figure 1.

Literature review search process. The above figure includes information concerning the review, exclusion, and inclusion of all articles in this systematic literature review. From the top of the figure down, the first box represents the total number of articles identified using the search terms. The second box represents the number of titles and abstracts reviewed. The third box (arrow pointing to the right of page toward this box) represents the number of articles excluded based on title and abstract review and main reasons for exclusion. The fourth box represents the number of full-text articles reviewed. The fifth box (an arrow pointing to the right of page toward this box) represents the number of articles excluded based on full-text review and the main reasons for exclusion. The final box represents the final number of articles included in the literature review.
Of the articles downloaded for full text review, the most common reasons for article exclusion were not having adolescents in the study sample (n=188), neither quantitative or qualitative research design (i.e., theoretical paper, policy paper, commentary, etc.; n=27), and no focus on patient outcomes or experience of the doctor–patient relationship (n=27). Because the goal of this review was to examine the unique experience of patients between the ages of 12 and 18, a conservative approach for inclusion based on sample age was taken. Specifically, if an article described a sample with an age range that included individuals between the ages of 12 and 18 along with older or younger patients, articles were only included if the authors specifically described results in terms of age groups or the mean sample age was between the ages of 12 and 18. Details of the articles discussed in this review are described in Table 1.
Results
The current systematic literature review revealed three major themes of the doctor–patient relationship among adolescent cancer patients: (1) treatment decision making, (2) information provision, and (3) relationship preferences of adolescent patients with their medical providers.
Treatment decision making
Treatment decision making is one of the most important aspects of cancer care and encompasses all decisions made, both major and minor, concerning an adolescent's medical care, and there should be ample time to make informed decisions.26,27 The reviewed studies, however, highlighted an incongruity between adolescents' opinions concerning their involvement in treatment decision-making and the opinions of their parents and physicians. Hinds et al. 28 (n=20), Stinson et al. 29 (n=29), and Zwaanswijk et al. 30 (n=25) analyzed the responses of adolescent cancer patients both on and off treatment and found that adolescents preferred to be involved in decision making, believed they should make the final decision concerning treatment, believed they should advocate for themselves, and that they were pleased with their decision if they were able to “do what they wanted” (p. 9151). 28 Teens (n=3) also wanted the opportunity to sign the consent form for clinical research enrollment in order to have some control over the decision. 31
Despite these preferences of adolescent patients, with the exception of two studies,32,33 the articles addressing treatment decision making that included the perspective of someone other than the patient suggested that adolescents were not or should not be involved in treatment decision making.31,34,35 For example, Miller et al. 35 observed informed consent conferences (ICCs) for Phase I clinical trials between adolescent cancer patients (age range: 7–21 years), their parents, and the doctor. The authors observed 85 ICCs at six different U.S. hospitals, and calculated the total percentage of the ICC that included dialogue with the adolescent patient. An interaction was considered to involve the patient if the parent or doctor was speaking directly to the patient or the patient was speaking directly to the parent or the doctor. They found that although the vast majority of adolescents were present for part or all of the informed consent process, only 43% of the communication within the ICC involved the adolescent patient. The patient was asked directly about their decision concerning trial enrollment in 66% of the ICCs, the patient provided their preference concerning trial enrollment in 67% of the ICCs, and the physician or parent requested that the patient sign the consent form in 49% of the ICCs. Within these informed consent meetings, communication directly between the patient and physician increased with patient age.
Talati et al. 32 examined doctors' reactions to medical treatment refusal in minors through a vignette study. Doctors read vignettes that varied in three main ways: prognosis (80% 5-year survival rate vs. 15% 5-year survival rate), who refused (parent, minor, or both), and the age of the minor (11 years vs. 16 years). In the “good prognosis” scenario, the majority of doctors would treat in spite of a refusal in all possible scenarios. Of those doctors who would not treat, they were more likely to accept the refusal of the 16-year-old patient compared with the 11-year-old patient. Doctors were more likely to accept treatment refusal in the “poor prognosis” patient in all possible scenarios. Within this scenario, when a parent and minor differed on their preference for treatment, the majority of doctors would respect the wishes of the 16-year-old patient. In addition, more than half of the doctors believed the 16-year-old patient was the primary decision maker, whereas 98% of the doctors in this study believed the parent was the primary decision maker for the 11-year-old patient. Yap et al. 33 surveyed 103 doctors about their experience of clinical trial consent meetings, and found that the average age doctors believed patients should be involved in the consent discussion was 10 years of age, and the average age doctors believed patients should be involved in the decision-making process was 12 years of age.
However, some studies reported that parents and doctors felt that they should control the treatment-related information provided to the adolescent.31,34,36 There were cultural variations among these findings. The studies conducted by Seth 36 with parents and de Vries et al. 34 with doctors both reported a preference to restrict the information given to adolescent patients. These studies were conducted in India and the Netherlands, respectively. The roles held by parents, doctors, and adolescents may differ in these countries compared with the United States, making it important for doctors to consider the cultural background of the family they are working with and tailor their communication patterns to abide by important cultural values.
Information provision
Despite the common practice to focus information provision on the parents, 29 adolescents want information directly from their providers about cancer as a disease, available treatments, physical therapy (for rehabilitation), complementary and alternative medicine, psychological therapy, fertility status, fertility preservation, long-term effects of treatment, and survivorship care.27,29,37–39 In individual and focus group interviews, adolescents discussed the importance of doctors and nurses providing information directly to them in a developmentally appropriate manner.29,30
One of the most common issues discussed within the adolescent cancer population was fertility.27,40–42 Overall, doctors report that it was an important issue to discuss with all patients,40–42 and more than 60% of healthcare providers report discussing fertility issues with their adolescent patients.40,41 Doctors reported that their likelihood of discussing fertility with adolescent patients varied based on age, pubertal status, and the likelihood that their treatment would cause future problems with fertility.40–42 Additionally, doctors reported a variety of barriers to providing information about fertility or fertility preservation to this age group, including lack of access to preservation treatments, the financial burden of fertility preservation treatments, and doctors' belief that both adolescents and their families do not want information about fertility. 42 However, in the articles that reported discussions about fertility, four focused on the perspective of doctors who provided care to adolescent patients, one focused on the perspective of the patient, and no studies examined the opinions of family members.
Chapple et al. 27 discussed fertility from the perspective of the patient. Although their sample (n=18) of male patients included individuals diagnosed after the age of 18, responses provided by those participants diagnosed between the ages of 12 and 18 suggest that they would have liked additional counseling and information at the time of treatment concerning fertility issues. Despite the contribution of this study, it focused only on male respondents. With only the doctors' perspectives, the above research might indicate that discussions of fertility occur more frequently with adolescent patients. However, Chapple et al.'s 27 findings suggest that this may not be the case, and without more information from the patient's or the family's perspective, it is not possible to know if the barriers reported by doctors concerning the patient or family's desire for fertility information are accurate.
In responses to vignettes of different clinical oncology visits/experiences, adolescent patients on and off treatment and their parents preferred information to be given to both the patient and the parent simultaneously, but they reported that an 8-year-old patient should receive information at a different time from their parents compared with a 12-year-old patient. 43 In making decisions concerning clinical trial enrollment, adolescent patients reported that doctors' thorough description of the trial along with receipt of written information about the trial was beneficial in their decision-making process. 28 Baker et al. 26 conducted qualitative interviews with adolescent patients and their parents about enrollment in clinical trials, and found that both parents and adolescents wanted more information about the risks and benefits of the trial, wanted the information provided in a straightforward, developmentally appropriate manner, and wanted user-friendly consent forms. Baker et al. 26 also found differences in the priorities of parents and the priorities of adolescents when discussing clinical trial enrollment.
Intervention research has also begun to examine the importance of information provision in adolescent cancer patients. Engelen et al. 44 had adolescent cancer patients (n=193) fill out a health-related quality of life (HRQOL) form prior to a follow-up consultation. Doctors in the intervention group (n=94 patients) were then provided with this form prior to the patient's consultation. The authors found that quality of life dimensions were discussed more often within intervention group consultations compared with the control group consultations, and significantly more HRQOL problems in need of services were identified by providers in the intervention group.
The reviewed studies also found cultural variations in how much information adolescents may want to receive, or may actually receive, about their cancer and related treatment.30,36,45 Although studies suggest that information about cancer and its treatment is usually directed toward parents, 29 a cross-cultural study conducted by Parsons et al. 45 suggests that pediatric oncologists in the United States at least disclose the diagnosis to their adolescent patients, even if additional information is provided to the parents. In contrast to many of the other studies described, the U.S. pediatric oncologists in this study believed that information provision was highly important because it increases adolescents' participation in their cancer care, an important aspect of the healthcare transition that adolescents will face when they move to the adult healthcare setting. Fewer than half of the pediatric oncologists in Japan, in contrast, regularly disclosed the diagnosis to their adolescent cancer patients. 45 Additionally, most parents in India preferred to keep the cancer diagnosis from their adolescent children. 36 These variations highlight the importance of understanding and integrating the values and preferences of individuals and families from different cultures, particularly in light of the current era of patient-centered care and the increasing cultural diversity in the U.S. population.
Doctor–patient relationship preferences of adolescent cancer patients
Patients emphasize the need for reassurance, respect for their decisions, support, trust, continuity of care, and empathy from their doctors across the cancer care continuum, regardless of prognosis or potential outcome.28,30,43 Clemente 46 observed medical consultations with adolescent cancer patients, and found that doctors utilized a number of communication methods, such as narrow answers or nonanswer responses, in order to avoid answering adolescents' questions concerning their care and treatment.
Another observational study conducted at a hospital in Sweden analyzed interactions between pediatric and adolescent cancer patients, their doctors, and their parents. 47 The authors found that doctors utilized different communication patterns depending on the age of the patients. Most of the doctors utilized a child-centered approach, where they spoke directly to the patient, regardless of patient age. However, a family-centered approach was more commonly utilized with adolescent patients. Within the family-centered approach, doctors interacted with the family as a unit, and every family member's needs and concerns were addressed by the doctor.
Another important aspect of the doctor–patient relationship is the ability of the doctor to recognize signs of distress. The current healthcare setting, however, is lacking formalized training on the needs of adolescent patients, making it difficult for healthcare providers to identify distress in their patients. Hedström et al. 48 surveyed 53 adolescents with cancer, their nurses, and their physicians to analyze any discrepancies between adolescents' reports of distress and the nurses' and physicians' observations of distress in the same adolescents. Overall, the physicians and nurses were sensitive to a number of areas of patient distress, but both groups underestimated adolescent distress in two of the areas that adolescents viewed as the most distressing (i.e., worry about missing school and mucositis).
Adolescents also report a desire for doctor–patient relationship characteristics commonly described by adult cancer patients, including empathy when delivering poor prognosis, open and honest communication, sufficient time to discuss issues with their doctor, and having their salient questions answered.28,30,43 Bell et al. 49 found no difference between early, middle, and late adolescent patients in the timing of end-of-life discussions. However, the authors of this study examined data from medical records and patient chart reviews, and noted that very few charts clearly identified if the patients were involved in these discussions, making it difficult to determine if the lack of age differences was due to lack of involvement in the decision by the patient. Although there are some similarities in the preferences for the doctor–patient relationship in adolescent cancer patient, there are differences in the communication patterns utilized by doctors when talking to adolescent patients, 47 and some discrepancy in doctors' ability to identify areas of distress in adolescent cancer patients. 48
Discussion
The studies reviewed in this paper highlight the importance of understanding the fluidity of adolescent, family, and provider interactions during the illness experience34–36 due to a disconcordance between the views of parents and their adolescents, as well as providers, on a number of important cancer care topics such as decision making 36 and information provision. 26 Patient-centered care, a model of care researched within adult cancer populations, includes providing information to patients, understanding the patient's perspective, respecting the patient's psychosocial context, and sharing power and responsibility with the patient as important aspects of cancer care. 50 However, research examining patient-centered care often does not consider the role of the patient's psychosocial context. 51 As highlighted within this review, the role of developmental change and family relationships are important and necessary considerations within the adolescent oncology setting.
A clinical model, the Family Systems Illness Model, 52 provides a strong starting point for understanding both the similarities and differences between adolescent patients and other segments of the cancer population. The Family Systems Illness Model describes the importance of the family as the central focal point of the illness experience, and encourages healthcare providers to engage actively with both the patient and the family. Of particular interest, Rolland 52 highlights the need to consider the individual development of the patient, specifically their stage of life (i.e., adolescence) and the tasks that accompany that stage of development (i.e., gaining autonomy), and the stage of the family life cycle (i.e., families with adolescents) and the tasks that accompany that stage (i.e., increasing the flexibility of family boundaries and shifting parent–child relationships). As reported in this review, adolescents' desire an increased role in decision making as they age,30,43 and doctors in some reviewed studies supported this increased participation in decision making across time.32,33 This increased role in decision making is imperative to achieve certain developmental milestones such as autonomy and independence, 11 and requires changes in the parent–child relationship as well. 52 This increased role is also important clinically, 29 as adolescents will be expected to take on an increased role in their healthcare as they transition into the adult healthcare setting. Because adolescent patients are still minors and final medical decisions are made by the parents,53,54 parents must work with doctors in order to provide space for adolescent involvement in the decision-making process.
Therefore, incorporating the importance of family relationships and developmental changes into a patient-centered framework is important. Research examining patient-centered care suggests that this model of care is associated with a number of positive physical and psychosocial outcomes in various chronic illness populations. 51 However, most of this research has been conducted with adult populations, making it difficult to determine if this model of care is appropriate for adolescent populations. The Family Systems Illness Model takes into consideration the important changes during adolescence, and by incorporating these domains into the evidence-based, patient-centered care model often tested in the literature, we can begin to examine the most tailored, appropriate model of care for adolescent cancer patients.
Information tailored to the developmental stage and interests of adolescent cancer patients is one way in which doctors can begin to maintain the family as the center of the cancer experience. Information provision tailored to the adolescent provides an avenue for adolescents to play a role in their cancer care in conjunction with their parents, and strategies, such as those described in Engelen et al., 44 that allow adolescents to provide their doctors with information open up a more direct role for adolescents within the cancer setting. Additionally, Baker et al. 26 found that parents and adolescents had differing preferences for information concerning clinical trial enrollment. It is therefore imperative for future studies to consider multiple viewpoints within the adolescent cancer setting, including the patient, their family, and their healthcare provider.
Cross-cultural research suggests that there are differences in how much or how little parents want to disclose a cancer diagnosis to their pediatric and adolescent children,45,55 and diagnosis and poor prognosis are not always routinely disclosed to patients, regardless of age, in many countries outside the United States.56–60 Reviewed studies conducted in India, 36 the Netherlands, 34 and Japan 45 concur with these cultural variations, and found that parents and doctors reported restricting the information provided to adolescent cancer patients. These findings also support the importance of considering patients' psychosocial context when examining the doctor–patient relationship; the potential variations in these cultural belief systems are important to consider, as they may highlight the need for alterations in the communication patterns utilized with these families.
The current review provides a foundation for understanding the doctor–patient relationship in adolescent oncology. As we continue to move toward patient-centered and family-centered approaches to research and clinical care, this review can serve as a source of knowledge of the unique issues of the adolescent cancer population, some of which are similar to other age groups and others that are distinct. A strength of the extant literature is the variety of perspectives sampled within the described articles. Specifically, articles sampled adolescent cancer patients currently on treatment, adolescent cancer patients who have completed treatment, their parents, and their doctors about different issues concerning the doctor–patient relationship. As was highlighted throughout the review, these differing perspectives provided a rich picture of the doctor–patient relationships within the adolescent cancer setting. In a number of articles, the reports of doctors and parents did not agree with the adolescents' report of the same situations.27,40–42 Because of the developmental stage and legal rights of adolescent patients, the parents and doctors are also important participants within the medical consultation in the adolescent cancer setting. It is only through a collaboration between the adolescent, parent, and healthcare provider that adolescents will be able to participate within the medical consultation in a larger capacity, making it important for future studies to consider the perspectives of all three members of the medical consultation in the adolescent oncology setting.
The studies reviewed in this paper also had some limitations. Specifically, many of the studies included small sample sizes, did not statistically test for differences in age groups, and utilized heterogeneous age samples. These limitations are particularly relevant to the interpretation of findings from the current review because the few studies that did statistically test differences in age groups demonstrated significant differences in doctor–patient relationship preferences.32,43 Therefore, it is imperative that future research places a particular focus on examining these differences within adolescent patients, as well as differences between adolescent patients and their pediatric and adult counterparts.
This review provides an informative starting point for future research examining the unique experiences of adolescent cancer patients. Within the context of adolescent oncology, the doctor needs to manage the needs of the parent(s) as well as the needs of the adolescent patient. This balancing act can be challenging, and is often not the focus of medical education, making it difficult for doctors to handle this triadic relationship effectively. However, by considering the family's cultural beliefs, family life stage, and individual development, doctors can be better equipped to provide tailored, sensitive care to adolescent cancer patients and their families.
Footnotes
Acknowledgments
The authors would like to thank Cameron Froude, PhD, LMFT, for her feedback and suggestions on earlier drafts of this manuscript.
Author Disclosure Statement
No competing financial interests exist.
