Abstract
{\it Objective:} This study looked at female hospital cleaners and home help personnel who continued working despite problems or pain in their musculoskeletal system and where there was a risk of increase in sickness absence. The aim was to determine whether supportive intervention for these personnel at the workplace had an effect on the way that they experienced the physical and psychosocial aspects of their working environments.
{\it Methods:} The design was prospective with non-rando-mised intervention and reference groups. A selection of 55 questions about physical and psychosocial working environment from a national survey were used. Comparisons were made between intervention and reference groups and with data on a selection of the Swedish population of people in these professions.
{\it Results:} The results showed that in the hospital cleaners' intervention group the introduction of new cleaning materials and new cleaning methods seemed to contribute to a reduction in workload during the intervention period, which in turn gave them a better chance of taking rest breaks during working time. In the home helps' intervention group the results showed that the group had had a reduction both in workload and in more responsible tasks, and at the same time the psychosomatic stress reactions reduced after the intervention.
{\it Conclusions:} The results indicate that effects on the working environmental conditions as experienced could be obtained by a general multi-component support program at the workplace, but the number of variables influenced by the program was very small. The relatively limited effects may be explained by the fact that the impact of a support program depends on how well the remedial measures fulfil the need for such measures either at the workplace, in a work group or among the individual people at the workplace. This emphasises the importance of designing effective analysis tools for judging what remedial measures are needed before the measures themselves are tried out.