Construct validity of a health questionnaire intended to measure the subjective experience of health among patients in mental health services.

Mental health services have been lacking systematic health-promoting activities, and health is often perceived as the absence of disease from a biomedical perspective. It is vital to develop methods to assess perceived health among patients in a broader perspective. The aim of the study was to investigate construct validity of a newly developed health questionnaire intended to measure subjectively experienced health among patients in mental health services. A cross-sectional study, including a randomly selected sample of 139 outpatients in contact with the mental health services, was performed in order to explore the relationship between perceived health and self-reported levels of self-esteem, symptoms, empowerment, quality of life and experiences of stigmatization. Self-esteem, symptoms, empowerment and quality of life altogether accounted for 70% of the variation in overall perceived health. Overall perceived health showed positive associations to self-esteem, empowerment and quality of life and negative associations to psychiatric symptoms, discrimination and rejection experiences. The findings suggest that perceived health as measured by the health questionnaire can be a meaningful and valid construct that may be useful for measuring health in clinical mental healthcare practice and in mental health services research.