The dilemma of measuring perceived health status in the context of disability.
BACKGROUND
Advances in the conceptual differentiation of health from disability have not been incorporated in popular measures of perceived health status. The inclusion of function in the measurement of health presents a dilemma for researchers assessing the perceived health of people with functional limitations.


OBJECTIVE
The purposes of the present paper are to identify this problem in health measurement, describe its implications for disability and health researchers, and outline potential strategies for future measure development of perceived health status.


METHODS
Reflecting the International Classification of Function, Disability, and Health, distinctions among the concepts of health, function, and disability are reviewed. Implications of confounded health measurement are discussed in terms of monitoring health status, assessing health disparities, using health as a mediator or moderator of other outcomes, and assessing effectiveness of interventions. The problem of function confounded with health measurement is illustrated with findings using the SF-36 with persons with spinal cord injury.


RESULTS
Recommendations are provided for developing function-neutral measures of perceived health status.


CONCLUSIONS
New measures of perceived health status are needed that do not confound function with health.
Oregon Health & Science University, Portland, Oregon 97239, USA. gfk2@cdc.gov
Gloria L
GL
Krahn
Glenn
G
Fujiura
Charles E
CE
Drum
Bradley J
BJ
Cardinal
Margaret A
MA
Nosek
D000203:Activities of Daily Living; D006233:Persons with Disabilities / Q000145:classification; D006304:Health Status; D006801:Humans; D011788:Quality of Life; D013119:Spinal Cord Injuries