Leg ulceration and perceived health: a population based case-control study
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Andrew Jull1, Natalie Walker, Maree Hackett
1Clinical Trials Research Unit, University of Auckland. a.jull@ctru.auckland.ac.nz
Objectives:
To quantify the effect of leg ulceration on health-related quality of life and to estimate a health state value for leg ulceration.
Design:
Population based case-control study.
Setting:
Two New Zealand health districts (population 540,468 people).
Subjects:
241 people with a leg ulcer of any aetiology, and 224 controls randomly selected from the electoral roll using stratified sampling.
Main Outcome Measures:
health-related quality of life as measured by the eight domains of the Short Form 36 question Health Survey, adjusted for age, sex and confounding co-morbidities; the physical component summary and mental component summary scores of the Short Form 36 question Health Survey standardised for age and sex; preference-based health state value derived from the Short Form 36 question Health Survey.
Results:
Completed Short Form 36 question Health Survey questionnaires were available for 230 cases (95%) and 218 controls (97%). Cases reported significantly lower mean scores than controls across all eight domains of the Short Form 36 question Health Survey (P < 0.0005). Mean domain scores for cases were also significantly lower than population norms. The mean physical component summary score for cases and controls was 45.2 versus 50.1 (P < 0.0001) and the mean mental component summary score was 48.1 for cases versus 51 for controls (P < 0.0001). The mean health state values (adjusted for age and sex) were 0.80 for cases and 0.89 for controls.
Conclusion:
Leg ulcers reduce quality of life to a similar extent as other common chronic conditions, such as arthritis and diabetes.
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