Diabetes Care, Vol 23, Issue 3 325-329, Copyright © 2000 by American Diabetes Association
Development of a health status measure for older African-American women with type 2 diabetes
TA Elasy, CD Samuel-Hodge, RF DeVellis, AH Skelly, AS Ammerman and TC Keyserling
School of Medicine, Vanderbilt University, Nashville, Tennessee, USA. tom.elasy@mcmail.vanderbilt.edu
OBJECTIVE: To develop a health status measure in older African-American
women with type 2 diabetes. RESEARCH DESIGN AND METHODS: African-American
women, age > or =40 years with type 2 diabetes, were recruited from
central North Carolina to participate in three sequential phases: 1) Seven
focus groups were convened and transcripts evaluated to generate questions
and identify plausible domains; 2) Ten one-on-one cognitive response
interviews were performed to ensure clarity and cultural appropriateness of
the questions; and 3) 217 women participated in psychometric evaluation to
establish the internal consistency and validity of the instrument. RESULTS:
Three broad categories--mental, physical, and social well-being--captured
important issues generated during the focus groups. "My diabetes" was added
during the cognitive response interviews as a way of separating the impact
of diabetes from coexisting issues that affect health status. The response
option was changed from a six- to a four-point Likert scale to accommodate
subject preference. Using principal components and subsequent promax
rotation, we identified two hierarchical domains (mental and social
well-being) and a physical symptom index. The internal consistency
(Cronbach's alpha) of the mental and social well-being subscales are 0.83
and 0.93, respectively. A priori hypothesized correlations between
subscales along with each subscale and glycated hemoglobin, diabetes
duration, physical activity, and a perceived health competence scale helped
establish the construct validity of the instrument. CONCLUSIONS: A
culturally appropriate disease-specific health status measure for older
African-American women with type 2 diabetes has been developed. We have
established the internal consistency, construct validity, and factor
analytic properties of the measure. This measure should prove useful for
investigators who seek a health status instrument that addresses issues
germane to African-American women with type 2 diabetes.