Psychometric testing of the depressive cognition scale in women with type 2 diabetes.

Depression is prevalent in young and middle-aged diabetic women. Although cognitive depressive symptoms precede the development of depression, there is no screening instrument to measure these symptoms in diabetic patients. This study tested the psychometric properties of the Depressive Cognition Scale (DCS) in a convenience sample of 83 women with Type 2 diabetes. Alpha coefficient for the 8-item scale was .85, and the average inter-item correlation coefficient was .42. Construct validity was supported by correlations in the expected directions between the DCS and measures of learned resourcefulness, depressive symptoms, and health practices. Factor analysis presented a single dimension of 8 items. These findings suggest that the DSC will be useful in identifying patients with chronic conditions such as diabetes who are at risk for the development of clinical depression.