The emotional impact of end-stage renal disease: importance of patients' perception of intrusiveness and control.

The emotional impact of the intrusiveness of illness and patients' reduced control over several aspects of life were examined in the context of end-stage renal disease. A sample of thirty-five hemodialysis, ten continuous ambulatory peritoneal dialysis (CAPD), and twenty-five posttransplant patients participated in a standardized interview in which a series of eight self-report measures of positive and negative mood, life happiness, self-esteem, depression, and somatic symptoms of distress were obtained. Attending staff also completed a depression rating scale for each participant. Data reduction via principal-components analysis yielded two factors, corresponding to negative and positive mood, and these were submitted to covariance analyses in which age, general nonrenal health, and defensiveness were controlled statistically. Patients' perceptions of increased intrusiveness, and their perception of limited control over eleven life dimensions, each correlated significantly and uniquely with increased negative and decreased positive mood, suggesting that each of these two factors contributes importantly and independently to patients' distress. An "objective" continuum of intrusiveness, constructed by ranking the various treatment modalities represented in the sample, also related significantly to positive (but not to negative) mood levels.