Structure of lifestyle disruptions in chronic disease: a confirmatory factor analysis of the Illness Intrusiveness Ratings Scale.

摘要: Background. The Illness Intrusiveness Ratings Scale (IIRS) measures the extent to which disease or its treatment both interfere with activities in important life domains. Before comparing IIRS scores within across groups it is crucial determine whether a common underlying factor structure exists patient populations. Objective. To investigate and evaluate stability diagnoses. Methods. responses from 5,671 respondents were pooled 15 separate studies concerning quality of eight groups: rheumatoid arthritis; osteoarthritis; systemic lupus erythematosus; multiple sclerosis; end-stage renal (maintenance dialysis); transplantation; heart, liver, lung insomnia. Data gathered by different methods (eg, interview, self-administered, mail survey) diverse contexts individual vs. group). Results. Exploratory maximum-likelihood analysis identified three factors randomly selected subset (n = 400), corresponding “Relationships Personal Development,” “Intimacy,” “Instrumental” Confirmatory corroborated this an independent subsample 2100). Complementary goodness-of-fit indices confirmed consistency three-factor solution, corroborating that are uniquely defined Coefficient alpha was high for total subscale scores. Conclusions. can be compared meaningfully groups. Both used depending on research objectives.