Abstract
Schizophrenia is a chronic disease with negative impact on patients' employment status and quality of life. This post-hoc analysis uses data from the QUALIFY study to elucidate the relationship between work readiness and health-related quality of life and functioning. QUALIFY was a 28-week, randomized study (NCT01795547) comparing the treatment effectiveness of aripiprazole once-monthly 400 mg and paliperidone palmitate once-monthly using the Heinrichs-Carpenter Quality-of-Life Scale as the primary endpoint. Also, patients' capacity to work and work readiness (Yes/No) was assessed with the Work Readiness Questionnaire. We categorized patients, irrespective of treatment, by work readiness at baseline and week 28: No to Yes (n = 41), Yes to Yes (n = 49), or No at week 28 (n = 118). Quality-of-Life Scale total, domains, and item scores were assessed with a mixed model of repeated measures. Patients who shifted from No to Yes in work readiness showed robust improvements on Quality-of-Life Scale total scores, significantly greater than patients not ready to work at week 28 (least squares mean difference: 11.6±2.6, p<0.0001). Scores on Quality-of-Life Scale instrumental role domain and items therein-occupational role, work functioning, work levels, work satisfaction-significantly improved in patients shifting from No to Yes in work readiness (vs patients No at Week 28). Quality-of-Life Scale total scores also significantly predicted work readiness at week 28. Overall, these results highlight a strong association between improvements in health-related quality of life and work readiness, and suggest that increasing patients' capacity to work is an achievable and meaningful goal in the treatment of impaired functioning in schizophrenia.