Health care resource use analysis of paliperidone palmitate 3 month injection from two phase 3 clinical trials
OBJECTIVE: The objective of this study was to compare occupational status and health care resource use between treatment groups in clinical trials 3012 (PP3M versus placebo) and 3011 (PP3M versus PP1M).
METHODS: Occupational status was assessed at each study visit. Logistic regressions modeled the probability of hospitalization during the double-blind phase.
RESULTS: At the start of each study, a low percentage of patients were full-time employed or gainfully self-employed (approximately 10% in trial 3012 and 11%-13% in trial 3011). Improvement from baseline in occupational status was slightly higher in the PP3M group than in placebo or PP1M groups. The odds of a hospitalization for psychiatric and social reasons during 1 year was 7.74 (95% CI, 2.39-25.05; p < .001) for a patient on placebo compared with the odds of hospitalization during 1 year for a patient on PP3M. No statistically significant difference was observed between PP3M and PP1M (odds ratio, 1.16; 95% CI, 0.70-1.93). Very similar results were observed for hospitalizations due to psychiatric reasons only, within each trial.
CONCLUSIONS: In both trials, most patients were unemployed and not seeking work or were retired at open-label baseline, and only a small number of patients changed their occupational status during the trials. In trial 3012, subjects who received placebo had significantly higher odds of hospitalization for either psychiatric and social reasons or for psychiatric reasons alone compared with subjects who received PP3M. In contrast, in trial 3011, the odds of hospitalizations were not significantly different between PP3M and PP1M.