METHODS: This retrospective, observational, population-based study used the Japan Medical Data Center (JMDC) health insurance claims database to identify patients having schizophrenia before or on the day of the first LAI AP prescription (index date), and receiving LAI AP between April 1, 2012 and December 31, 2019. The number of all-cause, psychiatric-, and schizophrenia-related hospitalizations at baseline (365 days before index date) and during the 1-year follow-up period were evaluated.

RESULTS: Of the 1692 patients who received LAI AP during the study period, 146 were included (employed: 55 [37.7 %]; dependent: 91 [62.3 %]). The mean age was 37 years; 50.7 % (n = 74) were females. During baseline period, 61 (41.8 %) patients were not hospitalized. During the follow-up period, 67 (45.9 %) patients underwent hospitalization ≤ 7 days; all-cause: 100 (68.7 %); psychiatry-related: 104 (76.2 %); schizophrenia-related: 114 (78.1 %). A higher proportion of patients were hospitalization-free during the follow-up in the employed vs. dependent population: all cause: 69.1 % vs. 61.5 %; psychiatric-related 76.4 % vs. 67.0 %, schizophrenia-related: 87.3 % vs. 71.4 %.

METHODS: A randomized, double-blind, placebo-controlled trial was conducted among 100 HIV+ prisoners with AUDs. Participants were randomized 2:1 to receive 6 monthly injections of XR-NTX or placebo starting one week prior to release. Using multiple imputation strategies for data missing completely at random, data were analyzed for the 6-month post-incarceration period. Main outcomes included: time to first heavy drinking day; number of standardized drinks/drinking day; percent of heavy drinking days; pre- to post-incarceration change in average drinks/day; total number of drinking days; and a composite alcohol improvement score comprised of all 5 parameters.

RESULTS: There was no statistically significant difference overall between treatment arms for time-to-heavy-drinking day. However, participants aged 20-29 years who received XR-NTX had a longer time to first heavy drinking day compared to the placebo group (24.1 vs. 9.5days; p<0.001). There were no statistically significant differences between groups for other individual drinking outcomes. A sub-analysis, however, found participants who received ≥4 XR-NTX were more likely (p<0.005) to have improved composite alcohol scores than the placebo group. Post-hoc power analysis revealed that despite the study being powered for HIV outcomes, sufficient power (0.94) was available to distinguish the observed differences.