Intent-to-treat analyses used mixed modeling to compare clinical outcomes in the telephone monitoring and usual care groups and 4 and 12 months after discharge. Survival analysis was used to compare conditions on time to rehospitalization. Having a slightly smaller-than-intended sample size resulted in modest reductions in statistical power, e.g., power to detect the expected d = .25 effect on PTSD outcomes was reduced from about 90% to 82%, and power to detect the anticipated W = .105 difference in rehospitalization rates was reduced from 88% to 85%. Secondary analyses assessed whether differences in outcomes between the telephone case monitoring and usual care groups were mediated by attending more outpatient visits and completing more medication refills. Exploratory analyses examined whether the effect of telephone support on the clinical outcome measures, number of treatment visits, and medication refills was moderated by number of outpatient mental health visits in the prior year, distance from clinic, treatment expectancies, therapeutic alliance, or co-occurring substance use problems.