The primary aim of this study was to assess the effectiveness of integrated home treatment (IV, i. e. intensive cognitive behavioral therapy and pharmacotherapy provided within a framework of assertive community treatment) in individuals with severe mental disorders (n = 13) within the German healthcare system. A treatment-as-usual group (TAU, n = 13) was identified by propensity score matching. Symptoms (CGI), functioning (GAF) and service engagement (SES) were assessed. Quality of life (MSLQ-R) was rated by the IV patients. A reduction of days spent in hospital [IV: 2.3 (6.1); TAU: 33.6 (53.6); Z = 45; p = 0.044], time to admission (IV: 384 days 95% CI 309 - 459.1; TAU: 234.9 days 95% CI 127.2 - 342.5; log rank: Chi-square = 4.31, p < 0.05), severity of the illness (p < 0.01), positive symptoms (p < 0.001), and cognitive symptoms (p < 0.05), as well as functioning (p < 0.05) and service engagement (p < 0.05) was observed in IV patients. Despite differences on a descriptive level, differences in total admissions (IV: 15.3%; TAU: 53.8%; odds ratio = 0.155, 95% CI 0.0243 - 1.00) were not significant. A methodological limitation is that symptom ratings were not performed by independent and blinded raters.
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