Treatment effectiveness of intimate partner violence perpetration among patients in a drug addiction program

Objective: This article evaluates the treatment effectiveness of an integrated intervention compared to addiction treatment as usual (TAU) in reducing intimate partner violence perpetration (IPV-P) among patients in a drug-addiction intervention programme. Method: A parallel, randomized, controlled trial was carried out with repeated measures of assessment (pre-treatment, post-treatment and 6-month follow-up). A sample of 227 consecutive patients was assessed, and 70 patients with IPV-P were selected to participate in the study and then divided into two groups: treatment (n = 34) and control (n = 36). The treatment group participated in an integrated intervention programme for addiction and IPV-P, and the control group received the TAU without intervention for IPV-P. Treatment success was defined as the complete absence of IPV-P episodes, both physical and psychological. Results: At the follow-up, the patients in the treatment group showed an IPV-P success rate (60.7%) that was significantly higher (X2 = 3.85; p < .05) than that of the patients in the control group (31.6%). Moreover, both groups achieved statistically significant improvements in associated variables. Conclusions: The presence of IPV-P should be assessed in drug addiction treatment programmes. The combined treatment for addiction and IPV-P seems to be effective. This project was supported by a grant (code PSI2009-08500) from the “Ministerio de Ciencia e Innovación” of the Spanish Government.