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Table 1 Characteristics of randomized controlled trials examining the effect of cognitive behaviour group therapy

From: Cognitive behavioural group therapy for male perpetrators of intimate partner violence: a systematic review

Study, year, country Setting Population (N, mean age) Intervention Control condition Outcome definition Length of follow-up Results: primary outcome
Alexander et al. [26], 2010,
United States
Community setting serving victims and perpetrators of domestic violence Male perpetrators (96.1% court-ordered) (N = 528, mean age 34.18 years) Motivational Interviewing combined with Cognitive behavioural group therapy (SOCMI) 26 weeks Cognitive behavioural group therapy (gender re-education), 26 weeks CTS2, (psychological and physical aggression) Perpetrator performed self-reports at 26 weeks’ post-treatment. Partner assessments were performed at 6 and 12 months No changes in self-reported violence. Significant reductions in partner reports of physical violence at follow-up in the SOCMI group
Murphy et al. [28], 2017, United States A community-based domestic violence agency Male perpetrators (N = 42, mean age 34.38 years) Cognitive behavioural therapy, 20 individual sessions (ICBT) Cognitive behavioural group
therapy (CBGT), 20 weekly 2-h sessions
CTS2
(physical, psychological aggression, emotional abuse, relationship adjustment)
Perpetrator and partner performed self-reports at baseline and 3, 6, 9 and 12 months after baseline CBGT produced equivalent or greater benefits than ICBT. Significant reductions in self-reported violence across conditions, with no between condition differences. Partner reports revealed more favourable outcomes for group treatment on measures of physical and psychological violence
Palmstierna et al. [25], 2012, Norway Specialised outpatient mental health service Male perpetrators voluntarily seeking therapy (N = 26, mean age 35.00 years) Cognitive behavioural group therapy.
15 weeks 2 h sessions
Waiting list CTS extended version (physical, material, any violence, verbal aggression) Assessment after 15 weeks of treatment and after 15 weeks on waiting list as compared to baseline assessment Significant reductions in self-reported violence in treatment group as compared to the waiting list group
Taft et al. [29], 2016, United States Veteran Affairs hospitals Clinician-referrals, self-referrals, court-referrals Male perpetrators; military veterans or service members (N = 135, mean age 37.85 years) Cognitive behavioural group therapy, 12 weekly 2 h sessions (trauma-informed group intervention) Treatment as usual CTS2 (physical assault, psychological aggression)
MINI,
CAPS,
MMEA
Perpetrators performed self-reports at baseline and 3 and 6 months after baseline.
Partner assessments were performed at baseline and after 3 and 6 months
Significantly greater reductions in reported physical and psychologically intimate partner violence in the intervention group, self- and partner reports combined
  1. CTS2 Conflict Tactics Scales–Revised, CTS Conflict Tactics Scales extended version, MINI The Mini-International Neuropsychiatric Interview, CAPS The Clinician-Administered PTSD Scale, MMEA Multidimensional Measure of Emotional Abuse. CBGT Cognitive Behaviour Group Therapy, ICBT Individual Cognitive Behaviour Therapy, SOCMI Stages-Of-Change Motivational Interviewing