Richard A. Bryant, Brandon A. Kohrt, Elizabeth L. Turner, Xueqi Wang, Mark J. D. Jordans, Edith van't Hof, Renasha Ghimire, Nagendra P. Luitel, Pragya Shrestha, Katie S. Dawson, Mark van Ommeren, Manaswi Sangraula, and Kedar Marahatta
Background Globally, 235 million people are impacted by humanitarian emergencies worldwide, presenting increased risk of experiencing a mental disorder. Our objective was to test the effectiveness of a brief group psychological treatment delivered by trained facilitators without prior professional mental health training in a disaster-prone setting. Methods and findings We conducted a cluster randomized controlled trial (cRCT) from November 25, 2018 through September 30, 2019. Participants in both arms were assessed at baseline, midline (7 weeks post-baseline, which was approximately 1 week after treatment in the experimental arm), and endline (20 weeks post-baseline, which was approximately 3 months posttreatment). The intervention was Group Problem Management Plus (PM+), a psychological treatment of 5 weekly sessions, which was compared with enhanced usual care (EUC) consisting of a family psychoeducation meeting with a referral option to primary care providers trained in mental healthcare. The setting was 72 wards (geographic unit of clustering) in eastern Nepal, with 1 PM+ group per ward in the treatment arm. Wards were eligible if they were in disaster-prone regions and residents spoke Nepali. Wards were assigned to study arms based on covariate constrained randomization. Eligible participants were adult women and men 18 years of age and older who met screening criteria for psychological distress and functional impairment. Outcomes were measured at the participant level, with assessors blinded to group assignment. The primary outcome was psychological distress assessed with the General Health Questionnaire (GHQ-12). Secondary outcomes included depression symptoms, posttraumatic stress disorder (PTSD) symptoms, “heart–mind” problems, social support, somatic symptoms, and functional impairment. The hypothesized mediator was skill use aligned with the treatment’s mechanisms of action. A total of 324 participants were enrolled in the control arm (36 wards) and 319 in the Group PM+ arm (36 wards). The overall sample (N = 611) had a median age of 45 years (range 18–91 years), 82% of participants were female, 50% had recently experienced a natural disaster, and 31% had a chronic physical illness. Endline assessments were completed by 302 participants in the control arm (36 wards) and 303 participants in the Group PM+ arm (36 wards). At the midline assessment (immediately after Group PM+ in the experimental arm), mean GHQ-12 total score was 2.7 units lower in Group PM+ compared to control (95% CI: 1.7, 3.7, p < 0.001), with standardized mean difference (SMD) of −0.4 (95% CI: −0.5, −0.2). At 3 months posttreatment (primary endpoint), mean GHQ-12 total score was 1.4 units lower in Group PM+ compared to control (95% CI: 0.3, 2.5, p = 0.014), with SMD of −0.2 (95% CI: −0.4, 0.0). Among the secondary outcomes, Group PM+ was associated with endline with a larger proportion attaining more than 50% reduction in depression symptoms (29.9% of Group PM+ arm versus 17.3% of control arm, risk ratio = 1.7, 95% CI: 1.2, 2.4, p = 0.002). Fewer participants in the Group PM+ arm continued to have “heart–mind” problems at endline (58.8%) compared to the control arm (69.4%), risk ratio = 0.8 (95% CI, 0.7, 1.0, p = 0.042). Group PM+ was not associated with lower PTSD symptoms or functional impairment. Use of psychosocial skills at midline was estimated to explain 31% of the PM+ effect on endline GHQ-12 scores. Adverse events in the control arm included 1 suicide death and 1 reportable incidence of domestic violence; in the Group PM+ arm, there was 1 death due to physical illness. Study limitations include lack of power to evaluate gender-specific effects, lack of long-term outcomes (e.g., 12 months posttreatment), and lack of cost-effectiveness information. Conclusions In this study, we found that a 5-session group psychological treatment delivered by nonspecialists modestly reduced psychological distress and depression symptoms in a setting prone to humanitarian emergencies. Benefits were partly explained by the degree of psychosocial skill use in daily life. To improve the treatment benefit, future implementation should focus on approaches to enhance skill use by PM+ participants. Trial registration ClinicalTrials.gov NCT03747055., Mark Jordans and co-workers evaluate a group therapy intervention in adults affected by psychological distress in Nepal., Author summary Why was this study done? Millions of people worldwide are affected by humanitarian emergencies such as war, environmental disasters, and pandemics. Most populations in these settings lack access to mental health services. In prior studies, people who are not mental health specialists have been trained to effectively deliver psychological treatments, including Problem Management Plus (PM+), which is a brief 5-session intervention. However, there has only been one prior study of a group-based format of PM+ delivered by nonspecialists. As the use of nonspecialists increases, there are new questions about how these psychological interventions work when delivered by someone who is not a mental health professional. Studying potential mechanisms of action (i.e., how the intervention works) could be instrumental to increasing effectiveness when scaling up. What did the researchers do and find? The researchers evaluated the effectiveness of Group PM+ in a setting prone to humanitarian emergencies with delivery of the intervention by briefly trained nonspecialists, and the researchers evaluated a potential mechanism of action involved in reducing psychological distress. Adults who received Group PM+ delivered by nonspecialists in their communities showed greater reduction in psychological distress at 3 months after the intervention compared to adults who had been offered referral options for services. At 3 months after the intervention, approximately 1 out of 3 adults in Group PM+ had a 50% reduction in depression symptoms compared to 1 out of 6 who were in the control arm receiving referral options for services. Regarding how the intervention produced changes, a third of the differences between study arms was explained by participants’ use of psychosocial skills taught in Group PM+, such as breathing exercises, problem-solving techniques, and seeking social support. What do these findings mean? In humanitarian emergencies with a lack of mental health specialists, a 5-session group psychological treatment delivered by nonspecialists can be used to modestly reduce psychological distress and depression symptoms. The benefits of Group PM+ are partly explained by the degree of psychosocial skill use being promoted through the intervention. Therefore, future use of the intervention should explore how to enhance practice of these skills in daily life. Further research is needed to evaluate how the impact of Group PM+ differs by gender because the study points toward potentially less benefit among men compared to women.