ABSTRACT
Introduction: Informal caregivers of people with a mental illness are at increased risk of developing depression, anxiety, and stress, so preventive interventions are needed. Method: The review was reported in PROSPERO (ID: CRD42018094454). The PsycINFO, PubMed, and Scopus databases were searched in June 2019. The Cochrane Risk of Bias and Jadad scale scores were used to assess study quality. Inclusion criteria were: RCTs of informal caregiver interventions regardless of the care receiver's mental illness and intervention modality. Interventions should be compared to a waitlist, treatment as usual or active control, taught in real-time by a mental health professional, include an outcome measure on psychological distress, and published in a peer-reviewed journal article in English. RCTs were excluded if the intervention was given in dyads (caregiver + care receiver), limited to the provision of respite care where the patient sample included a mix of both physical and psychological illnesses, unpublished, not peer-reviewed, study protocols, or dissertations. Results: A total of 2,148 studies were identified; of these, 44 RCT studies met the inclusion criteria, and 31 had sufficient data to conduct a meta-analysis including subgroup analysis (N = 1,899). The systematic review showed that thirty-one out of the 44 RCTs had an effect of the intervention on decreasing psychological distress. The results of the meta-analysis, which included informal caregiver interventions, compared to waitlist, treatment as usual, or active control, regardless of care-receiver mental illness or intervention modality showed a small effect of -0.32 (95% CI -0.53 to -0.11). The heterogeneity of the included studies was high (I 2 = 78). The subgroup analysis included manualized interventions lasting at least 8 weeks and the subgroup analysis that included an active control showed a small effect and low heterogeneity. Lack of active control and long-term follow-up is a limitation of most of the studies. Conclusion: The evidence supports that several interventions improve the mental health of caregivers. Manualized interventions ≥ 8 weeks with active participation are most effective. Future RCTs should improve methodology, and research should investigate which intervention modality is most effective for what kind of caregiver. Future research should clearly specify what the included intervention components are, use longer follow-up times, and conduct mediational analyses to better understand what mechanisms create the effect of an intervention. Systematic review registration: Identifier: CRD42018094454.
ABSTRACT
Background: There is a paucity of research on mediators of change, within compassion training programs. The aim was to investigate the mediators, of an 8-week compassion cultivation training (CCT) program, on the effect of psychological distress on caregivers of people with a mental illness. Method: Longitudinal path models in a randomized controlled trial (RCT). One hundred ninety-two participants were assessed for eligibility, and 161 participants were included into the trial and randomized. The main outcome was psychological distress measured by the Depression, Anxiety and Stress scale at 6 months. Mediators included self-compassion (SC), mindfulness (FM), emotion regulation (ER), emotion suppression (ES), and cognitive reappraisal (CR). Baseline, post, and 3- and 6-month follow-up measurements were collected. Results: The mediated effects for CCT are as follows: depression at 6 months: SC: -1.81 (95% CI: -3.31 to -0.31); FM: -1.98 (95% CI: -3.65 to -0.33); ER: -0.14 (95% CI: -1.31 to 1.02); anxiety at 6 months: SC: -0.71 (95% CI: -1.82 to 0.40); FM: -1.24 (95% CI: -2.39 to -0.09); ER: 0.18 (95% CI: -1.04 to 1.40); stress at 6 months: SC: -1.44 (95% CI: -2.84 to -0.05); FM: -2.17 (95% CI: -3.63 to -0.71); ER: -0.27 (95% CI: -1.51 to 0.98). Conclusion: Mindfulness and self-compassion are important components in reducing psychological distress experienced by informal caregivers of people with a mental illness. Results contribute to the knowledge about the underlying mechanisms of CCT.
ABSTRACT
Importance: Caregivers of people with mental illness are at increased risk of developing depression, anxiety, and stress. Objective: To investigate the effect of a compassion cultivation training (CCT) program on decreasing caregiver psychological distress. Design, Setting, and Participants: This waitlist-controlled randomized clinical trial was conducted in 2 different community settings in Denmark. Caregivers were excluded if they had a diagnosed and untreated mental illness, addiction, meditation practice, or current psychotherapeutic treatment. Enrollment occurred between May 2018 and March 2019. A repeated measurement model was used to examine the impact of the intervention. The primary analysis was based on the intention-to-treat principle. Data analysis was conducted from June 4 to July 7, 2020. Interventions: Participants were randomized 1-to-1 to an 8-week CCT course or waitlist control. Block randomization was used with 40 participants in each block. Main Outcomes and Measures: The main outcome was reduction in psychological distress, as measured by the Depression, Anxiety, Stress Scale (DASS). Baseline, postintervention, and 3- and 6-month follow-up measurements were collected. Results: Among 192 participants assessed for eligibility, 161 participants were included in the study (mean [SD] age, 52.6 [12.5] years; 142 [88.2%] women), with 79 participants randomized to the CCT intervention and 82 participants in the waitlist control group. At baseline, the mean (SD) DASS scores for the intervention vs control groups were 10.89 (8.66) vs 10.80 (8.38) for depression, 6.89 (6.48) vs 6.68 (5.33) for anxiety, and 14.96 (7.90) vs 15.77 (7.40) for stress. The CCT group experienced statistically significant improvement in the primary outcome in mean change from baseline vs the control group at postintervention (adjusted mean difference: depression, -4.16 [95% CI, -6.75 to -1.58]; P = .002; anxiety, -2.24 [95% CI, -3.99 to -0.48]; P = .01; stress, -4.20 [95% CI, -6.73 to -1.67]; P = .001), the 3-month follow-up (adjusted mean difference: depression, -3.78 [95% CI, -6.40 to -1.17]; P = .005; anxiety, -2.50 [95% CI, -4.27 to -0.73]; P = .006; stress, -3.76 [95% CI, -6.32 to -1.21]; P = .004), and the 6-month follow-up (adjusted mean difference: depression: -4.24 [95% CI, -6.97 to -1.52]; P = .002; anxiety, -2.12 [95% CI, -3.96 to -0.29]; P = .02; stress: -3.79 [95% CI, -6.44 to -1.13]; P = .005). Conclusions and Relevance: These findings suggest that CCT was superior to the waitlist control in supporting caregivers' mental health. Statistically and clinically significant reductions in psychological distress were found and sustained at the 6-month follow-up. The improvements noted in this randomized clinical trial could serve to encourage implementation of future evidence-based programs for caregivers. Trial Registration: ClinicalTrials.gov Identifier: NCT03730155.
