Figure 2: The results of the meta-analysis, using forest plots, combing the three clinical studies for moderate or high perceived stress (left panel) and moderate or severe depression (right panel). The study by Adams et al.^[31]combined stress and depression, so the data are repeated in both panels. The meta-analysis was performed using Comprehensive Meta-Analysis (Biostat Inc., NJ, USA). The relative weight of the contribution of each study is provided. For moderate or high perceived stress, study heterogeneity in the meta-analysis was evident because of the study by Adams et al.^[31] For perceived stress, Cochrane's Q was 19.9; P < 0.001, I² = 90.0, and Tau² = 1.16 + 1.62 (SEM). Removing the study of Adams et al. minimized the possibility of heterogeneity with a Cochrane Q = 3.23, P = 0.072. For depression, Cochrane's Q was 19.0; P < 0.001, I² = 89.5, and Tau² = 1.9 + 2.5 (SEM). Removing the study of Adams et al.^[31] eliminated the heterogeneity Q = 0.058, P = 0.8. SEM: Standard error of the mean