“…Pooled analysis was performed for 11 studies that provided relevant statistics (Figure 4A,B). 36,37,39,41,45,48,51,55,56,58,59 The pooled statistical analysis of these studies 36,37,39,41,45,48,51,55,56,58,59 with a total of 1097 participants showed that PEI was significantly superior to other standard interventions in improving caregiver's QoL (SMD 0.59, 95% CI 0.24–0.93; p = 0.0009; I 2 = 87%) in the immediate post‐intervention period (Figure 4A). The pooled effect of six studies 36,37,41,56,58,59 showed a significant small effect on caregiver's QoL (SMD 0.39, 95% CI = −0.00–0.77, p = 0.05; I 2 = 81%) in the long‐term follow‐up usually from 4 weeks to 8 months (Figure 4B).…”