highly significantp < 0.001
A highly significant overall level of significance ( p < 0.001) was found for the meta-analysis, and a high degree of heterogeneity ( I 2 = 96%, p < 0.001) was observed among the studies selected ( Figure 2 ).
A highly significant overall level of significance ( p < 0.001) was found for the meta-analysis, and a high degree of heterogeneity ( I 2 = 96%, p < 0.001) was observed among the studies selected ( Figure 2 ).