a trend towards significancep = 0.06
The meta-analysis for the BOP and PD subgroups showed the highest statistical significance ( p < 0.00001 and p = 0.0003, respectively), with considerable heterogeneity (I 2 = 97% and 84% respectively) and a trend towards significance for the MBL subgroup ( p = 0.06), although with moderate heterogeneity (I 2 = 59%) ( Figures 2 – 5 ).