highly significantP < .0001
Moderators of Disengagement Rates Meta-regression analysis ( figure 2C ) found earlier studies to be significant and negatively correlated with disengagement rates (QM(1) = 6.80, P < .01) accounting for almost a third of the heterogeneity (R 2 = 31.65%, QE(13) = 173.23, P < .0001), this increases to a slightly stronger and highly significant effect (QM(1) = 18.21, P < .0001) when an influential case (Z = 2.13) 7 is removed (R2 = 65.85%, QE(12) = 87.15, P < .0001) see figure 2C , case number 10.