Random-Effects Model (k = 3; tau^2 estimator: REML)

tau^2 (estimated amount of total heterogeneity): 441.4737 (SE = 731.4499)
tau (square root of estimated tau^2 value):      21.0113
I^2 (total heterogeneity / total variability):   65.01%
H^2 (total variability / sampling variability):  2.86

Test for Heterogeneity: 
Q(df = 2) = 5.5467, p-val = 0.0625

Model Results:

estimate       se     zval     pval    ci.lb    ci.ub          
-66.5839  15.5054  -4.2943   <.0001 -96.9738 -36.1939      *** 

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Signif. codes:  0 *** 0.001 ** 0.01 * 0.05 . 0.1   1 
