Random-Effects Model (k = 5; tau^2 estimator: REML)

tau^2 (estimated amount of total heterogeneity): 31.6502 (SE = 38.6558)
tau (square root of estimated tau^2 value):      5.6259
I^2 (total heterogeneity / total variability):   66.45%
H^2 (total variability / sampling variability):  2.98

Test for Heterogeneity: 
Q(df = 4) = 12.5889, p-val = 0.0135

Model Results:

estimate       se     zval     pval    ci.lb    ci.ub          
-70.5131   3.3915 -20.7910   <.0001 -77.1604 -63.8659      *** 

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