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

tau^2 (estimated amount of total heterogeneity): 37.8346 (SE = 116.8959)
tau (square root of estimated tau^2 value):      6.1510
I^2 (total heterogeneity / total variability):   45.77%
H^2 (total variability / sampling variability):  1.84

Test for Heterogeneity: 
Q(df = 1) = 1.8441, p-val = 0.1745

Model Results:

estimate       se     zval     pval    ci.lb    ci.ub          
-27.6066   6.1854  -4.4632   <.0001 -39.7297 -15.4834      *** 

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