Random-effects model for pooling data.
Model | N of studies | Effect size and 95% interval | Test of null (2-tail) | Heterogeneity | Tau-squared | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Point estimate | Lower limit | Upper limit | z-value | q-value | df (Q) | I-squared | Tau squared | Standard error | Variance | Tau | |||||||
Fixed | 6 | 6.013 | 3.833 | 9.435 | 7.806 | 0.000 | 42.809 | 5 | 0.000 | 88.320 | 2.674 | 2.290 | 5.244 | 1.635 | |||
Random | 6 | 8.830 | 2.033 | 38.355 | 2.907 | 0.004 |