Table V.
Zero-effect test rejecting the null hypothesis.
| Testa | Null vs. alternative | Measure | Df | χ2 | Prob level |
|---|---|---|---|---|---|
| Non-directional | H0: all treatment effects are zero | ln (RR) | 11 | 106.11 | 0.0000 |
| Ha: at least one is not zero | |||||
| Directional | H0: all treatment effects are zero | ln (RR) | 1 | 93.46 | 0.0000 |
| Ha: effects are equal to the same non-zero quantity |
a
Manual calculation of test statistics based on ln (RR) and SE ln (RR) output from Comprehensive Meta-Analysis, version 2.0. Df, degree of freedom; RR, risk ratio; SE, standard error.