Table 4.
Results of heterogeneity tests among studies.
| Indicator | Heterogeneity | Tau2 | I 2 | |||||
|---|---|---|---|---|---|---|---|---|
| Q | df(Q) | p | I2(level 1) | level 2 | level 3 | level 2 | level 3 | |
| result | 64.039 | 36 | 0.003 | 0% | 0.00 | 0.057 | 0.00% | 52.53% |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.