Table 3.
Meta-regression analysis of factors affecting between-study heterogeneity.
| Heterogeneity source | Coefficient’s | Standard error | p-value |
|---|---|---|---|
| Sample size | 3.6 | .3 | .000 |
| Age of target population | 4.1 | .5 | .000 |
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.