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.
| Outcome or subgroup title | No. of studies | No. of participants | Statistical method | Effect size |
|---|---|---|---|---|
| 4.1 Global cognitive performance (postintervention) | 11 | 542 | Std. Mean Difference (IV, Fixed, 95% CI) | 0.58 [0.40, 0.76] |
| 4.2 Global cognitive performance (sensitivity analysis, Park 2015 and Chen 2015 removed) | 9 | 432 | Std. Mean Difference (IV, Fixed, 95% CI) | 0.35 [0.16, 0.54] |
