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.
Included articles methods and quality appraisals (n=19)
| Characteristic | No. |
|---|---|
| Research method employed | |
| Quasi-experimental | 3 |
| Non-experimental | 13 |
| Mixed methods | 1 |
| Qualitative | 2 |
| Quality score | |
| A: Comprehensive literature reviews, sufficient sample sizes, and generalizable results | 6 |
| B: Supporting literature reviews, sufficient sample sizes, but not broadly generalizable results | 12 |
| C: Little evidence and inconsistent results | 1 |
