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.
Quality assessment criteria
| Study ID | QA1 | QA2 | QA3 | QA4 | QA5 | Total | Include/exclude |
|---|---|---|---|---|---|---|---|
| 1 | 1 | 1 | 1 | 1 | 1 | 5 | Include |
| 2 | 1 | 1 | 1 | 1 | 1 | 5 | Include |
| 3 | 1 | 1 | 0.5 | 1 | 1 | 4.5 | Include |
| 4 | 0.5 | 1 | 0.5 | 1 | 1 | 4 | Include |
| 5 | 1 | 0.5 | 0.5 | 0.5 | 1 | 3.5 | Include |
| 6 | 1 | 1 | 1 | 1 | 1 | 1 | Include |
| 7 | 1 | 0.5 | 0.5 | 0 | 0.5 | 2.5 | exclude |
