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.
Newcastle-Ottawa Scale for studies included in the systematic review
| Author, year (reference) | Subject selection | Comparability of study groups | Assessment of outcome | Total |
|---|---|---|---|---|
| Schillinger, 2002 (8) |
4 |
2 |
3 |
9 |
| AlMahameed, 2010 (15) |
3 |
2 |
3 |
8 |
| Wen, 2013 (16) |
3 |
2 |
3 |
8 |
| Vrsalovic, 2015 (17) |
3 |
2 |
3 |
8 |
| Mori, 2016 (18) | 3 | 2 | 2 | 7 |
