Table 3.
Quality assessment of included studies
| Study | Selection | Comparability | Outcome | Total | Quality level |
|---|---|---|---|---|---|
| Briganti 2012 | 3 | 2 | 3 | 8 | High |
| Buscariollo 2017 | 3 | 2 | 3 | 8 | High |
| Fossati 2016 | 3 | 1 | 3 | 7 | Moderate |
| Hwang 2018 | 3 | 2 | 2 | 7 | Moderate |
| Borghetti 2017 | 3 | 1 | 2 | 6 | Moderate |
| Hervas 2017 | 3 | 0 | 3 | 6 | Moderate |
| Mishra 2015 | 3 | 2 | 2 | 7 | Moderate |
| Hsu 2015 | 3 | 2 | 3 | 8 | High |
| Tilki 2016 | 3 | 2 | 3 | 8 | High |
| Detti 2012 | 3 | 1 | 3 | 7 | Moderate |
| Ost 2011 | 3 | 2 | 2 | 7 | Moderate |
| Trabulsi 2008 | 3 | 2 | 2 | 7 | Moderate |
| Tsien 2003 | 3 | 1 | 2 | 6 | Moderate |
| Taylor 2003 | 3 | 1 | 2 | 6 | Moderate |
| Kalapurakal 2002 | 3 | 1 | 1 | 5 | Moderate |