Table 2.
Newcastle-Ottawa Scale for assessing the quality of nonrandomized studies.
| First author | Year of publication | Selection | Score (Stars) Comparability | Outcome | Total Score |
|---|---|---|---|---|---|
| Petrikova (14) | 2015 | ★★★★ | ★ | ★★★ | 8 |
| Janssen (15) | 2004 | ★★★★ | ★ | ★★★ | 8 |
| Kachuei (16) | 2012 | ★★★★ | ★★ | ★★★ | 9 |
| Petríková (17) | 2012 | ★★★★ | ★★ | ★★★ | 9 |
| Sinha (18) | 2013 | ★★★★ | ★★ | ★★★ | 9 |
| Garelli (19) | 2013 | ★★★★ | ★ | ★★★ | 9 |
| Novais (20) | 2015 | ★★★★ | ★★★ | 7 | |
| Duran (21) | 2015 | ★★★★ | ★ | ★★★ | 8 |
| Arduc (22) | 2015 | ★★★★ | ★★ | ★★★ | 9 |
| Calvar (23) | 2015 | ★★★★ | ★★ | ★★★ | 9 |
| Yu (24) | 2016 | ★★★★ | ★★ | ★★★ | 9 |
| Yasar (25) | 2016 | ★★★★ | ★★ | ★★★ | 9 |
| Arora (26) | 2016 | ★★★★ | ★ | ★★★ | 8 |
| Adamska (27) | 2020 | ★★★★ | ★ | ★★★ | 8 |
| Kim (28) | 2022 | ★★★★ | ★ | ★★★ | 8 |
| Skrzynska (29) | 2022 | ★★★★ | ★★ | ★★★ | 9 |
| Al-Saab (30) | 2014 | ★★★★ | ★★ | ★★★ | 9 |
| Karaköse (31) | 2017 | ★★★★ | ★★ | ★★★ | 9 |
| Ganie (32) | 2010 | ★★★★ | ★★ | ★★★ | 9 |
| Ho (33) | 2020 | ★★★★ | ★ | ★★★ | 8 |
“★” means 1 point, the higher the number of “★” means the better the quality.