Table 2 The literature quality and risk of bias assessment of non-randomized studies by Newcastle-Ottawa scale form.
Author (Year) | Selection | Comparability | Outcome | Total | |||||
|---|---|---|---|---|---|---|---|---|---|
A representative of the exposed cohort | Selection of external control | Ascertainment of exposure | Outcomes not present at the start | Comparability on design or analysis | Outcome assessment | Enough follow-up visit time | Adequacy of follow-up of cohorts | ||
Diss A (2008) | ★ | 0 | ★ | ★ | ★0 | ★ | ★ | ★ | 7/9 |
Schleier P (2008) | ★ | 0 | ★ | ★ | ★0 | ★ | ★ | ★ | 7/9 |
Siovio T (2011) | ★ | 0 | ★ | ★ | ★★ | ★ | ★ | ★ | 8/9 |
Fermergard (2012) | ★ | 0 | ★ | ★ | ★0 | ★ | ★ | ★ | 8/9 |
He L(2012) | ★ | 0 | ★ | ★ | ★★ | ★ | 0 | ★ | 7/9 |
Vople S (2013) | ★ | 0 | ★ | ★ | ★0 | ★ | ★ | ★ | 7/9 |
Brizeula A (2014) | ★ | 0 | ★ | ★ | ★★ | ★ | ★ | ★ | 8/9 |
Kim J M (2014) | ★ | 0 | ★ | ★ | ★0 | ★ | ★ | ★ | 7/9 |
Stiovio T (2014) | ★ | 0 | ★ | ★ | ★0 | ★ | ★ | ★ | 7/9 |
Anitua.E (2015) | ★ | 0 | ★ | ★ | ★★ | 0 | ★ | ★ | 7/9 |
Spinelli.D (2015) | ★ | 0 | ★ | ★ | ★★ | ★ | ★ | ★ | 8/9 |
Gu Y X (2016) | ★ | 0 | ★ | ★ | ★0 | ★ | ★ | ★ | 7/9 |
Nedir R (2016) | ★ | 0 | ★ | ★ | ★★ | ★ | ★ | ★ | 8/9 |
Si M S (2016) | ★ | 0 | ★ | ★ | ★0 | ★ | ★ | ★ | 7/9 |
Caban J (2017) | ★ | 0 | ★ | ★ | ★0 | ★ | ★ | ★ | 7/9 |
