Table 2.
Quality assessment of the studies included in the meta-analysis.
| Articles | Study design | Quality assessment |
|
|---|---|---|---|
| Jadad scale | Newcastle-Ottawa scale | ||
| Kizilkan Y, et al. (2019) | Cohort | - | 8 |
| Al-Mohammady, AA, et al. (2018) | RCT | 1 | - |
| Cantoro U, et al. (2015) | RCT | 1 | - |
| McGarry P, et al. (2015) | Cohort | - | 9 |
| Grasso M, et al. (2014) | Cohort | - | 8 |
| Gokce MI, et al. (2013) | Cohort | - | 9 |
| Zampieri N, et al. (2013) | Cohort | - | 9 |
| Pasqualotto FF, et al. (2011) | Cohort | - | 7 |
| Abdel-Meguid TA, et al. (2011) | RCT | 3 | - |
| Ghanaie MM, et al. (2011) | RCT | 4 | - |
| Giagulli VA, et al. (2011) | RCT | 1 | - |
| Esteves SC, et al. (2010) | Cohort | - | 9 |
| Haydardedeoglu B, et al. (2010) | Cohort | - | 9 |
| Seo JT, et al. (2010) | Cohort | - | 7 |
| Inci K, et al. (2009) | Cohort | - | 8 |
| Zini A, et al. (2008) | Cohort | - | 8 |
| Zini, et al. (2008) | Cohort | - | 8 |
| Boman JM, et al. (2008) | Cohort | - | 8 |
| Schlegel PN, et al. (2004) | Case-control | - | 8 |
| Krause W, et al. (2002) | RCT | 3 | - |
| Daitch JA, et al. (2001) | Cohort | - | 6 |
| Unal D, et al. (2001) | RCT | 3 | - |
| Grasso M, et al. (2000) | RCT | 3 | - |
| Nieschlag E, et al. (1998) | RCT | 3 | - |
| Yamamoto M, et al. (1996) | RCT | 2 | - |
| Madgar I, et al. (1995) | RCT | 3 | - |
| Breznik R, et al. (1993) | RCT | 3 | - |
| Marmar JL, et al. (1992) | Cohort | - | 8 |
| Ashkenazi J, et al. (1989) | Cohort | - | 5 |
| Vermeulen A, et al. (1984) | RCT | 1 | - |
| Nilsson S, et al. (1979) | RCT | 3 | - |
RCT, Randomized Controlled Trials.