Table 2 Characteristics of primary studies
Author | Location | Type study | Case sample size | Control sample size |
|---|---|---|---|---|
G S Ozler (2014) [14] | Turkey | case control | 25 | 25 |
Nabiha Farasat Khan (2013) [15] | Pakistan | case control | 60 | 60 |
Pia Lopez-Jornet(2014) [16] | Spain | case control | 92 | 94 |
Kamran Sari (2016) [17] | Turkey | case control | 195 | 217 |
Zuzanna Slebioda (2018) [18] | Poland | case control | 71 | 70 |
Moin Sabeer Tidgundi(2017) [19] | India | case control | 64 | 60 |
Zuzanna Åšlebioda (2017) [20] | Poland | case control | 75 | 72 |
Funda Tamer (2019) [21] | Turkey | case control | 20 | 20 |
Vandana Sharma (2022) [22] | India | case control | 50 | 50 |
Subhasish Mustafi (2021) [23] | India | case control | 40 | 40 |
Song€ul Yılmaz (2020) [24] | Turkey | case control | 108 | 57 |
Saime Sagiroglu (2018) [25] | Turkey | case control | 175 | 175 |
Hatice Kaya Ozden (2021) [26] | Turkey | case control | 81 | 69 |
Samar Z. Burgan(2006) [27] | Jordan | case control | 143 | 143 |
Nurdiana, Pocut Astari (2018) [4] | Indonesia | case control | 59 | 60 |
Zhe-Xuan Bao (2017) [28] | China | case control | 517 | 187 |
Shaheen Ali Ahmed (2021) [29] | Erbil | case control | 50 | 50 |
Suhail H. Al-Amad (2019) [30] | Sharjah United Arab Emirates | case control | 52 | 52 |
Noor S. Mohammed Ali (2022) [31] | Baghdad | case control | 30 | 30 |
Fateme Arbabi-Kalati (2014) [32] | Iran | case control | 30 | 30 |
Neda Babaee (2015) [33] | Iran | case control | 28 | 28 |
Andy Sun (2014) [34] | Taiwan | case control | 273 | 273 |