Table 1 Characteristics of included studies
Author, year | Language | Country | Ethnicity | Sample size (M/F) | Age | Genotype method | NOS score | ||
|---|---|---|---|---|---|---|---|---|---|
Case | Control | Case | Control | ||||||
Hofner et al., 2006 | English | Hungary | Caucasion | 92(NA/NA) | 200(NA/NA) | NA | NA | PCR | 5 |
Li et al., 2007 | Chinese | China | Asian | 71 (33/38) | 70 (39/31) | 46.3 ± 14.3 | 48.9 ± 15.1 | PCR | 4 |
Chen and Nie, 2008 | English | China | Asian | 101 (60/41) | 120 (71/49) | 51.57 ± 13.39 | 51.05 ± 9.37 | PCR | 6 |
Cao and Xiao, 2010 | Chinese | China | Asian | 119 (57/62) | 236 (130/106) | 46.1 ± 13.8 | 38.8 ± 6.7 | PCR | 4 |
Tang et al., 2010 | Chinese | China | Asian | 170(NA/NA) | 132 (65/67) | NA | NA | PCR | 4 |
Chantsev and Leonov, 2014 | Russian | Russia | Caucasion | 100(NA/NA) | 100(NA/NA) | NA | NA | PCR | 4 |
Li et al., 2015 | English | China | Asian | 176 (115/61) | 176 (115/61) | 51.6 ± 11.3 | 52.3 ± 10.9 | PCR | 6 |
Bao et al., 2015 | English | China | Asian | 335 (205/130) | 335 (205/130) | NA | NA | PCR | 6 |
Anilir et al., 2017 | English | Turkey | Caucasion | 176(NA/NA) | 100(NA/NA) | NA | NA | PCR | 6 |
Bishu et al., 2018 | English | USA | Mixed | 357 (178/179) | 347 (135/212) | 52 ± 19 | 54 ± NA | PCR | 6 |