Table 1 The main characteristics of the studies included in the meta-analysis
Author | Year | Country | Ancestor | Source of control group | Mean age of control group | Gender index (case) | Gender index (control) | Case/Control |
|---|---|---|---|---|---|---|---|---|
Rs1006737 | ||||||||
Fatima [11] | 2017 | Pakistani | Caucasian | Population based | 44 | 0.33 | 0.71 | 508/300 |
Lubeiro [20] | 2018 | Spain | Caucasian | Population based | 29.52 | 0.72 | 0.98 | 50/101 |
Mallas [21] | 2016 | Mixed | Mixed | Population based | 35.79 | 0.26 | 0.85 | 63/124 |
Porcelli [22] | 2015 | Korean | Asian | Hospital based | 45.36 | 0.73 | 1.22 | 176/326 |
Ivorra [8] | 2014 | Spain | Caucasian | Mixed | 43.61 | 0.79 | 0.75 | 3063/2847 |
He [15] | 2013 | China | Asian | Population based | 30.6 | 0.53 | 0.86 | 1235/1235 |
Guan [23] | 2013 | China | Asian | Population based | 34.2 | 0.87 | 0.83 | 1430/1570 |
Galaktionova [24] | 2013 | Russia | Caucasian | Population based | 36 | 2.24 | 0.90 | 188/192 |
Zheng [13] | 2013 | China | Asian | Population based | 32.4 | 1.05 | 1.04 | 5893/6319 |
Hori [18] | 2012 | Japan | Asian | Population based | 46 | 0.82 | 1.93 | 552/1132 |
Zhang [25] | 2011 | China | Asian | Population based | 22.3 | 0.49 | 0.60 | 318/401 |
Nyegaard [26] | 2010 | Denmark | Caucasian | Population based | – | – | – | 976/1489 |
Bigos [27] | 2010 | Caucasian | Population based | 33.09 | 0.230 | 1.16 | 282/440 | |
Green [28] | 2009 | UK | Caucasian | Population based | – | 0.47 | 1.04 | 479/2936 |
Rs2007044 | ||||||||
Bustillo [29] | 2017 | United States | Caucasian | Population based | 36 | 0.26 | 0.37 | 53/129 |
Zhang [30] | 2018 | China | Asian | Hospital based | 27.14 | 0.15 | 0.28 | 53/129 |
Rs4765905 | ||||||||
Sudesh [31] | 2018 | India | Indian | Population based | 38.73 | 1.01 | 0.483 | 1005/1069 |