Table 3.

Characteristics of individual studies included in the present meta-analysis

Author	Year	Country	Ethnicity	Sample size		Polymorphisms studied	HWE (p-value)
				Case	Control
The present study	2017	China	Asian	328	449	rs10818488; rs3761847	0.57; 0.61
Moaaz et al. [21]	2016	Egypt	African	105	75	rs10818488	0.23
Fodil et al. [22]	2015	Western Algeria	African	110	196	rs10818488	0.56
Liang et al. [23]	2015	China	Asian	300	300	rs10818488; rs3761847	0.73; 0.84
Ahmadlou et al. [24]	2014	Iran	Asian	362	422	rs10818488	0.58
Fakhfakh et al. [25]	2012	Tunisia	African	108	161	rs10818488	0.42
Mohamed et al. [26]	2012	Egypt	African	172	160	rs10818488	0.10
Danoy et al. [27]	2011	China	Asian	1035	1702	rs3761847	NA
El-Gabalawy et al. [28]	2011	Canada	North American Native	333	490	rs10818488; rs3761847	0.66; 0.66
Zhu et al. [29]	2011	China	Asian	576	689	rs3761847	0.06
Nishimoto et al. (1) [30]	2010	Japan	Asian	1504	752	rs10818488; rs3761847	0.13; 0.18
Nishimoto et al. (2) [30]	2010	Japan	Asian	830	658	rs10818488; rs3761847	0.80; 0.90
Nishimoto et al. (3) [30]	2010	Japan	Asian	1113	940	rs10818488; rs3761847	0.49; 0.60
Nishimoto et al. (4) [30]	2010	Japan	Asian	950	507	rs10818488; rs3761847	0.09; 0.10
Han et al. [31]	2009	Korea	Asian	1301	996	rs3761847	0.48
Stark et al. [32]	2009	Slovakia	European	520	303	rs10818488; rs3761847	0.29; 0.28
Zervou et al. [33]	2008	Greece	European	311	344	rs10818488	0.16
Barton et al. [34]	2008	UK	European	3418	3337	rs10818488; rs3761847	0.35; 0.33
Palomino-Morales et al. [35]	2008	Colombia	Colombian	274	421	rs10818488	0.44
Kurreeman et al. (1) [6]	2007	Netherlands	European	251	241	rs10818488	NA
Kurreeman et al. (2) [6]	2007	Netherlands	European	406	262	rs10818488	NA
Kurreeman et al. (3) [6]	2007	Sweden	European	1500	912	rs10818488	NA
Kurreeman et al. (4) [6]	2007	USA	European	470	469	rs10818488	NA
Plenge et al. (1) [7]	2007	USA	European	863	1182	rs3761847	NA
Plenge et al. (2) [7]	2007	Sweden	European	632	653	rs3761847	NA
Plenge et al. (3) [7]	2007	USA	European	485	1282	rs3761847	NA
Plenge et al. (4) [7]	2007	Sweden	European	568	516	rs3761847	NA
WTCCC [36]	2007	UK	European	1858	2935	rs10818488; rs3761847	0.26; 0.25

HWE – Hardy-Weinberg equilibrium, NA – not available, WTCCC – Wellcome Trust Case Control Consortium