Table 1. Characteristics of studies included in meta-analysis.

Study	publication year	Country	Ethnicity	FTO SNP	Sample size		Mean age(years)		Mean BMI(kg/m2)		OR	95%CI	P HWE a
					cases	controls	cases	controls	cases	controls
Yan et al. [12]	2009	China	East Asian	rs9939609	215	227	21.7	27.5	28.0	20.8	1.39	0.76–2.52	0.36
Hatziagelaki et al.[18]	2012	Germany	Caucasian	rs8050136	62	105	26.0	27.0	27.3	26.6	1.24	0.58–2.64	0.49
Kim et al. [19]	2012	Korea	East Asian	rs1421085	377	386	28.5	28.5	22.2	20.1	1.13	0.47–2.68	0.46
Saxena et al.[5]	2012	USA	Caucasian	rs9939609	525	472	28.4	28.9	30.8	23.5	1.03	0.83–1.28	0.69
Li et al. [16]	2013	China	East Asian	rs9939609	3599	3082	28.4	31.3	24.8	22.7	1.44	1.30–1.60	0.74

OR =  odds ratio, CI =  confidence interval, SNP = single nucleotide polymorphism.

^a P value for Hardy–Weinberg equilibrium test (HWE) in controls.