Cyclin D1 G870A Polymorphism and Risk of Nasopharyngeal Carcinoma: A Meta-Analysis

Table 1

Characteristics of the studies included in the meta-analysis.

First author	Year	Country	Ethnicity	Genotyping method	Genotype distribution						𝑃 for HWE^a	References
					Case			Control
					GG	GA	AA	GG	GA	AA
Catarino	2008	Portugal	European	PCR-RFLP	23	40	21	40	138	69	0.036	[17]
Catarino	2006	Portugal	European	PCR-RFLP	26	42	26	28	105	54	0.047	[18]
Deng	2002	China (mainland)	Asian	DHPLC	19	48	17	14	42	35	0.811	[19]
Shih	2012	China (Taiwan)	Asian	PCR-RFLP	23	86	67	28	105	43	0.007	[20]
Sui	2009	China (mainland)	Asian	PCR-RFLP	60	110	71	115	124	33	0.962	[21]

aHWE in controls.