Cyclooxygenase-2 polymorphisms and susceptibility to gastric carcinoma: A meta-analysis

Table 1 Characteristics and quality assessment of 10 included case-control studies

Study	Yr	Country	Ethnicity	Polymorphisms of COX-2	No. of participants	Quality scores
Pereira et al[25]	2006	Portugal	Caucasians	-765G>C	73a/210c	33
Liu et al[27]	2006	China	Asians	-765G>C, -1195G>A, Gly587Arg(G>A)	248a/427c	33
Zhang et al[28]	2006	China	Asians	-765G>C, -1195G>A, -1290A>G	323a/646c	28
Jiang et al[29]	2007	China	Asians	-1195G>A, 8473T>C	254a/304c	36
Hou et al[26]	2007	Poland	Caucasians	-765G>C, IVS5-275T>G, IVS7+111T>C, V102V(G>C), *429T>C, *2430C>T	464a/480c	33
Canzian et al[32]	2008	Venezuela	Hispanics	IVS5-275T>G, V102V, *429T>C	1169a/1863b	39
Zhu et al[30]	2008	China	Asians	-765G>C, 587codonG>A	140a/125c	37
Saxena et al[33]	2008	India	Indians	-765G>C	62a/241d	34
Sitarz et al[18]	2008	Netherlands	Dutch	-765G>C	241a/100c	31
Tang et al[31]	2009	China	Asians	-765G>C	100a/105c	29

^aGastric cancer;

^bPrecancerous gastric lesions;

^cHealthy controls;

^dBenign gastric diseases. COX-2: Cyclooxygenases-2.