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Table 1 Studies and data included in this meta-analysis

From: Association between Catechol-O-methyltransferase rs4680 (G > A) polymorphism and lung cancer risk

Investigator Year Race Country Case Control HWEa Control source Methods NOSbscore
     AA AG GG AA AG GG pa    
Zhang et al. [7] 2013 Asian China 11 69 120 19 78 103 0.454 HBc Sequence 8
Lim et al. [11] 2012 Asian Singapore 39 220 284 63 353 549 0.539 HB PCRe 7
Cote et al. [18] 2009 Caucasian USA 102 205 78 114 197 92 0.696 PBd PCR 8
Cote et al. [18] 2009 Black USA 10 46 56 14 47 59 0.332 PB TaqMan 8
Zienolddiny et al. [20] 2008 Caucasian Norway 32 62 163 8 60 202 0.182 PB Sequence 8
Gemignani et al. [19] 2007 Caucasian European 59 144 83 75 146 81 0.569 HB PCR 7
  1. p a for Hardy-Weinberg equilibrium in control group; bfor Newcastle-Ottawa Scale. cfor hospital-based; dfor population-based; efor polymerase chain reaction.