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Table 2 Meta-analysis of case-control studies on the role of the COMT (catechol-O-methyltrasferase) val158/108Met polymorphism in suicidal behavior

From: No association between COMT val158met polymorphism and suicidal behavior: meta-analysis and new data

References Number of COMTval alleles Number of COMTmet alleles Odds Ratio (95% IC)
  Cases Control Cases Control  
Tovilla-Zárate 126 272 84 200 0.90 (0.65-1.26)
Lee [5] 223 273 117 121 1.18 (0.86-1.61)
Perroud [29] 848 255 784 221 1.06 (0.86-1.30)
Zalsman [35] 182 121 220 117 1.25 (0.90-1.72)
Rujescu [38] 139 323 159 333 1.10 (0.84-1.95)
Liou [39] 95 275 29 101 0.83 (0.51-1.33)
Russ [34] 52 58 46 40 1.28 (0.72-2.25)
Ohara [40] 11 175 13 95 2.17 (0.93-5.04)
Random effects 1676 1752 1452 1228 1.09 (0.97-1.23)