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Table 1 Characteristics of studies included in TNF-α polymorphisms and osteoarthritis

From: Meta-analysis of tumor necrosis factor alpha -308 polymorphism and knee osteoarthritis risk

Study Ethnicity Design Phenotype HWE Total cases Total controls GG GA AA
Cases Controls Cases Controls Cases Controls
Moos 2000 [17] Caucasian HCC Knee/Hip No 55 240 36 166 18 74 1 0
Romero 2002 [18] Caucasian HCC Knee Yes 31 30 28 28 3 2 0 0
Sezgin 2008 [19] Caucasian HCC Knee Yes 151 84 121 72 26 12 4 0
Han 2012 [20] Asian PCC Knee Yes 301 291 79 258 188 33 34 0
Valle 2012 [21] Caucasian PCC Knee Yes 50 100 44 93 6 7 0 0
Ji 2013 [22] Asian PCC Knee Yes 200 305 143 253 50 50 7 2
Cheng 2013 [23] Asian PCC Knee Yes 200 305 143 253 50 49 7 3
  1. HCC Hospital based case–control study, PCC population based case–control study. HWE Hardy-Weinberg equilibrium.