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Table 1 Characteristics of the included studies

From: Association of osteoarthritis and circulating adiponectin levels: a systematic review and meta-analysis

Reference Year Ethnicity Country Position Sample Size Female ratio(%) Mean age (years) Mean BMI(kg/m2) Method NOS
Case Control Case Control Case Control Case Control
Senolt [29] 2006 Caucasians Czech Republic Knee 21 23 73.9 73.9 66.15 58.13 27.1 25.5 ELISA 7
Filkova(a) [30] 2009 Caucasians Czech Republic Hand 27 20 100.0 100.0 NA NA NA NA ELISA 6
Filkova(b) [30] 2009 Caucasians Czech Republic Hand 48 20 100.0 100.0 NA NA NA NA ELISA 6
Tan [21] 2009 Asians China Knee 35 20 85.7 85.0 50.1 45.9 19.3 20.1 ELISA 7
Honsawek [22] 2010 Asians Thailand Knee 76 24 81.6 79.2 69.8 71.2 26.1 25.5 ELISA 7
De Boer [31] 2012 Caucasians Netherlands Knee 172 132 69.2 74.2 67.4 56.5 29.5 28.1 ELISA 8
Choe(a) [23] 2012 Asians Korea Hand 50 46 NA NA 61.6 57.6 24.1 23.9 ELISA 8
Choe(b) [23] 2012 Asians Korea Hand 60 46 NA NA 63.5 57.6 24.1 23.9 ELISA 8
Wang [32] 2014 Asians China Knee 64 19 73.4 73.6 62.4 39.1 26.1 25.5 ELISA 8
Liu [33] 2015 Asians China Knee 71 31 31.0 35.5 46.7 44.9 26.1 25.9 ELISA 8
Cuzdan Coskun(a] [14] 2015 Caucasians Turkey Knee 30 25 90.0 52.0 67.0 43.1 23.4 27.5 ELISA 6
Cuzdan Coskun(b) [14] 2015 Caucasians Turkey Knee 30 25 100..0 52.0 64.5 43.1 33.6 27.5 ELISA 6
Tootsi [34] 2016 Caucasians Estonia Knee and Hip 70 70 50.0 48.6 62.0 60.0 28.0 26.0 ELISA 7
  1. M Male, F Female, ELISA Enzyme-linked immunosorbent assay, NA Not available