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Table 1 Characteristics of studies included in this meta-analysis

From: Lack of association of matrix metalloproteinase-3 gene polymorphism with susceptibility to rheumatoid arthritis: a meta-analysis

Author year Ethnicity HWE ( P) Score Sample size (case/control) Case (%) Control (%)
5A 6A 6A/6A 5A/6A 5A/5A 5A 6A 6A/6A 5A/6A 5A/5A
Abd-Allah 2012 Caucasian (Egypt) Y (0.986) 8 100/100 88 (44.0) 112 (56.0) 33 (33.0) 46 (46.0) 21 (21.0) 128 (64.0) 72 (36.0) 13 (13.0) 46 (46.0) 41 (41.0)
Constantin 2002 Caucasian (France) Y (0.213) 8 102/126 98 (48.0) 106 (52.0) 27 (26.5) 52 (51.0) 23 (22.5) 111 (44.0) 141 (56.0) 36 (28.5) 69 (54.8) 21 (16.7)
Dörr 2004 Caucasian (Germany) Y* 8 308/110 306 (49.6) 310 (50.4) NM NM NM 103 (46.8) 117 (53.2) NM NM NM
Rodrigue 2006 Caucasian (Spain) Y* 7 550/652 556 (50.5) 544 (49.5) NM NM NM 674 (51.7) 630 (48.3) NM NM NM
Scherer 2010 Caucasian (Brazil) Y (0.130) 8 110/100 71 (32.3) 149 (67.7) 52 (47.3) 45 (40.9) 13 (11.8) 90 (45.0) 110 (55.0) 34 (34.0) 42 (42.0) 24 (24.0)
Zhou 2007 Asian (China) Y (0.150) 7 281/151 65 (11.6) 497 (88.4) 224 (79.7) 49 (17.4) 8 (2.8) 36 (11.9) 266 (88.1) 119 (78.8) 28 (18.5) 4 (2.7)
  1. HWE: Hardy–Weinberg equilibrium, Y: yes, N: no. *confirmed in original study, Score: The Newcastle-Ottawa Scale for Case-control Study, NM: none mention.