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Table 2 Subgroup analyses stratified by various factors

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

Factors Subgroups Studies (n) Patients(n) (Case/Control) I2(%) Heterogeneity (p) SMD 95% CI Z test (p)
Ethnicity Caucasians 7 398/315 77.7 < 0.001 0.42 0.06–0.71 0.021
Asians 6 356/186 0.0 0.661 0.19 0.01–0.18 0.037
Joint involvement Knee 8 499/299 65.7 0.005 0.44 0.17–0.72 0.002
Hand 4 185/132 20.1 0.289 0.18 -0.07-0.44 0.161
Knee and Hip 1 70/70 0.00 -0.33-0.34 0.980
Stage early OA 2 77/66 0.0 0.533 0.00 -0.57-0.58 0.356
Middle & late OA 11 677/435 71.8 < 0.001 0.23 -0.17-0.63 0.004