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Table 4 Statistics of polled ORs and Heterogeneity for Overall and Sub Group Analyses of COL9A3 trp3 Polymorphism

From: Association of COL9A3 trp3 polymorphism with intervertebral disk degeneration: a meta-analysis

COL9A3 trp3 N ORs analyses Heterogeneity Analyses Model Used for Meta-analysis
polled ORs (95% CI) P value χ2 Pheterogeneity I2 (%)
Overall 11 1.31 (0.78,2.21) 0.309 25.31 0.003 64.40% Random
sub group analysis by gender male 7 1.30 (0.77,2.17) 0.322 11.30 0.080 46.90% Fixed
female 5 1.11 (0.62,2.01) 0.725 1.64 0.802 0.00%
sub group analysis by ethnicity Asian 3 1.22 (0.52,2.89) 0.645 1.53 0.216 34.70% Random
Caucasian 3 1.53 (0.55, 4.29) 0.417 10.17 0.006 80.3%
unclear 5 0.96 (0.53, 1.75) 0.907 4.96 0.292 19.3%
  1. Abbreviations: CI confidence interval, ORs odds ratios, N number of studies included in each analysis