Figure 3:
Forest plots of studies reporting associations between polymorphisms and chronic post-surgical pain that were included in the meta-analysis are presented. Individual effect sizes of the studies included for the particular variant allele and fixed effect (FE) model odds ratios are presented with 95% confidence intervals (CI). For COMT rs4680 variant, 3 models were investigated (presented in table 3). Forest plot of dominant model (with least heterogeneity among them) is presented in this figure.