Figure 4. Forest plot of inflammatory factor effect sizes for suction blister fluid samples from chronic complex regional pain syndrome (CRPS) cases (CRPS-affected compared with the unaffected arm).

Each study effect size (standardized mean difference) and weight is indicated by an open box and its 95% confidence intervals (CIs) are indicated by a horizontal line. The filled diamonds represent the overall effect size and CIs for each factor. Statistically significant outcomes are indicated by an asterisk. IL = interleukin; IP-10 = interferon-inducible protein-10; MCP-1 = monocyte chemoattractant protein-1; MIP-1β = macrophage inflammatory protein 1 beta; TNF = tumor necrosis factor.