TNF and post-traumatic stress disorder: Spearman's rho correlations were calculated among biomarkers, PTSD symptoms, and change scores.<h4>Results</h4>Small increases were observed in IL-6 (<i>g</i> = 0.24; 95% CI -0.25, 0.72) and CRP (<i>g</i> = 0.23; 95% CI -0.30, 0.74), and a small decrease in TNF-α (<i>g</i> = -0.24; 95% CI -0.69, 0.23).