MIF and post-traumatic stress disorder: MIF was significantly higher in both PTSD positive cases [2476.8 (1890.3–2913.5) pg/ml; p = 0.016] and PTSD negative cases [2537.36 (2094.69–3222.42) pg/ml; p = 0.050] than in the controls 1856.3 (1540.6–2324.3) pg/ml.