Fig. 2

The receiver operating characteristic curves for CT attenuation and fatty infiltration rate. The fatty infiltration rate has a higher diagnostic value than CT attenuation. The area under the curve of the fatty infiltration rate for diagnosing incisional hernia is 0.689 (95% CI 0.60–0.77), with a cut-off at 3.8%, sensitivity of 58.33%, and specificity of 73.3%. The area under the curve of the CT attenuation for diagnosing incisional hernia is 0.604 (95% CI 0.51–0.69), with a cut-off at 43.5 HU, sensitivity of 66.67% and specificity of 51.67%