Table 4 Categories of pain by the cut-off values

From: Cut-off points between pain intensities of the postoperative pain using receiver operating characteristic (ROC) curves

  VAS NRS FPS-R
First pain assessment
 None ≤ 1.1 ≤ 1 0, 2
 Mild 1.2–5.4 2–5 4
 Moderate 5.5–7.3 6–8 6
 Severe 7.4–10 9–10 8, 10
Second pain assessment
 None ≤ 1.7 ≤ 1 0
 Mild ≤ 5.2 2–5 2, 4
 Moderate 5.3–7.1 6–8 6
 Severe 7.2–10 9–10 8, 10
Combined
 None ≤ 1.6 ≤ 1 0, 2
 Mild 1.7–5.3 2–5 4
 Moderate 5.4–7.1 6–7 6
 Severe 7.2–10 8–10 8, 10
  1. First pain assessment was performed when the patients opened their eyes spontaneously or responded well to physicians’ verbal commands to say their name after arriving at the PACU. The second pain assessment was performed 30 min after arriving at the PACU. FPS-R Faces pain scale-revised, NRS Numerical rating scale, PACU Post-anesthesia care unit, VAS Visual analog scale