Table 3.

Intraclass correlation coefficients (ICCs) among the pain scales

	VAS	NRS	FPS-R
First pain assessment
VAS	–
NRS	0.917 (0.891–0.938)	–
FPS	0.858 (0.814–0.892)	0.839 (0.790–0.878)	–
Second pain assessment
VAS	–
NRS	0.945 (0.927–0.959)	–
FPS	0.851 (0.805–0.887)	0.846 (0.799–0.883)	–

Data are expressed by ICC (95% CI). 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. CI Confident interval, FPS-R Faces pain scale-revised, NRS Numerical rating scale, ICC Intraclass correlation coefficient, PACU Post-anesthesia care unit, VAS Visual analog scale