Table 2.

Intraoperative fentanyl consumption and ANI score

Variable	ANI-guided group (n = 30)	Control group (n = 30)	Mean difference (95% CI)	P-value
Total intraoperative fentanyl consumption
Total dose (μg)	158.3 ± 38.5	162.5 ± 40.9	−4.2 (−24.7 to 16.4)	0.686†
Average dose (μg·kg−1·h−1)	1.01 ± 0.33	1.16 ± 0.34	−0.14 (− 0.31 to 0.03)	0.105†
Mean ANI score	65.2 ± 17.7	63.0 ± 18.2	2.2 (0.3 to 4.0)	0.022†

Data are expressed as mean ± SD; ^†Unpaired Student’s t-test

ANI Analgesia Nociception Index