Table 2.

Perfusion index and bispectral index change ratios over time.

	Group N (n = 50)	Group P (n = 48)	p-Value
PI change ratio
T2	0.98 ± 1.7	1.02 ± 1.8	0.909
T3	0.00 ± 1.0	−0.12 ± 1.3	0.635
T4	−0.36 ± 0.62	−0.40 ± 0.5	0.729
BIS change ratio
T2	−0.60 ± 0.1	−0.55 ± 0.2	0.123
T3	−0.43 ± 0.1	−0.36 ± 0.3	0.181
T4	−0.13 ± 0.1	−0.13 ± 0.1	0.786

PI: perfusion index, BIS: bispectral index, T2: start of surgery, T3: end of surgery, T4: after extubation, PI change ratio (PI at each time point − PI at T1/PI at T1), BIS change ratio (BIS at each time point − BIS at T1/BIS at T1), Group N: patients with pain scores <7 in the PACU, Group P: patients with pain scores ≥7 in the PACU, PACU: postoperative anesthesia care unit, p < 0.05 was considered statistically significant.