Table 3. Patient demographic and clinical data.

	All patients	Male	Female
Number of subjects	355	125	230
Age (years)	25.9±7.6 (15–52)	24.5±6.9	26.6±7.9
Body weight (kg)	57.6±10.9 (38–128)	65.9±11.2	53.1±7.5
PPLpre (s)	14 [9], [23] (2–150)	15 [10], [26]	14 [9], [22]
PPLpost (s)	28 [16, 53] (4–150)	35 [19, 70]	26 [15, 48]*
Analgesic effect (PPLpost-PPLpre) (s)	12 [4, 35] (−21 – +143)	15 [5, 40]	10 [4], [29] ( * )
Intraoperative fentanyl use (µg/kg)	4.4 [3.2, 5.9] (0–13.6)	4.0 [2.9, 5.3]	4.6 [3.4, 6.1]*
24 h postoperative fentanyl use (µg/kg)	2.3 [1.0, 4.2] (0–13.8)	1.8 [0.6, 4.0]	2.4 [1.4, 4.3]( * )
Perioperative fentanyl use (µg/kg)	6.9 [5.2, 9.1] (0.8–24.2)	6.4 [4.7, 8.5]	7.2 [5.8, 9.3]*
VAS pain score at 3 h (mm)	27 [15, 50] (0–90)	26 [15, 50]	28 [15, 50]
VAS pain score at 24 h (mm)	25 [10, 42] (0–85)	25 [10, 40]	25 [10, 42]

The data are expressed as numbers, mean ± SD (range), or median [interquartile range].

⁽*⁾ p<0.1,

^* p<0.05, compared with male subjects.