Table 3.

Postoperative cumulative doses of fentanyl consumption.

Time after surgery	ICNB group (N = 23)	SAPB group (N = 23)	P value	Mean difference (95% CI)
At 2 h	117.39 ± 48.10	143.30 ± 60.06	.11	−25.91 (−58.25 to 6.42)
At 4 h	168.52 ± 65.04	197.04 ± 72.40	.17	−28.52 (−69.42 to 12.37)
At 6 h	213.09 ± 81.59	241.22 ± 87.25	.26	−28.13 (−78.33 to 22.07)
At 12 h	322.39 ± 114.91	347.22 ± 100.60	.44	−24.83 (−89.01 to 39.35)
At 24 h	548.91 ± 154.29	564.39 ± 149.60	.73	−15.48 (−105.79 to 74.83)
At 36 h	710.13 ± 217.89	693.04 ± 201.15	.78	17.09 (−107.53 to 141.70)
At 48 h	830.87 ± 314.56	793.74 ± 275.71	.67	37.13 (−138.65 to 212.91)

Data are presented as mean ± standard deviation (μg).

CI = confidence interval, ICNB = intercostal nerve block, SAPB = serratus anterior plane block.