Development of a novel difficulty scoring system for laparoscopic liver resection procedure in patients with intrahepatic duct stones

Table 5 Postoperative outcomes of laparoscopic liver resection in three levels of difficulty, n (%) (mean ± SD)

Variables	Low (n = 24)	Medium (n = 7)	High (n = 3)	P value
Surgical times, min	292	355	401	0.034
Blood loss, mL	187	307	500	0.002
Postoperative hospital stays, day	8	9	9	0.269
Intraoperative blood transfusion	1 (4.2)	1 (14.3)	2 (66.7)	0.007
Hospital costs, CNY	47540	53956	52507	0.336
Clavien-Dindo classification ≥ 3	1 (4.2)	1 (14.3)	2 (66.7)	0.007
Postoperative alanine aminotransferase, U/L	169	352	320	0.002

CNY: China yuan.