Nondrainage after Laparoscopic Cholecystectomy for Acute Calculous Cholecystitis Does Not Increase the Postoperative Morbidity

Table 5

Perioperative outcomes.

Parameters	Drainage group; (n = 106)	Nondrainage group; (n = 106)	P
Modification of the operative technique (n, %)	24(22.6%)	26 (24.5%)	0.45
Operative time(minutes)	110±15.5	99±10.4	0.04
Blood loss(ml)	75±23.5	70±25.8	0.32
Transfusion (u)	0	0
Dose of analgesic (mg)	105±50	75±25	0.02
Maximum gallstone size (cm)	2.0±1.1	1.9±1.3	0.55
Time to resume normal activity (days)	2.4±1.0	2.0±0.8	0.03
Hospital stay (days)	3.5±1.5	3.0±1.4	0.04

–Whitney U for continuous variables, and the categorical variables were analyzed by the χ2 test or continuity correction method.