Table 2.

Intraoperative parameters of patients treated by T-tube drainage (TD group) and primary closure (PC group) following laparoscopic common bile duct exploration

Parameters	TD group	PC group	P
	(n = 153)	(n = 145)
Operation time (min)	124.6 ± 40.8	106 ± 36.4	0.000
Blood loss (ml)	56.2 ± 54.5	53.8 ± 50.6	0.692
Ratio of conversion to laparotomy (%)	2.6	2.1	1.000
Severe gallbladder inflammation and poor presentation of the gallbladder triangle	4	3

Data are presented as mean ± standard deviation or n unless otherwise indicated