Table 2.

Comparison of clinical outcome between two groups

	mTCBD	T-tube	t or χ2 (z)	P
Operative time (min)	178	173	-0.469	0.6402
Output of bile (mL/24 h)	306	409	2.118	0.0372
Postoperative stay(d)	5.4-61	4.4-61	(-2.060)	0.0394
Drain removal (d)	5.4-51	29.22-321	(-7.560)	0.0004
Complications (%)	0	11.5	5.736	0.0173
Retained stones (%)	3.3	13.5	2.574	0.1093
Convert to open (%)	6.5	3.8	0.315	0.5753

¹Median, 25%-75% quartile rang;

²t-test;

³χ² test with Likelihood Ratio;

⁴Mann-Whitney test.