Table 3.

Mean differences (95% CI) in hospital costs between one-stage and two-stage groups

Costs	One-stage N = 97		Two-stage N = 120	P-value (Multiple comparison)*
	Transcystic (TC) N = 46 Mean (95% CI)	Transductal (TD) N = 33 Mean (95% CI)	ERCP + LC N = 120 Mean (95% CI)
Operation room, €	2806 (2680 to 2931)	3191 (3006 to 3377)	3025 (2898 to 3151)	TC/ TD 0.013 TC/ Two 0.071 TD/ Two 0.438
Postoperative, €	2572 (2200 to 2944)	5835 (3580 to 8089)	3825 (3309 to 4342)	TC/ TD <0.001 TC/ Two 0.049 TD/ Two 0.08
Readmission, €	77 (38 to 192)	339 (6 to 672)	63 (4 to 121)	TC/ TD 0.048 TC/ Two 0.018 TD/ Two 0.997
Total costs, €	5455 (4971 to 5938)	9364 (7048 to 11,681)	6913 (6340 to 7486)	TC/ TD <0.001 TC/ Two 0.029 TD/ Two 0.02

CI Confidence interval, TC Transcystic, TD Transductal

*Bias- corrected and accelerated bootstrap estimation was used to derive 95% confidence intervals