Table 1.

Surgical parameters in patients undergoing surgery for choledochal malformation in the Netherlands between January 1, 1989 and December 31, 2014

	All (n = 91)	Laparoscopy (n = 12)	Laparotomy (n = 79)	Surgery <1 year of age (n = 30)	Surgery >1 year of age (n = 61)
Median age at surgery (years)	2.1 (0.03–17.7)	1.1 (0.03–8.9)	2.3 (0.06–17.7) (0.2)	0.2 (0.03–1.0)	4.3 (1.1–17.7)
Median weight at surgery (kg)	10.6 (2.8–52.5) (n = 66)	9.0 (2.8–28) (n = 11)	11.0 (3.7–52.5) (n = 55) (p = 0.3)	5.2 (2.8–12) (n = 24)	15.8 (9–52.5) (n = 42)
Median operative time (hrs)	3.5 (1.2–9.3) (n = 81)	5.5 (2.0–7.2) (n = 11)	3.5 (1.2–9.3) (n = 70) (p = 0.03)	3.5 (1.5–6.3) (n = 27)	3.5 (1.7–9.3) (n = 54) (p = 0.2)
Median hospital stay (days)	9 (2–61) (n = 88)	5 (4–16)	9 (2–61) (n = 76) (p = 0.02)	12 (4–61) (n = 29)	8 (2–29) (n = 59) (p < 0.01)

kg kilograms, hrs hours