Table 2.

All surgical complications, multivariate analysis.

	Number of operations	Number of cases with any complication (%)	OR (95 % CI)	p-value
Total	163,500	4576 (2.8 %)	–	–
FFLC <20 %	150,113	4190 (2.8 %)	Ref	–
FFLC 20–79 %	10,211	291 (2.8 %)	1.07 (0.92–1.25)	0.39
FFLC ≥80 %	3176	95 (3.0 %)	1.06 (0.74–1.51)	0.75
Female	108,447	2714 (2.5 %)	Ref	–
Male	55,053	1862 (3.4 %)	1.16 (1.09–1.24)	<0.001
Age <40 years	45,422	844 (1.9 %)	Ref
Age 40–49 years	32,577	683 (2.1 %)	1.10 (0.99–1.22)	0.089
Age 50–64 years	48,289	1389 (2.9 %)	1.48 (1.36–1.62)	<0.001
Age ≥65 years	37,212	1660 (4.5 %)	2.23 (2.04–2.43)	<0.001
No cholecystitis	131,616	3242 (2.5 %)	Ref	–
Cholecystitis	31,884	1334 (4.2 %)	1.51 (1.40–1.64)	<0.001