Table 2.

Characteristics of patients with and without complications.

Characteristics		No complications (n = 7613)	Complications (n = 3451)	P valuea
Age:	Median (Q1–Q3)	46.33 (29.58–62.67)	45.17 (28.83–60)	0.0009**
Gender: F/M	n (%)	2306/5307 (30/70)	890/2561 (26/74)	<0.0001***
Mortality: No/Yes	n (%)	6257/1356 (82/18)	2819/632 (82/18)	0.52

^aMann-Whitney U test for age and Fisher's exact test for gender and mortality.

Significant differences are indicated with *(P < 0.05),**(P < 0.001) or ***(P < 0.0001).