Table 1.

Patients’ demographics and results of the univariant χ² analysis

	n	Recurrence n (%)	χ2 (95% CI)
Gender
Male	208	19 (9.1)
Female	5	0
Smoking	68	6 (8.8)
BMI: mean (range)	24.9 (20.3–30.3)	25.1 (22.0–28.7)
Age at operation >50 years	107	13 (12.1)	0.231
Abdominal aortic aneurysm	3	0
COPD	17	3 (17.6)	0.188
Prostatism	32	3 (9.4)
Obstipation	16	1 (6.2)

CI confidence interval, BMI body mass index, COPD chronic obstructive pulmonary disease