Preoperative performance status was associated with postoperative fatal complications in elderly patients with refractory ulcerative colitis

Table 1 Postoperative complications

Parameters	All patients, n = 191	CDC grade 1	CDC grade 2	CDC grade 3	CDC grade 4	CDC grade 5
All complications1	118 (61.7)	7 (3.6)	71 (37.1)	22 (11.5)	4 (2.0)	14 (7.3)
Infectious complications
Incisional SSI	27 (14.1)	8 (4.1)	13 (6.8)	6 (3.1)	0	0
Organ/space SSI	19 (9.9)	0	7 (3.6)	10 (5.2)	1 (0.5)	1 (0.5)
Bloodstream infections	7 (3.6)	0	6 (3.1)	0	0	1 (0.5)
Pneumonia	19 (9.9)	0	7 (3.6)	0	4 (2.0)	8 (4.1)
Other infections2	7 (3.6)	0	6 (3.1)	0	1 (0.5)	0
Other complications
Obstruction/ileus	21 (10.9)	0	14 (7.3)	7 (3.6)	0	0
Postoperative bleeding	24 (12.5)	1 (0.5)	11 (5.7)	6 (3.1)	2 (1.0)	4 (2.0)
Thrombosis	16 (8.3)	0	16 (8.3)	0	0	0
Urinary retention	0	0	0	0	0	0
High-output stoma	7 (3.6)	0	7 (3.6)	0	0	0

¹The highest grade of complications for each patient.

²Other infections included urinary tract infection and fever (> 38 °C) of other or unknown origins.

Data are presented as n (%) in parentheses unless otherwise indicated. CDC: Clavien-Dindo classification; SSI: Surgical site infection.