Severe postoperative infections following surgery for digestive system diseases

Table 6 Comparison of clinical outcomes between infection and non-infection groups, n (%)/mean ± SD

Variable	Infection group (n = 38)	Non-infection group (n = 118)	t/χ2	P value
Total hospital stay (days)	24.3 ± 9.8	11.6 ± 5.2	10.46	< 0.001
Postoperative stay (days)	19.8 ± 8.6	8.4 ± 4.3	10.72	< 0.001
ICU admission	14 (36.8)	8 (6.8)	21.02	< 0.001
ICU stay (days, median, IQR)	4.5 (2-8)	2 (1-3)	2.861	0.004
Mechanical ventilation	6 (15.8)	3 (2.5)	8.94	0.003
Re-intervention	10 (26.3)	2 (1.7)	22.84	< 0.001
Percutaneous drainage	6 (15.8)	1 (0.8)
Reoperation	4 (10.5)	1 (0.8)
30-day mortality	4 (10.5)	1 (0.8)	8.14	0.004
30-day readmission	8 (21.1)	6 (5.1)	9.04	0.003

¹Mann-Whitney U test.

ICU: Intensive care unit; IQR: Interquartile range.