C-reactive protein as a non-linear predictor of prolonged length of intensive care unit stay after gastrointestinal cancer surgery

Table 1 Demographic and clinical characteristics of patients

Variables	ICU LoS < 72 h (n = 325), %	ICU LoS ≥ 72 h (n = 83), %	P value
Age (yr)	73.38 ± 11.31	74.18 ± 10.80	0.56
Sex			0.363
Male	218 (67.08)	60 (72.29)
Female	107 (32.92)	23 (27.71)
Laparoscopic surgery			0.221
No	250 (76.92)	69 (83.13)
Yes	75 (23.08)	14 (16.87)
Emergency surgery			0.004
No	275 (84.62)	59 (71.08)
Yes	50 (15.38)	24 (28.92)
Cancer site			0.896
Stomach	162 (49.84)	39 (46.99)
Rectum	41 (12.62)	11 (13.25)
Colon	102 (31.38)	26 (31.33)
Duodenum	20 (6.15)	7 (8.43)
ICU readmission			0.775
No	308 (94.77)	78 (93.98)
Yes	17 (5.23)	5 (6.02)
Tracheotomy			< 0.001
No	323 (99.38)	67 (80.72)
Yes	2 (0.62)	16 (19.28)
Mechanical ventilation			< 0.001
No	289(88.92)	42(50.60)
Yes	36(11.08)	41(49.40)
CRRT therapy			0.442
No	318 (97.85)	80 (96.39)
Yes	7 (2.15)	3 (3.61)
APACHE II scores	9.77 ± 4.31	12.34 ± 5.25	< 0.001
CRP values	3.95 ± 1.21	4.67 ± 0.88	< 0.001

ICU: Intensive care unit; CRRT: Continuous renal replacement therapy; APACHE: Acute Physiology and Chronic Health Evaluation; CRP: C-reactive protein.