Absence of Association between Preoperative Estimated Glomerular Filtration Rates and Postoperative Outcomes following Elective Gastrointestinal Surgeries: A Prospective Cohort Study

Table 1

Baseline characteristics of patients.

	eGFR > 60 mL/min/1.73 m^2 ()	eGFR ≤ 60 mL/min/1.73 m^2 ()	value
Age, years	53.6 (16.4)	69.4 (11.8)	<0.001
Sex, female	149 (45)	20 (49)	0.797
ASA grade			<0.001
Grade 1	39 (12)	1 (3)
Grade 2	234 (71)	25 (63)
Grade 3	55 (17)	11 (28)
Grade 4	0 (0)	3 (8)
Comorbidities			<0.001
0	55 (17)	1 (2)
1-2	154 (47)	9 (22)
>2	120 (37)	31 (76)
Diabetes mellitus	53 (16)	13 (32)	0.025
Ischaemic heart disease	15 (5)	7 (17)	0.004
Congestive cardiac failure	5 (2)	0 (0)	0.938
Surgery grade			0.993
Minor	104 (32)	13 (32)
Intermediate	142 (43)	18 (44)
Major	83 (25)	10 (24)
Surgical specialty			0.008
Upper GI	76 (23)	9 (22)
Lower GI	120 (37)	6 (15)
HPB	133 (40)	26 (63)
Indication for surgery, malignant	82 (25)	10 (24)	1.000
Surgical approach			0.623
Endoscopic/ultrasound	102 (31)	15 (37)
Laparoscopic	103 (31)	10 (24)
Open	124 (37)	16 (39)
Smoking status			0.686
Current	174 (53)	20 (49)
Ex-smoker	77 (24)	8 (20)
Never	73 (22)	13 (32)
Unknown	3 (1)	0 (0)
High-risk PAS clinics	91 (28)	14 (34)	0.493

Upper GI, upper gastrointestinal surgery; lower GI, lower gastrointestinal surgery; HPB, hepatopancreatobiliary surgery.