eGFR is a reliable preoperative renal function parameter in patients with gastric cancer

Table 1 Patients’ backgrounds

Age (yr)	68.3 ± 9.8
Sex (M/F)	107/40
Pre-sCr (mg/dL)	0.74 ± 0.20
Pre-Ccr (mL/min)	71.5 ± 24.5
Pre-eGFR (mL/min)	71.1 ± 20.5
Post-max-sCr (mg/dL)	0.82 ± 0.30
Method of operation
Distal gastrectomy	79
Total gastrectomy	59
Others	9

Pre-sCr: Preoperative serum creatinine; Pre-Ccr; Preoperative creatinine clearance; Pre-eGFR: Preoperative estimated glomerular filtration rate; Post-max-sCr: Maximum value of postoperative sCr.

Table 2 Preoperative Ccr and eGFR

	Normal	Abnormal	P-value
Pre-Ccr	37	110	0.89
Pre-eGFR	35	112

There were no differences between Ccr and eGFR, with regard to abnormalities in preoperative tests.

Table 3 Distribution of postoperative sCr in patients with preoperative Ccr and eGFR abnormality

	Abnormal pre-Ccr	Abnormal pre-eGFR	P-value
Post-sCr
Normal	8	5	0.29
Abnormal	9	12

Postoperatively, 17 patients had abnormal sCr values. Of these 17 patients, 9 (52.9%) had abnormal preoperative Ccr values and 12 (70.6%) had abnormal preoperative eGFR values.

Table 4 Distribution of postoperative sCr in patients with preoperative Ccr and eGFR normality

	Post-sCr		P-value
	Normal	Abnormal
Normal pre-Ccr	103	7	0.53
Normal pre-eGFR	107	5

Among the 110 patients who had normal preoperative Ccr values, 7 (6.3%) had postoperative sCr abnormality, and among the 112 patients who had normal preoperative eGFR values, 5 (4.5%) had postoperative sCr abnormality.

Table 5 Distribution of postoperative sCr in patients with preoperative Ccr and eGFR abnormality

	Post-sCr		P-value
	Abnormal	Normal
Abnormal pre-Ccr	7	30	0.34
Abnormal pre-eGFR	10	25

Among the 37 patients who had abnormal preoperative Ccr values, 30 (81.1%) had normal postoperative sCr values, and among the 35 patients who had abnormal preoperative eGFR values, 25 (71.4%) had normal postoperative sCr values.