Table 3. Binary logistic regression using categorical predictor variables.

Variable	OR (95% CI)	p-value
Age	1.035 (1.017 - 1.053)	<0.001
Shock on admission	2.626 (1.393 - 4.950)	0.003
Postoperative	0.302 (0.148 - 0.617)	0.001
Admission hypoalbuminaemia (using cut-off ≤18.5)	3.739 (1.870 - 7.478)	<0.001
Admission acid-base status		0.051
Admission acidaemia	2.127 (1.076 - 4.205)	0.03
Admission alkalaemia	0.894 (0.274 - 2.918)	0.853

OR = odds ratio

CI = confidence interval