Preoperative hidden renal dysfunction add an age dependent risk of progressive chronic kidney disease after cardiac surgery

Table 3 Multivariate logistic regression analysis for the risk factors of postoperative AKI

	Age < 65 years			Age ≥ 65 years
	OR	95% CI	P value	OR	95% CI	P-value
Age	1.030	1.012–1.078	< 0.01	1.108	1.017–1.230	< 0.01
Gender (male)	2.451	1.890–3.378	< 0.01	2.125	1.435–4.160	< 0.01
BMI				1.078	1.011–1.146	0.023
Hypertension	1.389	1.028–1.785	0.022
Aorta surgery	1.809	1.088–2.847	0.013
CPB time	1.010	1.006–1.013	< 0.01
eGFR ≥90 mL/min/1.73 m²	Reference	–	–
60 ≤ eGFR < 90 mL/min/1.73 m²	1.729	0.764–3.021	0.257
eGFR < 60 mL/min/1.73 m²	1.326	1.078–2.897	< 0.01
Intraoperative hypotension	3.338	1.204–6.016	< 0.01	2.013	1.034–3.145	< 0.01
LCOS	2.834	1.124–4.576	< 0.01	2.126	1.018–3.896	< 0.01

Abbreviations: BMI body mass index, CPB cardiopulmonary bypass, eGFR estimated glomerular filtration rate, LCOS low cardiac output syndrome