Table 2.

Univariate and multivariate logistic regression analysis for the incidence of CA-AKI on the baseline chloride level (n = 13,088).

Variables	Univariate		Multivariate
	RR (95% CI)	P-value	RR (95% CI)	P-value
Normochloremia	Reference		Reference
Hypochloremia	1.394 (1.143–1.700)	0.001	1.382 (1.128–1.693)	0.002
Hyperchloremia	2.564 (1.650–3.984)	<0.001	1.566 (0.989–2.481)	0.056

Abbreviations; RR, relative risk; CI, confidence interval; CA-AKI, contrast-associated acute kidney injury.

Adjusted for age, sex, admission status, comorbidity diseases including DM, hypertension, coronary artery disease, and heart failure, serum creatinine level, serum BUN level, serum tCO2.

Hypochloremia; chloride level less than 98 mEq/L at baseline.

Normochloremia; chloride level between 98 to 110 mEq/L at baseline.

Hyperchloremia; chloride level over 110 mEq/L at baseline.