Table 2. Variables retained in the propensity score model for nephrology consultation (P<0.05)^*.

	P	OR (95% CI)
SAPS 3 CSA1	0.002	1.17 (1.06–1.30)
SCr (mg/dL)	<0.0001	2.34 (1.78–3.08)
Diuresis (1000 ml/24 h)	<0.001	0.74 (0.58–0.93)
Serum potassium (mEq/L)	0.037	1.36 (1.01–1.84)
Serum bicarbonate (mEq/L)2	0.037	0.53 (0.29–0.96)

^*Model performance: area under ROC curve = 0.86 (0.82–0.90); Hosmer-Lemeshow χ² = 0.29.

¹Each 10 units.

²Each 10 mEq/L.

ROC, receiver operating characteristic; SAPS, simplified acute physiology score; CSA, customized equation for countries from Central and South America; SCr, serum creatinine level; OR, odds ratio; CI, confidence interval.