Table 3.

Hazard ratios for 90-day mortality according to the corrected sodium level

	Corrected sodium	N	Mortality (%)	Model 1	Model 2	Model 3
Total		755	130 (17.2)
Hyponatremia	<135	34	13 (38.2)	4.87 (2.18–10.87)	4.45 (1.99–9.95)	3.56 (1.44–8.80)
Low normonatremia	135–139.9	120	11 (9.2)	1 [Reference]	1 [Reference]	1 [Reference]
High normonatremia	140–144.9	251	31 (12.4)	1.37 (0.69–2.72)	1.32 (0.66–2.64)	1.31 (0.63–2.69)
Mild hypernatremia	145–149.9	157	23 (14.6)	1.68 (0.82–3.44)	1.63 (0.79–3.35)	2.40 (1.11–5.15)
Severe hypernatremia	≥ 150	193	52 (26.9)	3.38 (1.76–6.47)	3.02 (1.56–5.84)	2.68 (1.28–5.62)

Model 1: unadjusted; Model 2: adjusted for age/sex; Model 3: Adjusted for age, sex, glucose, respiratory rate, systolic blood pressure, pulse rate, white blood cell, hemoglobin, C-reactive protein, blood urea nitrogen, creatinine.