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Table 2 Hospital outcomes of pneumonia patients by hyponatremia status

From: Hyponatremia and hospital outcomes among patients with pneumonia: a retrospective cohort study

  Hyponatremia present
(n = 649)
Hyponatremia absent
(n = 7,316)
p value*
Hospital mortality (%) 5.4 4.0 0.099
Proportion on MV (%) 3.9 2.3 0.014
Proportion in ICU (%) 10.0 6.3 <0.001
Mean (SD) ICU LOS (days) 6.3 (5.6) 5.3 (5.1) 0.069
Mean (SD) HLOS (days) 7.6 (5.3) 7.0 (5.2) <0.001
Median (95%CI) hospital costs $7,086 ($3,765–$14,221) $5,732 ($2,966–$12,290) 0.001
  1. MV = mechanical ventilation; ICU = intensive care unit; SD = standard deviation; HLOS = hospital length of stay; CI = confidence interval
  2. *P-values obtained using Wilcoxon rank-sum test or Median score test for continuous variables, and chi-square test for categorical variables