Table 2

Hospital outcomes of pneumonia patients by hyponatremia status

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


MV = mechanical ventilation; ICU = intensive care unit; SD = standard deviation; HLOS = hospital length of stay; CI = confidence interval

*P-values obtained using Wilcoxon rank-sum test or Median score test for continuous variables, and chi-square test for categorical variables

Zilberberg et al. BMC Pulmonary Medicine 2008 8:16   doi:10.1186/1471-2466-8-16

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