Table 2: Demographics, clinical and lab characteristics of hyponatremia groups.

Characteristics No Hyponatremia n = 535 Hyponatremia n = 128 P
n Median (IQR) n Median (IQR)
Age, y 534 4 (2-9) 128 5 (3-8) 0.04
LOS (days) 302 2 (1-3) 91 2 (2-3) 0.24
Glucose (mg/dL) 534 107 (95-123) 127 107 (96-125) 0.59
Bicarbonate (mEq/L) 528 21.2 (19.3-22.9) 127 20.5 (18.9-22.2) 0.02
Anion gap 531 11.6 (9.5-14) 127 10.9 (9.2-13.1) 0.11
WBC (109/L) 444 11 (7.7-15.6) 114 13.5 (7.9-18.2) 0.04
Band (%) 394 12 (6-22) 105 14 (9-23) 0.12
CRP (mg/L) 175 3.5 (1-10.3) 56 7.2 (3-15.4) 0.004
Max body temperature in the emergency department, ℃ 534 38.7 (38.3-39.3) 128 39 (38.6-39.5) < 0.001

LOS: Length of Hospital Stay; CRP: C-Reactive Protein; WBC: White Blood Cell Count. Wilcoxon Rank Sum test used.