Table 1 Demographic and clinical characteristics of hospitalized individuals with and without hyponatremia
Serum sodium concentration (mmol/L) | |||||
|---|---|---|---|---|---|
≥135 (n = 127,388) | 130–134 (n = 20,076) | 125–129 (n = 5035) | 120–124 (n = 1355) | <120 (n = 524) | |
Age (years) | 48.8 ± 15.9 | 55.6 ± 17.2 | 58.8 ± 17.3 | 60.1 ± 16.7 | 59.9 ± 17.2 |
Male (%) | 36.1 | 50.0 | 51.9 | 52.7 | 51.7 |
Primary discharge diagnosis (%) | |||||
Infectious disease | 67.0 | 21.7 | 8.5 | 2.1 | 0.7 |
Cancer | 74.1 | 18.4 | 5.4 | 1.6 | 0.5 |
Cardiovascular disease | 75.1 | 19.0 | 4.7 | 0.9 | 0.3 |
Gastrointestinal disease | 77.5 | 16.9 | 4.3 | 0.9 | 0.4 |
Observation for suspected disease | 78.6 | 14.0 | 5.5 | 1.3 | 0.6 |
Muscle and connective tissue disease | 78.7 | 16.9 | 3.3 | 0.9 | 0.3 |
Respiratory disease | 78.8 | 13.5 | 5.4 | 1.6 | 0.8 |
Others | 84.9 | 11.7 | 2.5 | 0.7 | 0.3 |
Neurologic disease | 85.8 | 10.2 | 2.8 | 0.9 | 0.4 |
Endocrine disease | 90.3 | 6.8 | 1.7 | 0.7 | 0.5 |
Urogenital disease | 93.6 | 5.2 | 0.8 | 0.3 | 0.1 |