From: Lower serum sodium levels predict poor clinical outcomes in patients with insomnia
 | All-cause mortality | |
---|---|---|
HR (95% CI) | P | |
Tertiles of serum sodium (ref. serum sodium 138.0–140.9 mg/dL) |  | < 0.001 |
 Serum sodium < 138.0 mg/dL | 2.99 (1.40–6.39) |  |
 Serum sodium ≥141.0 mg/dL | 0.36 (0.42–1.03) |  |
Acute kidney injury (ref. No) | 3.70 (1.99–6.90) | <  0.001 |