Short and long-term outcome post acute PE.

<p>CI indicates confidence interval.</p><p>Group 1: Normonatremia (initial serum sodium ≥135 mmol/L and stayed normal during admission); Group 2: Corrected hyponatremia (initial serum sodium <135 mmol/L with subsequent normalization during admission, i.e. ≥135 mmol/L); Group 3: Acquired hyponatremia (initial serum sodium ≥135 mmol/L, with subsequent fall during admission to <135 mmol/L); Group 4: Persistent hyponatremia (initial serum sodium <135 mmol/L and stayed <135 mmol/L during admission).</p>*<p>Comparison between groups only performed for in-hospital death using binary logistic regression. For post-discharge comparison, see Kaplan-Meier analyses.</p>†<p><i>p</i><0.01 compared to Group 1.