Hyponatremia is an independent predictor of emergency department revisits in acute exacerbation of COPD

INTRODUCTION Hyponatremia is shown to prolong hospitalization and increase mortality. The role of hyponatremia in chronic obstructive pulmonary disease is widely studied with a focus on hospitalized patients. OBJECTIVES To investigate whether hyponatremia increases the probability of re-exacerbations in non-hospitalized patients with acute exacerbations of chronic obstructive pulmonary disease (AECOPD). METHODS Patients with AECOPD who required an emergency department (ED) visit and who were discharged home were included in this single-center, retrospective study. Demographics and laboratory values were compared between patients with hyponatremia (