Overcrowding in the emergency department (ED) can result in long wait times to be seen or admitted, as well as placing patients at increased risk of adverse events. In this prospective study, researchers compared the risk of in-hospital mortality among older patients who spent a night in the ED waiting for admission to the hospital versus older patients who were admitted to the hospital before midnight. Findings indicate that patients who spent an overnight in the ED had a higher in-hospital mortality rate, increased risk of adverse events, and longer length of stay; this risk was exacerbated for patients with limited functional status.