(A) In-hospital mortality rates are displayed by admission eGFR and left ventricular ejection fraction (LVEF). (B) Risk-adjusted associations between admission eGFR and in-hospital mortality, adjusted for age, sex, race, admission systolic blood pressure, admission heart rate, body mass index, diabetes, atrial fibrillation/flutter, prior myocardial infarction, prior stroke or transient ischemic attack, chronic obstructive pulmonary disease, hospital region, hospital teaching status, and hospital area income (based on zip code tabulation area) are shown. Interaction analyses identified slightly stronger association among patients with HFrEF. Adj = adjusted; CI = confidence interval; HFmrEF = heart failure with mid-range ejection fraction; HFpEF = heart failure with preserved ejection fraction; OR = odds ratio; other abbreviations as in Figure 1.