Fig. 3

Clinical outcomes in different groups of AHF patients (a) In-hospital mortality of AHF patients in each BMI subgroup under different PNI groups (b) 90-day mortality of AHF patients in each BMI subgroup under different PNI groups (c) Hospital LOS of AHF patients in each BMI subgroup under different PNI groups (d) ICU LOS of AHF patients in each BMI subgroup under different PNI groups. AHF, acute heart failure; BMI, body mass index; ICU: Intensive Care Unit; LOS: length of stay; PNI, prognostic nutritional index; Compared with BMI < 25 kg/m2, * P < 0.05; **P < 0.01; ***P < 0.001