Further selection using the Lasso method resulted in 24 factors: age (75‐84 y and ≥85 y), male sex, BMI <18.5 kg/m2, nonhome admission, emergency admission, low income, Barthel Index at admission ≤60, open surgery, gastrointestinal cancer, cancer stage III–IV, HFRS ≥5, cerebrovascular disease, congestive heart failure, dementia, diabetes, liver disease, myocardial infarction, medical history of chemotherapy, systolic blood pressure ≥180 mm Hg, albumin<3.5 g/dL, creatinine ≥ 2.0 mg/dL, platelet <105/μL, and hemoglobin <11 g/dL. Here, ALB is linked to myocardial infarction.