The dropout group had a higher proportion of younger individuals, males, those not requiring care, and those with higher BMI, higher Alb, higher Hb, lower BNP, lower CRP, higher eGFR, higher GNRI, higher pre-hospitalization Katz index, lower rate of lower limb peripheral arterial disease, higher employment rate, shorter length of hospital stay, higher in-hospital death rate, higher grip strength, higher SPPB score, and better cognitive function at admission. The gene discussed is GSTM1; the disease is peripheral arterial disease.