GSTM1 and plasma cell myeloma: Moreover, the levels of biological markers, including albumin, creatinine, and hemoglobin (Hb) and myeloma status including lactate dehydrogenase, beta 2‐microglobulin (B2M), ISS, and R‐ISS were relatively lower in the patients with social frailty than those without social frailty (Table 1).