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Underweight status at diagnosis is associated with poorer outcomes in adult patients with acute myeloid leukemia: a retrospective study of JALSG AML 201.
Annals of Hematology 2018 January
Recent studies have described various impacts of obesity and being overweight on acute myeloid leukemia (AML) outcomes in adult patients, but little is known about the impact of being underweight. We compared the outcomes of underweight patients to those of normal weight and overweight patients. Adult patients with AML who registered in the JALSG AML201 study (n = 1057) were classified into three groups: underweight (body mass index [BMI] < 18.5, n = 92), normal weight (BMI 18.5-25, n = 746), and overweight (BMI ≥ 25, n = 219). With the exception of age and male/female ratio, patient characteristics were comparable among the three groups. Rates of complete remission following induction chemotherapy were similar among the three groups (p = 0.68). We observed a significant difference in overall survival (OS), disease-free survival (DFS), and non-relapse mortality (NRM) between underweight and normal weight patients (3-year OS 34.8 vs. 47.7%, p = 0.01; DFS 28.6 vs. 39.8%, p = 0.02; 1-year NRM 6.2 vs. 2.6%, p = 0.05), but not between underweight and overweight patients. In multivariate analysis, underweight was an independent adverse prognostic factor for OS (p < 0.01), DFS (p = 0.01), and NRM (p = 0.04). During the first induction chemotherapy, the incidences of documented infection (DI) and severe adverse events (AEs) were higher in underweight patients than those in normal weight patients (DI 16 vs. 8.1%, p = 0.04; AE 36 vs. 24%, p = 0.05). In conclusion, underweight was an independent adverse prognostic factor for survival in adult AML patients.
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