Beside many risk factors in patients considered for alloHCT, only body mass index (BMI) as a broad marker of nutritional status has prognostic value in these patients. This is the first prospective study to investigate the validity of further nutritional markers: adjusted BMI, normalized for gender and age; Subjective Global Assessment questionnaire and standardized phase angle, normalized for gender, age and BMI in 105 patients as independent risk factors for outcomes [overall survival (OS), non-relapse mortality (NRM), relapse mortality (RM), progression-free survival (PFS)] until 2 years after alloHCT. In Cox proportional-hazards regression models, we included a variety of accepted risk factors. The two most influential pre-transplant risk factors identified and associated with similarly increased hazard ratios (HR) for OS, RM, and PFS were a low-standardized phase angle (HR = 1.97, P = 0.043; HR = 3.18, P = 0.017, and HR = 1.91, P = 0.039) and advanced disease. Under- and overweight according BMI percentiles (≤10th; ≥90th) revealed associations with increased risk of NRM (HR = 2.90, P = 0.018; HR = 3.02, P = 0.062), although only low BMI was weakly associated with OS (HR = 1.82, P = 0.09). In conclusion, our results demonstrate that pre-transplant phase angle is an independent predictor for 2-year outcomes in these patients. Further investigation is necessary to demonstrate whether the theoretically modifiable phase angle can be increased by physical training combined with nutritional support, and if this improves outcome after alloHCT.

There are few longitudinal data on nutritional status and body composition of patients undergoing allogeneic hematopoietic cell transplantation (alloHCT). We assessed nutritional status of 105 patients before alloHCT and its course during the early posttransplant period to day þ 30 and day þ 100 via weight history, body mass index (BMI) normalized for gender and age, Subjective Global Assessment, phase angle normalized for gender, age, and BMI, and fat-free and body fat masses. Furthermore, we present a multivariate regression model investigating the impact of factors on body weight. At admission, 23.8% reported significant weight losses (45%) in the previous 6 months, and we noted 31.5% with abnormal age-and sex-adjusted BMI values (p10th, X90th percentiles). BMI decreased significantly (Po0.0001) in both periods by 11% in total, meaning a weight loss of 8.6 ± 5.7 kg. Simultaneously, the patients experienced significant losses (Po0.0001) of both fat-free and body fat masses. Multivariate regression model revealed clinically relevant acute GVHD (parameter estimate 1.43; P ¼ 0.02) and moderate/severe anorexia (parameter estimate 1.07; P ¼ 0.058) as independent factors influencing early weight loss. In conclusion, our results show a significant deterioration in nutritional status during the early post-transplant period. Predominant alloHCT-associated complications such as anorexia and acute GVHD became evident as significant factors influencing nutritional status.

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