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Background The evaluation of body composition is an essential parameter for preventing obesity and sarcopenic obesity, which are prognostic factors in breast cancer. This study aims to validate the bioelectrical impedance analysis (BIA) of women who are breast cancer survivors by using the dual‐energy x‐ray absorptiometry (DXA) measurement method. Methods This validation study included 104 women without metastasis between 32 and 72 years old (mean 47.03 ± 8.59) whose treatment was completed 6 months prior. Body composition analysis was performed sequentially using both measurements and when participants were hungry. Results Meaningful differences were found in fat‐free mass (FFM) (BIA: 46.57 ± 5.54 kg; DXA: 41.06 ± 5.11 kg), body fat percentage (%BF) (BIA: 34.28% ± 6.24%; DXA: 43.91% ± 5.58%), body fat mass (FM) (BIA: 25.37 ± 8.84 kg; DXA: 31.24 ± 9.09 kg), and lean soft tissue mass (LSTM) (BIA: 4.42 ± 5.66 kg; DXA: 38.75 ± 4.98 kg) (P < 0.001). Powerful associations for body FM and strong associations for other parameters were seen. A constant and/or proportional error was found between the two devices within the direction of strong and solid components. Compared with DXA, the BIA measurement gives a lower estimate of %BF and FM and a higher estimate of LSTM and FFM. Conclusions By the mathematical relationship between the two measurement methods, it seems possible to adapt the body composition parameters obtained from BIA of patients with breast cancer to DXA results. In the future, there will be a need to evaluate these two devices with more extensive studies.

This study investigates the outcomes of virtual nutritional counseling (VNC) for oncology patients during the Covid-19 pandemic. Our study evaluated the nutritional status data of cancer patients at the baseline and after VNC. An oncology dietitian evaluated the patients by video calling each patient via WhatsApp and sent an individual nutrition diet plan and recommendations via e-mail. Patient-Generated Subjective Global Assessment (PG-SGA) was used as a screening and evaluation tool to assess nutritional status. A total of 157 patients with a mean age of 55.8 ± 14.7 ( r = 19–89) were included in the study. Researchers detected at least one nutrition-related sign in 77.7% of patients. After the VNC and based on the final PG-SGA assessments, 62.2% of the patients whose baseline PG-SGA Score-B improved to Score-A, 12.5% with a baseline PG-SGA Score-C improved to Score-A and 54.2% with a baseline Score-C improved to a Score-B ( χ2 = 55,000, P < 0.001). Based on the number of VNCs, the improvement in malnutrition status following two sessions and three or more sessions was found to be 17.6% and 35.7%, respectively ( P < 0.001). Our results confirm that VNC can improve the nutritional status of cancer patients. Hence, nutritional counseling should be an integral part of oncological treatment.