Strength, water compartments and phase angle in breast cancer survivors

• Autor(a) principal: Reis, Mafalda Maria Travado
• Data de Publicação: 2016
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.5/12993
• topic: Breast cancer; Phase angle; Muscular strength; Water compartments; Bioelectrical impedance spectroscopy; Extracellular water; Intracellular water; Waist circumference; Hip circumference; Physical activity; Cancro da mama; Ângulo de fase; Força muscular; Compartimentos hídricos; Bioimpedância elétrica multiespectral; Água extracelular; Água intracelular; Perímetro da cintura; Perímetro da anca; Atividade física; Domínio/Área Científica::Ciências Médicas::Ciências da Saúde

Background: Accurate prognostic tools are determinant for decision-making in cancer care planning. Objective measures such as bioelectrical impedance spectroscopy (BIS) may improve the accuracy of prognostic. In this cross-sectional study the goal was to determine if the water compartments and the phase angle were predictors of muscular strength in breast cancer survivors (BCS). Methods: A total of 41 BCS (age 54.6 ± 9.2) were evaluated. Water compartments and phase angle were assessed with BIS and muscular strength was assessed with handgrip dynamometer. Moderate-to-vigorous physical activity (MVPA) was assessed using the International Physical Activity Questionnaire (IPAQ). Measurements were performed in the morning after an overnight feast. Results: Linear regression analysis showed that phase angle explained 22% (r2 = 0.216) of the variance of the handgrip. Independently of MVPA and time post-operation, phase angle remained a significant predictor (B=2.269, p=0.085). No associations were found between water compartments and handgrip strength (p>0.05). Conclusions: The findings of this study suggest that phase angle is an important predictor of muscular strength in breast cancer survivors.