Purpose: Bioelectrical Impedance Analysis (BIA) is a potential method for evaluating the overall body condition in people with severe motor and intellectual disabilities (SMID). However, previous studies insufficiently explore the body composition characteristics of this population. Notably, people with physical disabilities exhibit a spectrum of motor functions, including bedridden, turning over, sitting, standing, and walking independently. Despite this diversity, comparative studies investigating body composition in relation to specific motor functions are lacking. This study aims to elucidate the body composition characteristics among people with SMID-related physical disabilities and compare them across varying levels of motor function.
Methods: This study included 72 participants, and their body composition was assessed using BIA via the In Body S10. Participants were categorized into four groups based on their motor function: (i) bedridden, (ii) turning over, (iii) sitting, and (iv) standing and walking.
Results: Across all groups, participants exhibited higher body fat percentages, extracellular water to total body water ratios (ECW/TBW), and lower body mass index, skeletal muscle mass index (SMI), basal metabolic rate, and phase angle (PhA) values compared to normative ranges. The bedridden group demonstrated significantly lower body weight, basal metabolic rate, SMI, and PhA, and significantly higher body fat percentage and ECW/TBW compared to the standing and walking group.
Conclusion: BIA-based body composition assessment revealed distinct characteristics associated with different motor functions in people with SMID. Those with severe motor impairments exhibited a deterioration in body composition.
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