Comparative analysis of morphofunctional parameters and clinical outcomes in post-critical patients according to the definition of obesity used: body mass index vs fat mass percentage
Brief Original Articles
Víctor José Simón Frapolli, Francisco José Tinahones, José Manuel García Almeida
Vol. 14, Num. 1 (2024): March 2024
Abstract:
Currently, both in epidemiological studies and in daily clinical practice, the most widely accepted way to classify the degree of excess weight in the adult population is based on body mass index (BMI), with obesity considered to be ≥30 kg/m2. BMI is a highly available but not very accurate parameter as it gives limited information on body composition, unlike parameters such as fat mass percentage (FM%), which can be estimated by anthropometry, bioimpedance, DEXA, air displacement plethysmography, CT and MRI. Of these, bioimpedance is an accurate, cheap, available, rapid and radiation-free alternative. According to the ESPEN and EASO Consensus Statement on sarcopenic obesity, obesity is defined as a body fat percentage (BF%) ≥30% in men and ≥40% in women, respectively. When we applied these cut-off points to define obesity in a cohort of post-critical patients after admission to ICU for COVID-19 pneumonia, compared to when we defined it as a BMI ≥ 30kg/m2, we found differences in body composition (especially in muscle mass parameters), as well as in comorbidities and longer hospital stay.
Keywords:
obesity, body composition, adiposity, morphofunctional, post-critical patient
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