Key result
A body shape index (ABSI) independently predicted fat-free mass index in overweight and obese women undergoing orthopaedic surgery, indicating its utility as a predictor of sarcopenic obesity.
Why the study?
The prevalence of sarcopenic obesity in patients undergoing orthopaedic surgery, and whether a body shape index (ABSI) can predict sarcopenic obesity and fat-free mass index, were unknown.
Cross-Sectional (n=209)
No
ABSI independently predicts fat-free mass index in women and may serve as a useful surrogate marker for identifying sarcopenic obesity in female orthopaedic patients.
Answers are grounded in this paper and cite their sources.
May aid preoperative sarcopenic obesity screening in obese women; hypothesis-generating and requires prospective validation before clinical use.
BACKGROUND: Sarcopenic obesity is a condition characterised by the coexistence of low muscle mass and function (sarcopenia) and excessive fat mass (obesity). The aim of this study was to determine the prevalence of this condition in patients undergoing orthopaedic surgery by gender and type of orthopaedic surgery. In addition, this study investigated the suitability of a waist circumference-based anthropometric measure, body shape index (ABSI), for predicting sarcopenic obesity and the predictive power of ABSI for fat-free mass index (FFMI), a surrogate marker of lean body mass. METHODS AND FINDINGS: A cross-sectional study of overweight and obese orthopaedic patients undergoing knee or hip and spine surgery was conducted between October 2019 and March 2020 in Orthopaedic Hospital Valdoltra, Slovenia. General anthropometric parameters body mass index (BMI) and ABSI = (WC/(BMI2/3x height½) as well as body composition data (fat mass FM, fat-free mass FFM, FFMI, and the ratio FM/FFM as an index of sarcopenic obesity) were determined in 120 women (aged 66.5 ± 9.6 years) and 89 men (aged 65.5 ± 7.8 years) with overweight (25 kg/m2 ≤ BMI < 30 kg/m2) and obesity (BMI ≥ 30 kg/m2) by bioelectrical impedance analysis (BIA). Sarcopenic obesity phenotypes based on FM/FFM ratio > 0.80 was present in 15.3% of patients, mainly in female patients undergoing knee surgery. ABSI was significantly associated with age in all women and obese men and with waist circumference (WC) in all patients. ABSI did not correlate with BMI in women and men; however, multiple linear regression analysis showed that BMI independently predicted FFMI (R = 0.83 and 0.70, respectively, p < 0.001) in women and men (β-coefficients: 0.801 and 0.686, respectively) and ABSI in women only (β-coefficient: -0.104). Women with a lower ABSI had a significantly higher FFMI than the group with a higher ABSI. CONCLUSIONS: Sarcopenic obesity was most prevalent in obese women scheduled for knee surgery. In addition, ABSI, independently predicted FFMI in women and represents a significant predictor of sarcopenic obesity.
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Tomažič et al. (2022) conducted a cross-sectional in Overweight and obesity in orthopaedic surgery patients (n=209). A body shape index (ABSI) vs. Lower ABSI was evaluated on Fat-free mass index (FFMI) (β = -0.104, p=<0.05). A body shape index (ABSI) independently predicted fat-free mass index in overweight and obese women undergoing orthopaedic surgery, indicating its utility as a predictor of sarcopenic obesity.
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