ArticleObesity surgery2025
Preoperative Body Composition Analysis as a Predictor of Weight Loss Outcomes Following Bariatric Surgery: A Bioelectrical Impedance Study.
Article in Obesity surgery, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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6 authors.
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Abstract
backgroundBariatric surgery (BS) is an effective intervention for severe obesity, but some patients may experience sub-optimal weight loss. This study investigates the role of preoperative body composition parameters, measured via bioelectrical impedance analysis (BIA), in predicting postoperative weight loss outcomes.
methodsA retrospective analysis was conducted on 102 patients who underwent sleeve gastrectomy (SG), Roux-en-Y gastric bypass (RYGB), or one-anastomosis gastric bypass (OAGB) between January 2020 and April 2023. Preoperative body composition metrics, including fat mass (FM), fat-free mass (FFM), body cell mass (BCM), and phase angle (PhA), were correlated with percentages of excess weight loss (%EWL) and total weight loss (%TWL) at 12 months post-surgery.
resultsThe study found that patients with higher preoperative BCM and PhA showed significantly better weight loss outcomes. Specifically, patients with optimal weight loss had a mean BCM of 35.2 ± 3.5 kg and a PhA of 6.1 ± 0.5, whereas those with sub-optimal outcomes had a mean BCM of 29.8 ± 4.2 kg and a PhA of 4.9 ± 0.6 (p < 0.01 for both). Additionally, higher FM was associated with lower %EWL (r = - 0.40, p < 0.01). Multivariable logistic regression analysis identified BCM (OR 2.1, 95% CI 1.3-3.4) and %FM (OR 0.7, 95% CI 0.5-0.9) as independent predictors of successful weight loss.
conclusionsPreoperative BIA parameters, particularly BCM and %FM, are significantly associated with weight loss outcomes in BS patients. These findings suggest a potential role in guiding pre-surgical patient assessment and tailored care, while acknowledging that this relationship is correlational and not necessarily causal.
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