Seeking an Initial-Weight-Independent Metric in a Mediterranean Cohort of Gastric Bypass Patients: the %AWL Revisited.
Obes Surg
; 31(4): 1524-1532, 2021 Apr.
Article
em En
| MEDLINE
| ID: mdl-33398625
ABSTRACT
BACKGROUND:
Most relative weight-loss metrics follow the formula "Weight loss(%) = 100 · (Initial BMI - Final BMI) / (Initial BMI-a)," where a is the reference point that defines the metric. The percentage of total weight loss (%TWL, a = 0) and percentage of excess weight loss (%EWL, a = 25) are influenced by a patient's initial weight. Recently, the percentage of alterable weight loss metric (%AWL, a = 13) has been reported to produce initial-weight-independent outcomes.OBJECTIVES:
This study aimed to replicate the methodology used for %AWL determination in a Mediterranean cohort of bariatric patients. SETTINGS Multicenter study in 10 large hospitals in Spain.METHODS:
Two large prospective databases were retrospectively searched for all primary laparoscopic gastric bypass patients with 2 years of follow-up. Outcomes at nadir were expressed and analyzed with 26 different metrics (a from 0 to 25), looking for the metric whose outcomes produced (1) the lowest coefficient of variation, (2) no differences between initially lighter and heavier patients, and (3) no correlation with patients' initial BMI.RESULTS:
A cohort of 1793 patients was stratified into 4 gender-age groups younger women (YW, n = 733), older women (OW, n = 674), younger men (YM, n = 197), and older men (OM, n = 189). The calculations suggested an optimal reference point of 18 kg/m2, defining a new metric (percentage of Mediterranean alterable weight loss, %MAWL). When %TWL, %EWL, %AWL, and %MAWL were tested on the whole sample, only %MAWL produced initial-weight-independent results.CONCLUSIONS:
In our Mediterranean cohort of patients, a reference point of 18 (and not 13) yielded initial-weight-independent outcomes.Palavras-chave
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Obesidade Mórbida
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Derivação Gástrica
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Laparoscopia
Tipo de estudo:
Observational_studies
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Risk_factors_studies
Limite:
Aged
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Female
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Humans
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Male
País como assunto:
Europa
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article