Assessment of the performance of the body mass index in diagnosing obesity in community-dwelling older adults in Latin American and Caribbean countries

Assessment of the performance of the body mass index in diagnosing obesity in community-dwelling older adults in Latin American and Caribbean countries

OBESIDAD

INDICE DE MASA CORPORAL

COMPOSICION CORPORAL

ADULTOS MAYORES

BIBLIOGRAFIA NACIONAL QUIMICA

2024

Background: The body mass index (BMI) ≥30 kg/m2 is the universally accepted cut-off point for defining obesity; however, its accuracy in classifying obesity in older adults is poorly understood. Objectives: To assess the performance of the BMI cut-off point ≥30 kg/m2 in classifying obesity in older adults, using the fat mass index (FMI) and fat mass percentage (FM%) as reference criteria; and to establish region- and sex-specific BMI-based cut-off points to classify obesity in older adults. Methods: The present study is a secondary analysis derived from a cross-sectional project that included a sample of 1463 older adults from ten Latin American and Caribbean countries. Volunteers underwent total body water measurements using the deuterium dilution technique to determine FMI and FM%. Accuracy of the BMI and derived cutoff points was assessed by the area under the receiver operating characteristic curve (AUC).Results: The BMI cut-off point ≥30 kg/m2 had low sensitivity for classifying obesity in these older adults compared to the FMI and FM%. The AUC values for the optimal BMI-derived cut-off points showed an acceptable-to-outstanding discriminatory capacity in diagnosing obesity defined by the FMI. There was also a better balance between sensitivity and specificity than with the values obtained by a BMI ≥30 kg/m2 in older subjects in both regions. Conclusion: The BMI cut-off point ≥30 kg/m2 had poor sensitivity for accurately diagnosing obesity in older adults from two regions. The region- and sex-specific BMI-derived cut-off points for defining obesity using the FMI are more accurate in classifying obesity in older men and women subjects from both regions.

Alemán Mateo, Heliodoro

López Teros, Miriam T.

Pallaro, Anabel Nora

Márquez, Carlos

Quintana Guzmán, Eugenia María

Ramírez Zea, Manuel

Díaz Sánchez, María Elena

Umpiérrez, Eleuterio

Moirano, Marina

Badaloo, Asha

Rodriguez O’Donnell, Ada

Murphy Alford, Alexia J.

Ferrioli, Eduardo

Archives of gerontology and geriatrics v. 116, 2024. -- e105170

Elsevier

2024

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9 p.

Inglés

Artículo

10.1016/j.archger.2023.105170

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