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[Discordance between nutritional status and self perception of weight among adults from Talca, Chile]. | LitMetric

[Discordance between nutritional status and self perception of weight among adults from Talca, Chile].

Rev Med Chil

Departamento de Bioquímica Clínica e Inmunohematología, Facultad de Ciencias de Salud, Universidad de Talca, Talca, Chile.

Published: January 2009

AI Article Synopsis

Article Abstract

Background: Obesity is related to underestimation of one's own weight.

Aim: To determine the agreement between nutritional status and self perception of weight status in apparently healthy adults from Talca.

Subjects And Methods: Data were obtained from a survey applied at 1007 randomly selected subjects, aged 18-74 years old (66% women). The survey identified age, gender, educational level and socioeconomic status. Self-perception of weight was estimated with pictures representing the four nutritional status categories: underweight, normal, overweight and obese. Body Mass index (BMI, kg/m(2)) was calculated to determine nutritional status. Statistical analysis included kappa index, Bowman s symmetry test and a logistic regression model to calculate the odds ratio in different variables related to underestimation of weight.

Results: Seventy three percent of subjects were overweight or obese and 44% underestimated their nutritional status. Sixty percent of subjects with a BMI between 25 and 26 kg/m(2), perceived themselves as normal. A higher underestimation was observed in obese subjects (odds ratio (OR) 17.2 95% confidence intervals (CI) 10.9-27.1), in overweight individuals (OR 3.5 95% CI 2.3-5.3), in men (OR 1.5 95% CI 1.1-2.1) and in people aged from 45 to 59 years (OR 1.7 95% CI 1.0-2.7).

Conclusion: Almost half of studied population had an erroneous self-perception of weight, mainly due to underestimation. Obese subjects, males and people older than 45 years were those with the higher degree of underestimation.

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