A Cross-Sectional Study on the Association Between 24-h Urine Osmolality and Weight Status in Older Adults

Overview

Journal Nutrients

Date 2017 Nov 23

PMID 29165353

Citations 7

Authors

Patricia Padrao

Ana S Sousa

Rita S Guerra

Luisa Alvares

Alejandro Santos

Nuno Borges

Claudia Afonso

Teresa F Amaral

Pedro Moreira

Affiliations

Soon will be listed here.

Abstract

Data on the association between hydration and body weight in the elderly are scarce. The objective of this work was to quantify the association between 24-h urine osmolality and weight status in the elderly. A cross-sectional study was conducted within the Nutrition UP 65 study. A quota sampling was implemented to achieve a nationally representative sample of Portuguese older adults (≥65 years) according to age, sex, education and region. From a sample size of 1500 participants, 1315 were eligible for the present analysis, 57.3% were women and 23.5% were aged ≥80 years. Participants were grouped using tertiles of 24-h urine osmolality by sex. World Health Organization cutoffs were used to classify participants according to weight status. Multinomial multivariable logistic regression models were conducted to evaluate the association of tertiles of osmolality with weight status, adjusting for confounders. Odds Ratios (OR) and respective 95% Confidence Intervals (95% CI) were calculated. Being in the 3rd urine osmolality tertile (highest) was associated with a higher risk of being obese in men, OR = 1.97, 95% CI = 1.06, 3.66. No such association was found in women. These results highlight the need for implementing studies in order to clarify the association between hydration and weight status in the elderly.

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