Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/18509
Title: Beverage intake assessment questionnaire: relative validity and repeatability in a spanish population with metabolic syndrome from the PREDIMED-PLUS study
Authors: Ferreira-Pego, Cintia
Nissensohn, Mariela 
Kavouras, Stavros A.
Babio, Nancy
Serra-Majem, Lluis 
Martín Águila, Adys
Mauromoustakos, Andy
Salas-Salvadó, Jordi
Álvarez Pérez, Jacqueline 
UNESCO Clasification: 3206 Ciencias de la nutrición
Keywords: Relative validity
Repeatability
Fluid questionnaire
Beverages
PREDIMED-PLUSstudy, et al
Issue Date: 2016
Journal: Nutrients 
Abstract: We assess the repeatability and relative validity of a Spanish beverage intake questionnaire for assessing water intake from beverages. The present analysis was performed within the framework of the PREDIMED-PLUS trial. The study participants were adults (aged 55–75) with a BMI ≥27 and <40 kg/m2, and at least three components of Metabolic Syndrome (MetS). A trained dietitian completed the questionnaire. Participants provided 24-h urine samples, and the volume and urine osmolality were recorded. The repeatability of the baseline measurement at 6 and 1 year was examined by paired Student’s t-test comparisons. A total of 160 participants were included in the analysis. The Bland–Altman analysis showed relatively good agreement between total daily fluid intake assessed using the fluid-specific questionnaire, and urine osmolality and 24-h volume with parameter estimates of −0.65 and 0.22, respectively (R2 = 0.20; p < 0.001). In the repeatability test, no significant differences were found between neither type of beverage nor total daily fluid intake at 6 months and 1-year assessment, compared to baseline. The proposed fluid-specific assessment questionnaire designed to assess the consumption of water and other beverages in Spanish adult individuals was found to be relatively valid with good repeatability.
URI: http://hdl.handle.net/10553/18509
ISSN: 2072-6643
DOI: 10.3390/nu8080475
Source: Nutrients [ISSN 2072-6643], v.8 (8), p. 475
Rights: by-nc-nd
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