Développement et validation de questionnaires auto-rapportés visant l'évaluation de la consommation de sel chez la population adulte canadienne francophone

Authors: Proulx Belhumeur, Alexandra
Advisor: Gallani, Maria CeciliaGiguère, Jean-François
Abstract: Salt over intake has been considered a major public health problem. Nurses are in the front wave of the health care system, thus the development of effective nursing interventions aimed at promoting a healthier salt intake could contribute importantly to the population health. However, before intervening, it is essential to obtain a thorough and comprehensive understanding of the dietary patterns of salt intake in the target population, beginning with the quantification and the identification of the major sources of intake of the nutrient. Thus, this study had two objectives: 1) to develop two self-reported questionnaires for the French- Canadian adult population: a discretionary salt questionnaire (DSQ) and a specific foodfrequency questionnaire for salt (FFQ-Na) and 2) to demonstrate their measurement properties. The reliability of the tools was evaluated according to the criterion of temporal stability. Validity was evaluated by testing the tools against a 24-hour urine sodium (24h Uri- Na) and a 3-day food record, and this at an individual and a group levels. The ICC values for the test-retest of the DSQ, the FFQ-Na and the two questionnaires combined were 0.73, 0.97 and 0.98 respectively. The correlations of the FFQ-Na with the 24h Uri-Na and the 3-day food record were 0.30 (p<0.001) and 0.35 (p<0.001). The DSQ had no significant correlation with the reference measures. The correlation between the two methods combined were 0.29 (p<0.001) with the 24h Uri-Na and 0.31 (p<0.001) with the 3-day food record. The results of Bland–Altman indicated that for the combined questionnaires, there was a bias of measurement (underestimation of intake), but it was constant for every level of intake. Finally, the cross-classification indicated an acceptable proportion of agreement, but a rate between 20-30% of classification in the opposite quartile. In conclusion, the developed tools are reliable and demonstrate some facets of validity.
Document Type: Mémoire de maîtrise
Issue Date: 2018
Open Access Date: 25 September 2018
Permalink: http://hdl.handle.net/20.500.11794/31385
Grantor: Université Laval
Collection:Thèses et mémoires

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