biostudies-literatureBeer-Borst SSwiss National Science Foundation2983-2994https://www.ebi.ac.uk/biostudies/studies/S-EPMC7613718biostudies-literatureUnknown25(11)<h4>Objective</h4>Monitoring population salt intake is operationally and economically challenging. We explored whether a questionnaire assessment and a prediction of Na intake from spot-urine could replace or complement the recommended measurement of Na in 24-h urine (24-h U).<h4>Design</h4>Compare the agreement of a Na-specific food record checklist (FRCL) and a late-afternoon spot-urine measurement (PM-spot) with 24-h U measurement in estimating Na intake at group level. Each participant's use of these methods extended over 3 d. Agreement was assessed using mean (95 % CI) differences, linear regression models and Bland-Altman plots.<h4>Setting</h4>The validation study was part of a 1-year workplace intervention trial to lower salt intake in Switzerland.<h4>Participants</h4>Seventy women Public health nutritionValidation of salt intake measurements: comparisons of a food record checklist and spot-urine collection to 24-h urine collection.PMC7613718145149Grea Krause CStrazzullo PHayoz SBeer-Borst SfalseValidation of salt intake measurements: comparisons of a food record checklist and spot-urine collection to 24-h urine collection.<h4>Objective</h4>Monitoring population salt intake is operationally and economically challenging. We explored whether a questionnaire assessment and a prediction of Na intake from spot-urine could replace or complement the recommended measurement of Na in 24-h urine (24-h U).<h4>Design</h4>Compare the agreement of a Na-specific food record checklist (FRCL) and a late-afternoon spot-urine measurement (PM-spot) with 24-h U measurement in estimating Na intake at group level. Each participant's use of these methods extended over 3 d. Agreement was assessed using mean (95 % CI) differences, linear regression models and Bland-Altman plots.<h4>Setting</h4>The validation study was part of a 1-year workplace intervention trial to lower salt intake in Switzerland.<h4>Participants</h4>Seventy women 2022-01-01T00:00:00Z2022 Nov2025-04-04T02:25:44.922Z2025-04-04T02:25:44.922ZS-EPMC76137183585071610.1017/S1368980022001537