The potential of nighttime urine samples for epidemiologic research on sodium intake: evidence from a population-based cohort study in Switzerland
Background - The gold standard for measuring sodium intake is based on multiple 24-h urine sodium (UNa) collections, which are logistically complex and pose a high burden on study participants. Its major alternative, spot urine sampling, has been shown to lead to systematic bias in sodium intake est...
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| Hauptverfasser: | , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
August 2025
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| In: |
The American journal of clinical nutrition
Year: 2025, Jahrgang: 122, Heft: 2, Pages: 624-634 |
| ISSN: | 1938-3207 |
| DOI: | 10.1016/j.ajcnut.2025.05.031 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.ajcnut.2025.05.031 Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0002916525003193 
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| Verfasserangaben: | Pascal Geldsetzer, Arthur Jaques, Nancy R Cook, Paul K Whelton, Stephan JL Bakker, Menno Pruijm, Murielle Bochud, Belen Ponte, Till Bärnighausen, Jonathan Rodean |
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| 245 | 1 | 4 | |a The potential of nighttime urine samples for epidemiologic research on sodium intake |b evidence from a population-based cohort study in Switzerland |c Pascal Geldsetzer, Arthur Jaques, Nancy R Cook, Paul K Whelton, Stephan JL Bakker, Menno Pruijm, Murielle Bochud, Belen Ponte, Till Bärnighausen, Jonathan Rodean |
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| 520 | |a Background - The gold standard for measuring sodium intake is based on multiple 24-h urine sodium (UNa) collections, which are logistically complex and pose a high burden on study participants. Its major alternative, spot urine sampling, has been shown to lead to systematic bias in sodium intake estimation. Nighttime urine collections are a potential alternative, as they place a substantially lower burden on participants and are thus less likely to lead to underestimation of UNa compared with 24-h urinary collections. - Objectives - We examined the possibility of estimating 24-h UNa excretion using nighttime collections only, both at the individual and population level. - Methods - We used the data from the Swiss kidney project on genes in the hypertension cohort, containing 1757 24-h urine collections from 1090 individuals, divided into daytime and nighttime samples. The participants were adults of European ancestry living in Switzerland. We examined the ability to predict 24-h UNa excretion based on nighttime collections using the following 3 methods for sodium estimation: 1) normalization by collection duration, 2) normalization by mean urine volume, and 3) multivariable linear regression models. - Results - The Pearson correlation coefficient for nighttime collections compared with the 24-h measurements were 0.661, 0.651, and 0.682-0.749 (depending on the regression model specifications) using the 3 nighttime collection methods of sodium estimation, respectively. All of the estimation methods led to different probability distributions from the target distribution. Method 1 showed systematic negative bias, method 1 and method 2 showed bias with respect to diabetes and hypertension status, and method 3 showed an overestimation of low excretion and an underestimation of high excretion. - Conclusions - Estimating 24-h UNa excretion based on nighttime collections was found to be imprecise and/or biased at the individual level and failed to capture population-level characteristics beyond central tendency. | ||
| 650 | 4 | |a 24-h urine collection | |
| 650 | 4 | |a nighttime urine collection | |
| 650 | 4 | |a prediction | |
| 650 | 4 | |a urinary sodium | |
| 650 | 4 | |a validation | |
| 700 | 1 | |a Jaques, Arthur |e VerfasserIn |4 aut | |
| 700 | 1 | |a Cook, Nancy R |e VerfasserIn |4 aut | |
| 700 | 1 | |a Whelton, Paul K |e VerfasserIn |4 aut | |
| 700 | 1 | |a Bakker, Stephan JL |e VerfasserIn |4 aut | |
| 700 | 1 | |a Pruijm, Menno |e VerfasserIn |4 aut | |
| 700 | 1 | |a Bochud, Murielle |e VerfasserIn |4 aut | |
| 700 | 1 | |a Ponte, Belen |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Rodean, Jonathan |e VerfasserIn |4 aut | |
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