1.Aburto, N, Ziolkovska, A, Hooper, L, et al. (2013) Effect of lower sodium intake on health: systematic review and meta-analyses. BMJ 346, f1326.
2.Chobanian, A, Bakris, G, Black, H, et al. (2003) Seventh report of the Joint National Committee on prevention, detection, evaluation, and treatment of high blood pressure. Hypertension 42, 1206–1252.
3.He, F, Li, J & Macgregor, G (2013) Effect of longer term modest salt reduction on blood pressure: Cochrane systematic review and meta-analysis of randomised trials. BMJ 346, f1325.
4.Koliaki, C & Katsilambros, N (2013) Dietary sodium, potassium, and alcohol: key players in the pathophysiology, prevention, and treatment of human hypertension. Nutr Rev 71, 402–411.
5.Mente, A, O’Donnell, M, Rangarajan, S, et al. (2014) Association of urinary sodium and potassium excretion with blood pressure. N Engl J Med 371, 601–611.
6.Strazzullo, P, D’Elia, L, Kandala, N, et al. (2009) Salt intake, stroke, and cardiovascular disease: meta-analysis of prospective studies. BMJ 339, b4567.
7.Mozaffarian, D, Fahimi, S, Singh, G, et al. (2014) Global sodium consumption and death from cardiovascular causes. N Engl J Med 371, 624–634.
8.World Health Organization (2007) Prevention of Cardiovascular Disease: Guidelines for Assessment and Management of Cardiovascular Risk. Geneva: WHO.
9.McLean, RM, Farmer, VL, Nettleton, A, et al. (2018) Twenty-four-hour diet recall and diet records compared with 24-hour urinary excretion to predict an individual’s sodium consumption: a systematic review. J Clin Hypertens 20, 1360–1376.
10.Lucko, A, Doktorchik, C, Woodward, M, et al. (2018) Percentage of ingested sodium excreted in 24-hour urine collections: A systematic review and meta-analysis. J Clin Hypertens 20, 1220–1229.
12.Cogswell, ME, Maalouf, J, Elliott, P, et al. (2015) Use of urine biomarkers to assess sodium intake: challenges and opportunities. Annu Rev Nutr 35, 349–387.
13.McLean, RM (2014) Measuring population sodium intake: a review of methods. Nutrients 6, 4651–4662.
14.Kawasaki, T, Itoh, K, Uezono, K, et al. (1993) A simple method for estimating 24 h urinary sodium and potassium excretion from second morning voiding urine specimen in adults. Clin Exp Pharmacol Physiol 20, 7–14.
15.Tanaka, T, Okamura, T, Miura, K, et al. (2002) A simple method to estimate populational 24-h urinary sodium and potassium excretion using a casual urine specimen. J Hum Hypertens 16, 97–103.
16.Brown, IJ, Dyer, AR, Chan, Q, et al. (2013) Estimating 24-hour urinary sodium excretion from casual urinary sodium concentrations in Western populations: the INTERSALT study. Am J Epidemiol 177, 1180–1192.
18.Cogswell, ME, Wang, CY, Chen, TC, et al. (2013) Validity of predictive equations for 24-h urinary sodium excretion in adults aged 18-39 y. Am J Clin Nutr 98, 1502–1513.
19.Kelly, C, Geaney, F, Fitzgerald, AP, et al. (2015) Validation of diet and urinary excretion derived estimates of sodium excretion against 24-h urine excretion in a worksite sample. Nutr Metab Cardiovasc Dis 25, 771–779.
20.McLean, R, Williams, S & Mann, J (2014) Monitoring population sodium intake using spot urine samples: validation in a New Zealand population. J Hum Hypertens 28, 657–662.
21.Zhou, L, Tian, Y, Fu, JJ, et al. (2017) Validation of spot urine in predicting 24-h sodium excretion at the individual level. Am J Clin Nutr 105, 1291–1296.
22.World Health Organization (2011) Strategies to monitor and evaluate population sodium consumption and sources of sodium in the diet: report of a joint technical meeting convened by WHO and the Government of Canada. Geneva: WHO.
23.Allen, NB, Zhao, L, Loria, CM, et al. (2017) The validity of predictive equations to estimate 24-hour sodium excretion: the MESA and CARDIA Urinary Sodium Study. Am J Epidemiol 186, 149–159.
24.Hooft van Huysduynen, EJ, Hulshof, PJ, van Lee, L, et al. (2014) Evaluation of using spot urine to replace 24 h urine sodium and potassium excretions. Public Health Nutr 17, 2505–2511.
25.Ji, C, Sykes, L, Paul, C, et al. (2012) Systematic review of studies comparing 24-hour and spot urine collections for estimating population salt intake. Rev Panam Salud Publica 32, 307–315.
26.Doenyas-Barak, K, Beberashvili, I, Bar-Chaim, A, et al. (2015) Daily sodium and potassium excretion can be estimated by scheduled spot urine collections. Nephron 130, 35–40.
27.Mann, SJ & Gerber, LM (2010) Estimation of 24-hour sodium excretion from spot urine samples. J Clin Hypertens 12, 174–180.
28.Uechi, K, Asakura, K, Ri, Y, et al. (2016) Advantage of multiple spot urine collections for estimating daily sodium excretion: comparison with two 24-h urine collections as reference. J Hypertens 34, 204–214.
29.Wang, CY, Cogswell, ME, Loria, CM, et al. (2013) Urinary excretion of sodium, potassium, and chloride, but not iodine, varies by timing of collection in a 24-hour calibration study. J Nutr 143, 1276–1282.
30.Lassale, C, Castetbon, K, Laporte, F, et al. (2015) Validation of a web-based, self-administered, non-consecutive-day dietary record tool against urinary biomarkers. Br J Nutr 113, 953–962.
31.Hercberg, S, Castetbon, K, Czernichow, S, et al. (2010) The Nutrinet-Santé Study: a web-based prospective study on the relationship between nutrition and health and determinants of dietary patterns and nutritional status. BMC Public Health 10, 242.
32.Castetbon, K, Vernay, M, Malon, A, et al. (2009) Dietary intake, physical activity and nutritional status in adults: the French nutrition and health survey (ENNS, 2006–2007). Br J Nutr 102, 733–743.
33.World Health Organization (1995) Physical status: the use and interpretation of anthropometry. Report of a WHO Expert Committee. WHO Technical Report Series, 8(54). Geneva: WHO.
34.Bland, JM & Altman, DG (1986) Statistical methods for assessing agreement between two methods of clinical measurement. Lancet I, 307–310.
35.Rhee, MY, Kim, JH, Shin, SJ, et al. (2014) Estimation of 24-hour urinary sodium excretion using spot urine samples. Nutrients 6, 2360–2375.
36.Mente, A, O’Donnell, MJ, Dagenais, G, et al. (2014) Validation and comparison of three formulae to estimate sodium and potassium excretion from a single morning fasting urine compared to 24-h measures in 11 countries. J Hypertens 32, 1005–1014.
37.Polonia, J, Lobo, MF, Martins, L, et al. (2017) Estimation of populational 24-h urinary sodium and potassium excretion from spot urine samples: evaluation of four formulas in a large national representative population. J Hypertens 35, 477–486.
38.Pfeiffer, CM, Hughes, JP, Cogswell, ME, et al. (2014) Urine sodium excretion increased slightly among U.S. adults between 1988 and 2010. J Nutr 144, 698–705.
39.Conkle, J & van der Haar, F (2016) The use and interpretation of sodium concentrations in casual (spot) urine collections for population surveillance and partitioning of dietary iodine intake sources. Nutrients 9, 1.
40.Cappuccio, F & D’Elia, L (2018) Evaluating population salt reduction programmes worldwide: the risk of cutting corners! Public Health Nutr 21, 2161–2163.
41.Dyer, AR, Martin, GJ, Burton, WN, et al. (1998) Blood pressure and diurnal variation in sodium, potassium, and water excretion. J Hum Hypertens 12, 363–371.
42.Stow, LR & Gumz, ML (2011) The circadian clock in the kidney. J Am Soc Nephrol 22, 598–604.
43.Rhodes, DG, Murayi, T, Clemens, JC, et al. (2013) The USDA Automated Multiple-Pass Method accurately assesses population sodium intakes. Am J Clin Nutr 97, 958–964.
44.Iwahori, T, Ueshima, H, Miyagawa, N, et al. (2014) Six random specimens of daytime casual urine on different days are sufficient to estimate daily sodium/potassium ratio in comparison to 7-day 24-h urine collections. Hypertens Res 37, 765–771.
45.Knuiman, JT, Hautvast, JG, van der Heijden, L, et al. (1986) A multi-centre study on within-person variability in the urinary excretion of sodium, potassium, calcium, magnesium and creatinine in 8 European centres. Hum Nutr Clin Nutr 40, 343–8.
46.Liu, K, Dyer, AR, Cooper, RS, et al. (1979) Can overnight urine replace 24-hour urine collection to asses salt intake? Hypertension 1, 529–536.
47.Ma, Y, Olendzki, BC, Pagoto, SL, et al. (2009) Number of 24-hour diet recalls needed to estimate energy intake. Ann Epidemiol 19, 553–559.
48.Andreeva, VA, Salanave, B, Castetbon, K, et al. (2015) Comparison of the sociodemographic characteristics of the large NutriNet-Santé e-cohort with French Census data: the issue of volunteer bias revisited. J Epidemiol Community Health 69, 893–898.
49.Unité de surveillance et d’épidémiologie nutritionnelle (2007) Etude nationale nutrition santé (ENNS, 2006). Situation nutritionnelle en France en 2006 selon les indicateurs d’objectif et les repères du Programme national nutrition santé (PNNS). Saint-Maurice: Institut de veille sanitaire. http://opac.invs.sante.fr/doc_num.php?explnum_id=3481 (accessed October 2018).