Wen X, et al. - Researchers used data from the International Study of Macro- and Micro-nutrients and Blood Pressure (INTERMAP) and performed both population and individual levels comparisons between 24-h dietary recalls vs 24-h urine collections for the estimation of sodium intake in China, Japan, the United Kingdom (UK), and the United States of America (USA). They estimated mean differences between 24-h dietary recalls and 24-h urine collections, to determine their agreement in estimating sodium intake at the population level. The agreement at the individual level was determined by using relative and absolute differences as well as misclassification of salt intake groups (salt intake <6, 6–8.9, 9–11.9, 12–14.9, and ≥15 g/day). For estimating population sodium intake for Japan, UK, and USA, compared with China, the 24-h dietary recalls displayed a greater agreement with the 24-h urine collections. In evaluating individual sodium intake in these four countries, the 24-h dietary recall displayed a poor performance.