Fig. 2.

Salt intake between Wave 2 and Wave 3, according to age, sex, obesity and hypertension status. Box plots represent median and IQR. Independent samples with valid 24hr urine collections: Wave 2 (n = 750, blue) and Wave 3 (n = 548, red). P-values are from Mann–Whitney tests for differences between the waves. Analyses were adjusted for: age, ethnicity, location, marital status, education level, alcohol use, smoking status, waist-hip ratio, hypertension status at W3, SBP and DBP except if the variable was the categorizing factor. BMI: Body Mass Index; HTN: hypertensive; no HTN: not hypertensive. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)