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Mean urinary sodium and potassium excretion (mmol/24 h) by age groups. A, Aged 3–6 years; B, Aged 6–16 years; C, Aged ≥16 years. The red lines denote the recommended intakes for children (Chinese Proposed Intakes for Preventing Non‐communicable Chronic Disease for 4–6 and 11–13 year‐olds, respectively81, 82) and adults (World Health Organization recommendations6, 7).
