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. 2022 Jan 18;61(4):2143–2151. doi: 10.1007/s00394-022-02801-6

Fig. 4.

Fig. 4

Changes in contribution of iodized salt to total salt intake in DONALD 6–12-year-old schoolchildren over 2 decades till 2018 and comparison with respective nationwide KiGGS-2 data. Estimation of the proportion of iodized salt intake to total salt intake was done by calculation of the median amount of urinary iodine stemming from total salt intake (i.e., sodium excretion) using regressions of predicted values according to Esche et al. [7] and Haldimann et al. [20] (see also Statistical analysis)