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Table 3 Proportion of children in each WHO urinary iodine category [1]

From: Tanzania national survey on iodine deficiency: impact after twelve years of salt iodation

Population's status of iodine intake

Urinary iodine levels (μg/L)

Proportion of children

  

n

%

Cumulative %

Very insufficient (severe iodine deficiency)

Below 20

92

2.0

2.0

Insufficient (moderate iodine deficiency)

20 - 49.9

382

8.5

10.5

Insufficient (mild iodine deficiency)

50 - 99.9

654

14.5

25.0

Adequate iodine nutrition

100 - 199.9

1109

24.5

49.5

Above requirements (poses a slight risk*)

200 - 299.9

692

15.3

64.8

Excessive intake (poses a clear risk*)

300 and above

1594

35.2

100.0

Total

 

4523

100.0

 
  1. *Risk of adverse health consequences (iodine-induced hyperthyroidism and autoimmune thyroid diseases)