Table 1.

Epidemiological criteria for assessing iodine status of the pregnant population based on the median UIC

Population group	Median UIC (μg/l)	Iodine intake
Pregnant women	<150	Insufficient
	150–249	Adequate
	250–499	Above requirements
	≥500	Excessive†

UIC, urinary iodine concentration.

†The term ‘excessive’ means in excess of the amount required to prevent and control iodine deficiency – not necessarily a damaging excess.