Iodine Deficiency in Patients with Hypothyroidism: A Pilot Study

Table 2

Prevalence of iodine deficiency.

		(S)H	Control	value
Urinary iodine excretion (µg)	Median	123.2	132.3	0.391^2
	Min–Max	30.8–725.0	29.3–368.9
	IQR	93.8–173.4	103.2–180.5
Iodine deficiency^a	Yes (%)	54.2%	41.7%	0.564^1
Urinary iodine	Median	71.5	81.5	0.568^2
Concentration (µg/L)	Min–Max	38–500	43–188
	IQR	44–133.5	55.8–112.8
Iodine deficiency^b	Yes (%)	54.2%	45.8%	0.773^1
Iodine creatinine ratio (µmol/mmol)	Median	0.09	0.08	0.640^2
	Min-Max	0.02–0.56	0.02–0.21
	IQR	0.06–0.11	0.07–0.12
Iodine deficiency^c	Yes (%)	91.7%	87.5%	1.000^1

^aIodine deficiency was defined as an iodine level <125 µg, ^bIodine deficiency was defined as an iodine concentration <100 µg/L, ^cIodine deficiency was defined as an iodine creatinine ratio <0.13, ¹Fisher exact test, ²Mann–Whitney U test; (S)H, overt or subclinical hypothyroidism.