Table 4.

Association of subclinical hypothyroidism, iodine nutritional status, and associated factors in participants with and without positive thyroid antibodies.

	Subclinical Hypothyroidism
	TPOAb (−)/TgAb (−)		TPOAb (+) or TgAb (+)
	OR (95% CI)	p	OR (95% CI)	p
BMI	1.062 (1.032, 1.093)	<0.001	1.033 (0.897, 1.190)	0.648
Ages
6–8	Reference		Reference
9–11	0.710 (0.555, 0.908)	0.006	1.141 (0.204, 6.392)	0.881
12–17	0.681 (0.484, 0.959)	0.028	0.355 (0.040, 3.171)	0.354
Sex
Male
Female	0.915 (0.745, 1.124)	0.398	1.591 (0.523, 4.840)	0.414
Region
Urban
Rural	0.915 (0.738, 1.134)	0.417	2.486 (0.782, 7.899)	0.123
UIC, µg/L
<100	0.978 (0.714, 1.340)	0.891	0.707 (0.119, 4.202)	0.703
100–199.9
200–299.9	0.893 (0.680, 1.172)	0.414	1.658 (0.432, 6.368)	0.461
≥300	0.739 (0.554, 0.985)	0.039	2.851 (0.628, 12.947)	0.175
UI/Cr, µg/g
<111.5 (Quartile 1)	0.765 (0.578, 1.013)	0.061	1.136 (0.294, 4.397)	0.853
111.5–241.8 (Quartile 2 + Quartile 3)
>241.8 (Quartile 4)	1.510 (1.175, 1.941)	0.001	1.207 (0.316, 4.615)	0.783

Bold remarks indicate statistically significant differences. Abbreviations: OR: odds ratio; 95% CI: 95% confidence interval; BMI, body mass index; UIC, urinary iodine concentration; UI/Cr, urinary iodine-to-creatinine ratio; TgAb, thyroglobulin antibody; TPOAb, thyroid peroxidase antibody.