Table 5.

Association between thyroid nodules, iodine nutritional status, and associated factors in participants with and without positive thyroid antibodies.

	Thyroid Nodules
	TPOAb (−)/TgAb (−)		TPOAb (+) or TgAb (+)
	OR (95% CI)	p	OR (95% CI)	p
BMI	1.005 (0.981, 1.029)	0.707	1.086 (0.914, 1.291)	0.349
Ages
6–8	Reference		Reference
9–11	0.843 (0.677, 1.049)	0.126	0.947 (0.205, 4.376)	0.945
12–17	0.428 (0.325, 0.564)	<0.001	0.585 (0.087, 3.946)	0.582
Sex
Male
Female	0.780 (0.662, 0.920)	0.003	0.721 (0.207, 2.510)	0.607
Region
Urban
Rural	1.512 (1.267, 1.804)	<0.001	1.018 (0.305, 3.405)	0.976
UIC, µg/L
<100	0.879 (0.683, 1.130)	0.314	0.413 (0.099, 1.731)	0.227
100–199.9
200–299.9	0.805 (0.645, 1.005)	0.055	0.640 (0.167, 2.451)	0.515
≥300	0.878 (0.692, 1.113)	0.281	1.543 (0.297, 8.010)	0.606
UI/Cr, µg/g
<111.5 (Quartile 1)	1.088 (0.878, 1.348)	0.441	1.345 (0.380, 4.756)	0.646
111.5–241.8 (Quartile 2 + Quartile 3)
>241.8 (Quartile 4)	1.197 (0.962, 1.489)	0.107	0.506 (0.123, 2.076)	0.344

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.