Table 2. Associations between H. pylori infection and thyroid function or thyroid nodules (TNs).

Variables	Unadjusted	Model 1	Model 2	Model 3
	Crude OR (95% CI)	aOR (95% CI)	aOR (95% CI)	aOR (95% CI)
TSH	0.966 (0.837-1.115)	0.953 (0.825-1.101)	0.977 (0.843-1.132)	0.961 (0.828-1.115)
FT4	0.916 (0.866-0.969)*	0.930 (0.878-0.985)*	0.912 (0.859-0.968)*	0.912 (0.859-0.969)*
FT3	1.158 (0.919-1.459)	1.220 (0.965-1.544)	1.153 (0.896-1.485)	1.116 (0.865-1.439)
TNs	1.486 (1.154-1.912)*	1.367 (1.049-1.780)*	1.432 (1.094-1.874)*	1.388 (1.059-1.819)*

Model 1: adjusted for age Model 2: adjusted for age and gender.

Model 3: adjusted for age, gender and body mass index.

^* P < 0.05

Abbreviations: TSH, thyroid-stimulating hormone; FT4, free thyroxine; FT3, free triiodothyronine; OR, odds ratio; CI, confidence interval.