Table 3.

Effect of coffee consumption on serum thyroid function indicators.

Variable	Coffee	OR	95%CI		P
Hyperthyroidism	ref	ref	ref	ref	ref
	<2	0.33	0.05	2.20	0.26
	2-4	0.41	0.04	4.03	0.45
	>4	1.69	0.16	17.59	0.66
Hypothyroidism	ref	ref	ref	ref	ref
	<2	0.94	0.26	3.36	0.92
	2-4	0.54	0.13	2.24	0.40
	>4	1.98	0.52	7.45	0.32
Subclinical. Hyperthyroidism	ref	ref	ref	ref	ref
	<2	0.93	0.61	1.40	0.72
	2-4	1.03	0.58	1.82	0.93
	>4	0.98	0.46	2.07	0.96
Subclinical. Hypothyroidism	ref	ref	ref	ref	ref
	<2	0.60	0.41	0.89	0.015*
	2-4	0.89	0.59	1.36	0.61
	>4	0.65	0.25	1.72	0.40

**Tips less than 0.05, **Tips less than 0.01, Models adjusted for age, sex, education, ethnicity, smoking, alcohol, DM, hypertension, hyperlipidemia, BMI, and urinary iodine concentration.