Table 2.

Thyroid profile and caffeine intake in subgroups

	Subgroups					p
	Group 1		Group 2		Group 3
Thyroid function
TSH (mU/L)	1.63 (1.14, 2.32)	1.34 (0.94, 1.99)		1.48 (1.04, 2.16)		< 0.001
FT3 (pg/mL)	3.05 (2.82, 3.30)	3.25 (2.99, 3.50)		3.20 (3.00, 3.43)		< 0.001
FT4 (pmol/L)	10.30 (9.30, 11.60)	10.30 (9.00, 11.50)		10.30 (9.20, 11.60)		0.085
TPOAb (U/mL)	0.60 (0.30, 1.50)	0.60 (0.30, 1.20)		0.70 (0.40, 1.50)		0.002
TgAb (U/mL)	0.60 (0.60, 0.60)	0.60 (0.60, 0.60)		0.60 (0.60, 0.60)		0.004
Caffeine intake (mg/d)	87.5 (10.00, 201.00)	147.00 (59.00, 323.00)		85.00 (9.00, 205.00)		< 0.001

Data were presented as medians (percentile 25, percentile 75)