Table 1. Characteristics of the Study Population by Gender^a.

	Women	Men	P Value
Number	32563	45428	-
Age, y	41 (31 - 50)	44 (34 - 52)	< 0.001
BMI, kg/m2	22.18 ± 3.03	24.53 ± 3.09	< 0.001
TSH, mIU/L	2.20 (1.57 - 2.99)	1.89 (1.36 - 2.58)	< 0.001
FT3, pmol/L	4.43 (4.09 - 4.78)	4.39 (4.75 - 5.10)	< 0.001
FT4, pmol/L	12.69 ± 1.35	12.69 ± 1.43	0.810

Abbreviations: BMI, body mass index; FT3, free triiodothyronine; FT4, free thyroxine; TSH, thyroid-stimulating hormone.

^aP <0.05 is considered statistically significant.