Association of High Vitamin D Status with Low Circulating Thyroid-Stimulating Hormone Independent of Thyroid Hormone Levels in Middle-Aged and Elderly Males

Table 2

Comparison of clinical and laboratory characteristics based on vitamin D insufficiency.

	Vitamin D insufficiency (1368)	Nonvitamin D insufficiency (56)	P value
Age (years)	59.07 ± 8.55	60.07 ± 8.11	0.371
Male sex (n (%))	529 (38.67%)	32 (57.14%)	0.006
BMI (kg/m^2)	24.79 ± 3.40	24.21 ± 2.50	0.106
Serum FT3 (pmol/L)	4.39 (3.97–4.69)	4.48 (4.18–4.75)	0.094
Serum FT4 (pmol/L)	15.51 (13.14–17.93)	16.29 (14.01–18.79)	0.092
Serum TSH (μIU/mL)	3.42 (1.62–4.18)	2.47 (1.54–3.24)	0.000
Serum TgAb (IU/mL)	84.26 (7.26–27.77)	21.12 (8.38–22.40)	0.000
Serum TPOAb (IU/mL)	40.45 (1.17–14.33)	16.77 (0.99–14.99)	0.000
Thyroid volume (mL)	8.43 (6.12–9.35)	8.71 (6.53–10.62)	0.476
Presence of thyroid nodule(s) (n (%))	495 (36.18%)	18 (32.14%)	0.537
Current smokers (n (%))	814 (59.50%)	37 (66.07%)	0.326