Suppressing Effect of Free Triiodothyronine on the Negative Association between Body Mass Index and Serum Osteocalcin Levels in Euthyroid Population

Table 1

Clinical characteristics of subjects.

Variables	N = 1152
Men/women	475/677
Age, years	59 (54–64)
BMI (kg/m^2)	23.30 (21.40–25.30)
SBP (mmHg)	128 (117–140)
DBP (mmHg)	77 (70–84)
FPG (mmol/L)	5.68 (5.35–6.09)
2hPG (mmol/L)	7.05 (5.76–8.65)
HbA1c, % (mmol/mol)	5.7 (39) [5.4 (36)–5.9 (41)]
TC (mmol/L)	5.36 (4.77–6.00)
TG (mmol/L)	1.34 (0.95–1.96)
HDL-c (mmol/L)	1.40 (1.19–1.66)
LDL-c (mmol/L)	3.25 (2.74–3.82)
FT3 (pmol/L)	4.93 (4.59–5.30)
FT4 (pmol/L)	16.41 ± 1.81
FT3/FT4	0.30 (0.28–0.33)
TSH (mIU/L)	2.33 (1.64–3.31)
OCN (ng/mL)	19.44 (15.69–24.78)
Physical activity
Light, N (%)	167 (14.50)
Moderate, N (%)	671 (58.20)
Heavy, N (%)	314 (27.30)

Note. Normally distributed variables were expressed as means ± SD, and skewed distributed variables were expressed as medians (interquartile ranges). Abbreviations: 2hPG, 2-hour plasma glucose; BMI, body mass index; DBP, diastolic blood pressure; FPG, fasting plasma glucose; FT3, free triiodothyronine; FT3/FT4, free triiodothyronine to free thyroxine ratio; FT4, free thyroxine; HbA1c, glycated hemoglobin A1c; HDL-c, high-density lipoprotein cholesterol; LDL-c, low-density lipoprotein cholesterol; OCN, osteocalcin; SBP, systolic blood pressure; TC, total cholesterol; TG, triglyceride; TSH, thyroid-stimulating hormone.