No Association between Neck Circumference and Free Triiodothyronine in Euthyroid Men
Table 1
Clinical characteristics of the study participants.
Variables
NC quartiles
for trend
Q1
Q2
Q3
Q4
N
184
191
179
183
—
Age (years)
62 (55–67)
62 (57–66)
61 (57–65)
59 (53–65)
0.026
BMI (kg/m2)
22.61 ± 2.68
23.38 ± 2.05
25.14 ± 1.97
27.76 ± 2.84
<0.001
NC (cm)
34.2 ± 1.4
37.1 ± 0.6
39.0 ± 0.5
41.4 ± 1.2
<0.001
WC (cm)
81.4 ± 7.7
84.8 ± 5.9
89.9 ± 5.7
96.3 ± 7.3
<0.001
SBP (mmHg)
132 (119–142)
131 (121–145)
133 (125–146)
140 (129–151)
<0.001
DBP (mmHg)
79 (72–85)
79 (72–86)
81 (75–88)
84 (77–91)
<0.001
FPG (mmol/L)
5.70 (5.36–6.30)
5.87 (5.44–6.49)
5.84 (5.47–6.45)
6.03 (5.56–6.89)
0.003
2hPG (mmol/L)
7.30 (5.66–8.86)
7.72 (6.23–9.72)
7.69 (6.21–9.76)
8.49 (6.34–11.88)
0.003
HbA1c (%)
5.6 (5.4–6.0)
5.7 (5.4–6.0)
5.7 (5.4–6.0)
5.8 (5.5–6.3)
0.006
Fasting insulin (mU/L)
6.66 (4.50–9.73)
7.42 (5.20–9.89)
9.02 (6.75–13.61)
11.64 (8.15–15.81)
<0.001
HOMA-IR
1.76 (1.18–2.65)
1.98 (1.41–2.84)
2.45 (1.81–3.69)
3.40 (2.17–4.90)
<0.001
TC (mmol/L)
5.06 ± 0.79
5.28 ± 1.00
5.16 ± 0.92
5.16 ± 0.92
0.139
TG (mmol/L)
1.25 (0.90–1.98)
1.47 (1.04–2.22)
1.61 (1.10–2.47)
1.78 (1.26–2.52)
<0.001
HDL-c (mmol/L)
1.34 (1.11–1.60)
1.25 (1.12–1.50)
1.21 (1.03–1.38)
1.15 (0.98–1.31)
<0.001
LDL-c (mmol/L)
3.06 ± 0.71
3.20 ± 0.89
3.21 ± 0.77
3.18 ± 0.75
0.243
CRP (mg/L)
0.58 (0.32–1.26)
0.79 (0.38–1.61)
0.97 (0.39–1.91)
1.03 (0.50–1.88)
<0.001
Data were expressed as mean ± standard deviation for normally distributed variables or the median (interquartile range) for skewed distribution variables. NC: neck circumference; BMI: body mass index; WC: waist circumference; SBP: systolic blood pressure; DBP: diastolic blood pressure; FPG: fasting plasma glucose; 2hPG: 2 h plasma glucose; HbA1c: glycated hemoglobin A1c; HOMA-IR: homeostasis model assessment-insulin resistance index; TC: total cholesterol; TG: triglyceride; HDL-c: high-density lipoprotein cholesterol; LDL-c: low-density lipoprotein cholesterol; CRP: C-reactive protein.
