Table 3.
Bivariate correlation analysis between serum TSH or fT4 levels and demographic, anthropometric, biochemical and metabolic variables.
| Variables | TSH (mIU/L) | fT4 (pg/mL) | ||
|---|---|---|---|---|
| r | p | r | p | |
| Age (years) | -0.05 | <0.0001 | -0.04 | 0.002 |
| Smoking habit (No=0, Yes=1) | -0.25 | <0.0001 | -0.25 | <0.0001 |
| BMI (kg/m2) | 0.07 | <0.0001 | -0.05 | <0.0001 |
| WC (cm) | -0.01 | 0.65 | -0.06 | <0.0001 |
| Glucose (mg/dL) | -0.05 | 0.001 | 0.03 | 0.04 |
| Insulin (mIU/L) | 0.03 | 0.04 | -0.02 | 0.09 |
| HOMA-IR | -0.01 | 0.67 | -0.01 | 0.67 |
| CHO (mg/dL) | 0.04 | 0.006 | -0.02 | 0.20 |
| LDL-CHO (mg/dL) | 0.02 | 0.15 | -0.02 | 0.21 |
| HDL-CHO (mg/dL) | 0.04 | 0.007 | 0.07 | <0.0001 |
| TG (mg/dL) | 0.03 | 0.05 | -0.06 | <0.0001 |
| Leptin (μg/l)* | 0.14 | 0.002 | 0.01 | 0.91 |
| FM (%) | 0.11 | <0.0001 | 0.001 | 0.93 |
| FFM (kg) | -0.11 | <0.0001 | -0.001 | 0.94 |
Significant associations are shown in bold characters.
BMI, body mass index; CHO, cholesterol; FM, fat mass; FFM, fat-free mass; fT4, free thyroxine; HOMA-IR, Homeostatic Model of Insulin Resistance; REE, resting energy expenditure; TG, triglycerides; TSH, thyroid-stimulating hormone; WC, waist circumference.
*Leptin was measured in 502 patients.