Table 2. Association of BMI and waist circumference with natural logarithm-transformed hormone concentrations, NHANES 2007–2008.
| Men | Women | |||
| % increasea | P-trend | % increasea | P-trend | |
| No. participants | n = 1,623 | n = 1,491 | ||
| TSH (mIU/L) | ||||
| BMI (per quartile increase) | 3.8 (0.8, 6.8) | 0.02 | 4.0 (1.6, 6.5) | 0.003 |
| Waist (per quartile increase) | 3.1 (0.6, 5.6) | 0.02 | 3.6 (1.2, 6.0) | 0.01 |
| fT3 (pg/mL) | ||||
| BMI (per quartile increase) | 1.0 (0.5, 1.5) | 0.001 | 1.3 (0.7, 1.8) | <0.001 |
| Waist (per quartile increase) | 1.2 (0.8, 1.7) | <0.001 | 1.2 (0.6, 1.8) | <0.001 |
| fT4 (ng/dL) | ||||
| BMI (per quartile increase) | −0.5 (−1.2, 0.3) | 0.21 | −0.7 (−1.6, 0.3) | 0.14 |
| Waist (per quartile increase) | −0.4 (−1.5, 0.6) | 0.40 | −0.6 (−1.5, 0.3) | 0.19 |
a
Adjusted for age, race, smoking status, and alcohol intake.