Table 2.
Characteristics of subjects according to TPO-Ab status
| Characteristic | Total (n = 5,502) | TPO-Ab (–) (n = 5,072) | TPO-Ab (+) (n = 430) | p value |
|---|---|---|---|---|
| Age, yr | 51.9 ± 8.3 | 51.8 ± 8.3 | 52.6 ± 8.1 | 0.05 |
| Age quartilea | 0.34 | |||
| Q1 | 1,183 | 1,094 (92.3) | 89 (7.5) | |
| Q2 | 1,477 | 1,375 (93.1) | 102 (6.9) | |
| Q3 | 1,268 | 1,164 (91.8) | 104 (8.2) | |
| Q4 | 1,574 | 1,439 (91.4) | 135 (8.6) | |
| Female sex | 2,353 (42.8) | 2,077 (41.0) | 276 (64.2) | < 0.01 |
| TSH, mU/Lb | 2.2 ± 2.1 | 2.1 ± 2.0 | 2.7 ± 3.0 | < 0.01 |
| Free T4, ng/dL | 1.3 ± 0.2 | 1.3 ± 0.2 | 1.2 ± 0.3 | 0.29 |
Values are presented as mean ± SD or number (%).
TOP-Ab, thyroid peroxidase antibody; TSH, thyroid stimulating hormone; T4, thyroxine.
a
Age was stratified by quartile. The quartiles were 30 to 45 (Q1), 46 to 51 (Q2), 52 to 56 (Q3), and 57 to 70 (Q4).
b
Geometric mean.