Table 2. Age, sex, and age- and sex-adjusted clinical characteristics and thyroid function according to the PHQ9 score.
| PHQ9 score | P for difference | |||
|---|---|---|---|---|
| 0–9 (n = 1655) | 10–14 (n = 83) | 15–27 (n = 25) | ||
| Age (years) | 44.5 ± 0.4 | 40.9 ± 1.8 | 50.1 ± 2.9 | 0.016 |
| Women (%) | 50.9 | 68.7 | 72.0 | 0.001 |
| College graduation (%) | 36.8 ± 1.1 | 28.4 ± 5.1 | 22.3 ± 9.3 | 0.086 |
| Household income (x10,000 KRW) | 386.1 ± 6.8 | 297.6 ± 30.6 | 187.7 ± 55.7 | <0.001 |
| Alcohol intake ≥ 30 g/day (%) | 13.2 ± 0.8 | 21.5 ± 3.6 | 28.0 ± 6.6 | 0.009 |
| Current smoking (%) | 23.6 ± 0.9 | 35.8 ± 4.2 | 28.5 ± 7.7 | 0.017 |
| Diabetes (%) | 9.8 ± 0.7 | 9.6 ± 3.2 | 25.8 ± 5.8 | 0.024 |
| Hypertension (%) | 21.7 ± 0.9 | 22.2 ± 4.2 | 31.7 ± 7.6 | 0.425 |
| Self-reported coronary heart disease history (%) | 1.1 ± 0.3 | 0.4 ± 1.1 | 0.0 ± 2.1 | 0.658 |
| Self-reported cerebrovascular disease history (%) | 0.8 ± 0.2 | 1.5 ± 1.1 | 15.7 ± 2.0 | <0.001 |
| Self-reported cancer history (%) | 3.3 ± 0.4 | 4.1 ± 1.9 | 2.8 ± 3.5 | 0.895 |
| fT4 (ng/dL) | 1.25 ± 0.01 | 1.23 ± 0.02 | 1.22 ± 0.03 | 0.292 |
| TSH (μIU/mL) | 2.71 ± 0.05 | 2.49 ± 0.23 | 2.39 ± 0.42 | 0.519 |
| Subclinical hypothyroidism (%) | 3.3 ± 0.4 | 2.3 ± 2.0 | 7.4 ± 3.6 | 0.468 |
| Subclinical hyperthyroidism (%) | 2.3 ± 0.4 | 5.9 ± 1.8 | 12.1 ± 3.2 | 0.002 |
| Subclinical hyperthyroidism (%)* | 2.3 ± 0.4 | 6.1 ± 1.8 | 12.5 ± 3.3 | 0.001 |
Data are expressed as mean ± SE.
* Adjusted for age, sex, household income, Alcohol intake ≥ 30 g/day, current smoking, diabetes, and cerebrovascular disease history.