Table 1. Serum thyrotropin status and body mass index according to characteristics.
| Baseline | Follow-up | |||||
| Characteristics | All participants % (N) | Median (IQR) | Median (IQR) | |||
| Serum TSH (mU/L) | BMI (kg/m2) | Serum TSH (mU/L) | BMI (kg/m2) | |||
| Age (years) | 18–20, women | 19.7% (415) | 1.42 (0.98, 1.98) | 22.1 (20.4, 24.6) | 1.46 (1.11, 2.00) | 23.6 (21.2, 26.9) |
| 25–30, women | 20.8% (436) | 1.36 (0.99, 1.92) | 22.4 (20.6, 24.3) | 1.49 (1.04, 2.09) | 23.5 (21.5, 26.6) | |
| 40–45, women | 26.9% (566) | 1.23 (0.85, 1.78) | 24.1 (21.9, 27.0) | 1.42 (0.93, 2.07) | 25.5 (23.0, 28.9) | |
| 60–65, women | 13.6% (286) | 1.31 (0.84, 1.96) | 26.2 (23.9, 29.0) | 1.40 (0.94, 2.11) | 26.6 (24.1, 29.7) | |
| 60–65, men | 19.0% (399) | 1.24 (0.83, 1.82) | 26.3 (24.6, 28.9) | 1.40 (0.94, 2.02) | 26.6 (24.9, 29.5) | |
| P valuesa | 0.0019 | <0.0001 | 0.39 | <0.0001 | ||
| Leisure time physical activity | Sedentary | 11.4% (237) | 1.22 (0.91, 1.92) | 23.9 (21.5, 28.1) | 1.40 (0.94, 2.09) | 26.7 (22.9, 30.9) |
| Light | 45.9% (956) | 1.28 (0.90, 1.82) | 24.5 (21.9, 27.4) | 1.41 (0.98, 2.00) | 25.5 (22.8, 28.9) | |
| Moderate/vigorous | 42.7% (889) | 1.33 (0.92, 1.92) | 23.9 (21.7, 26.3) | 1.49 (1.02, 2.07) | 24.8 (22.3, 27.3) | |
| P valuea | 0.34 | 0.009 | 0.24 | <0.0001 | ||
| Smoking status | Current smoker | 32.3% (678) | 1.21 (0.84, 1.76) | 23.5 (21.2, 26.3) | 1.22 (0.85, 1.78) | 24.8 (22.1, 28.1) |
| Never smoker | 40.2% (846) | 1.35 (0.96, 1.99) | 24.0 (21.4, 26.8) | 1.56 (1.10, 2.16) | 25.1 (22.4, 28.2) | |
| Former smoker | 19.6% (413) | 1.30 (0.88, 1.97) | 25.5 (23.2, 28.2) | 1.43 (0.98, 2.08) | 25.7 (23.3, 29.0) | |
| Occational smoker | 7.8% (165) | 1.28 (0.82, 1.84) | 23.8 (22.1, 27.0) | 1.43 (1.00, 1.98) | 24.7 (22.3, 28.4) | |
| P valuea | 0.0003 | <0.0001 | <0.0001 | 0.0002 | ||
| Region | Copenhagen | 50.7% (1,065) | 1.34 (0.92, 1.91) | 24.1 (21.7, 27.1) | 1.53 (1.06, 2.17) | 25.0 (22.5, 28.2) |
| Aalborg | 49.3% (1,037) | 1.27 (0.87, 1.82) | 24.1 (21.8, 26.8) | 1.35 (0.90, 1.92) | 25.5 (22.7, 28.6) | |
| P valuea | 0.03 | 0.68 | <0.0001 | 0.11 | ||
| TPO-Ab status (kU/L) | ≥30 | 21.1% (443) | 1.42 (0.96, 2.12) | 23.5 (21.7, 26.7) | 1.78 (1.15, 2.80) | 24.9 (22.8, 28.1) |
| <30 | 78.9% (1,655) | 1.28 (0.89, 1.82) | 24.3 (21.8, 27.1) | 1.39 (0.96, 1.91) | 25.3 (22.6, 28.5) | |
| P valuea | 0.0001 | 0.057 | <0.0001 | 0.52 | ||
a
Kruskal-Wallis test.
TSH serum thyrotropin, BMI body mass index, TPO-Ab thyroid peroxidase antibody, CI confidence interval, IQR interquartile range.