Table 1.
Study population characteristics in relation to thyroid stimulating hormone (TSH) categories
| Serum TSH | Total | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| <0.50 | 0.50–1.49 | 1.5–2.49 | 2.5–3.49 | ≥3.5 | ||||||||
| Participants (%) | 908 | (2.4) | 17675 | (46.7) | 13228 | (34.9) | 3773 | (10.0) | 2307 | (6.1) | 37891 | |
| Women (%) | 651 | (2.9) | 10405 | (45.8) | 7738 | (34.1) | 2346 | (10.3) | 1574 | (6.9) | 22714 | (60.0) |
| Men (%) | 257 | (1.7) | 7270 | (47.9) | 5490 | (36.2) | 1427 | (9.4) | 733 | (4.8) | 15177 | (40.0) |
| Age (SD) | 50.7 | (16.7) | 48.2 | (15.3) | 51.6 | (15.6) | 54.9 | (15.9) | 58.3 | (15.3) | 50.7 | (15.8) |
| BMI (SD) | 25.9 | (4.4) | 26.1 | (4.1) | 26.8 | (4.2) | 27.1 | (4.4) | 27.2 | (4.5) | 26.5 | (4.2) |
| Smoking status (%) | ||||||||||||
| Never | 335 | (36.9) | 6778 | (38.3) | 6080 | (46.0) | 1869 | (49.5) | 1167 | (50.6) | 16229 | (42.8) |
| Former | 236 | (26.0) | 4683 | (26.5) | 3768 | (28.5) | 1120 | (29.7) | 723 | (31.3) | 10530 | (27.8) |
| Current | 337 | (37.1) | 6214 | (35.2) | 3380 | (25.5) | 784 | (20.8) | 417 | (18.1) | 11132 | (29.4) |
| Physical activity (%) (missing = 6826) | ||||||||||||
| Low | 46 | (6.5) | 862 | (6.0) | 719 | (6.6) | 232 | (7.4) | 151 | (8.2) | 2010 | (6.5) |
| Medium | 371 | (52.8) | 7226 | (49.9) | 5454 | (50.0) | 1555 | (49.7) | 921 | (50.1) | 15527 | (50.0) |
| High | 286 | (40.7) | 6394 | (44.1) | 4738 | (43.4) | 1344 | (42.9) | 766 | (41.7) | 13528 | (43.6) |
| Diabetes (%) (missing = 56) | 55 | (6.1) | 613 | (3.5) | 559 | (4.2) | 173 | (4.6) | 115 | (5.0) | 1515 | 4.0 |