Table 1.
Baseline characteristics of the study population.
| Characteristics | Total * (n = 4,658,473) |
Thyroid Cancer Group * (n = 47,325) |
Non-Thyroid Cancer Group * (n = 4,611,148) |
p Value |
|---|---|---|---|---|
| Age, years (mean ± SD) | 51.5 ± 8.1 | 51.1 ± 7.5 | 51.5 ± 8.1 | <0.001 |
| Sex | <0.001 | |||
| Male | 2,468,996 (53.0) | 11,168 (23.6) | 2,457,828 (53.3) | |
| Female | 2,189,477 (47.0) | 36,157 (76.4) | 2,153,320 (46.7) | |
| BMI (mean ± SD) | 24.0 ± 3.0 | 24.2 ± 3.0 | 24.0 ± 3.0 | <0.001 |
| <18 | 44,468 (1.0) | 279 (0.6) | 44,189 (1.0) | 0.063 |
| 18 to <23 | 1,729,714 (37.1) | 17,143 (36.2) | 1,712,571 (37.1) | <0.001 |
| 23 to <25 | 1,299,606 (27.9) | 13,137 (27.8) | 1,286,469 (27.9) | 0.009 |
| 25 to <30 | 1,452,751 (31.2) | 14,943 (31.6) | 1,437,808 (31.2) | <0.001 |
| ≥30 | 131,221 (2.8) | 1811 (3.8) | 129,410 (2.8) | <0.001 |
| Metabolic syndrome | 0.616 | |||
| No | 3,645,691 (78.3) | 37,081 (78.4) | 3,608,610 (78.3) | |
| Yes | 1,012,782 (21.7) | 10,244 (21.6) | 1,002,538 (21.7) | |
| Metabolic syndrome components | ||||
| Abdominal obesity | <0.001 | |||
| No | 3,824,244 (82.1) | 38,235 (80.8) | 3,786,009 (82.1) | |
| Yes | 834,229 (17.9) | 9090 (19.2) | 825,139 (17.9) | |
| Elevated blood pressure | 0.324 | |||
| No | 2,379,655 (51.1) | 24,068 (50.9) | 2,355,587 (51.1) | |
| Yes | 2,278,818 (48.9) | 23,257 (49.1) | 2,255,561 (48.9) | |
| Hyperglycaemia | <0.001 | |||
| No | 3,088,048 (66.3) | 33,476 (70.7) | 3,054,572 (66.2) | |
| Yes | 1,570,425 (33.7) | 13,849 (29.3) | 1,556,576 (33.8) | |
| Hypertriglyceridemia | <0.001 | |||
| No | 3,177,115 (68.2) | 34,921 (73.8) | 3,142,194 (68.1) | |
| Yes | 1,481,358 (31.8) | 12,404 (26.2) | 1,468,954 (31.9) | |
| Low HDL-cholesterol | <0.001 | |||
| No | 3,785,772 (81.3) | 35,098 (74.2) | 3,750,674 (81.3) | |
| Yes | 872,701 (18.7) | 12,227 (25.8) | 860,474 (18.7) |
SD, standard deviation; BMI, body mass index; HDL, high-density lipoprotein. * Expressed as n (%) unless otherwise noted.