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General characterization of case and control group.
| Characteristics | Controls, n (%) n=697 | Thyroid carcinoma, n (%) n=183 | P-valuea |
|---|---|---|---|
| Sex | P<0.001 | ||
| Female | 249 (35.7) | 132 (72.1) | |
| Male | 448 (64.2) | 51 (27.8) | |
| Age, years | P<0.001 | ||
| ≤40 | 110 (15.8) | 87 (47.5) | |
| 41–50 | 223 (32.0) | 49 (26.8) | |
| 51–60 | 142 (20.4) | 31 (16.9) | |
| 61–70 | 106 (15.2) | 15 (8.2) | |
| >70 | 116 (16.6) | 1 (0.6) |
Analyzed using a χ2 test.
