Table I.
Comparison of the general information of subjects in the three groups.
| Features | MTC group (n=39) | PTC group (n=50) | Benign control group | χ2 | P-value |
|---|---|---|---|---|---|
| Sex | |||||
| Male | 21 | 24 | 14 | 0.436 | 0.804 |
| Female | 18 | 26 | 16 | ||
| Age (years) | |||||
| ≤40 | 15 | 20 | 9 | 0.860 | 0.651 |
| >40 | 24 | 30 | 21 | ||
| Marriage status | |||||
| Unmarried | 7 | 11 | 4 | 0.946 | 0.623 |
| Married | 32 | 39 | 26 | ||
| Education | |||||
| High school degree and below | 23 | 32 | 17 | 0.479 | 0.787 |
| College degree and above | 16 | 18 | 13 | ||
| Income (Yuan) | |||||
| ≤3000 | 24 | 32 | 16 | 0.919 | 0.632 |
| >3000 | 15 | 18 | 14 | ||
| Place of residence | |||||
| Coastal region | 12 | 13 | 8 | 0.271 | 0.873 |
| Inland | 27 | 37 | 22 | ||
| Occupation | |||||
| Farmer | 11 | 13 | 8 | 0.288 | 0.991 |
| Worker | 19 | 27 | 16 | ||
| Cadres | 9 | 10 | 6 | ||
MTC, medullary thyroid carcinoma; PTC, papillary thyroid carcinoma. Data are expressed as number of patients.