Table 2.
Univariate analysis of BM-related variables for TC patients in training set
| Variables | Without BM(N = 10,268) | With BM(N = 72) | P value |
|---|---|---|---|
| Age (years) | <0.001 | ||
| <50 | 5430 (52.9%) | 10 (13.9%) | |
| ≥ 50 | 4838 (47.1%) | 62 (86.1%) | |
| Race | <0.001 | ||
| Black | 751 (7.3%) | 16 (22.2%) | |
| Other a | 1262 (12.3%) | 7 (9.7%) | |
| White | 8255 (80.4%) | 49 (68.1%) | |
| Sex | <0.001 | ||
| Female | 7802 (76.0%) | 39 (54.2%) | |
| Male | 2466 (24.0%) | 33 (45.8%) | |
| Histology | <0.001 | ||
| ATC | 203 (2.0%) | 24 (33.3%) | |
| FTC | 642 (6.3%) | 16 (22.2%) | |
| MTC | 82 (0.8%) | 2 (2.8%) | |
| PTC | 9341 (91.0%) | 30 (41.7%) | |
| Grade | <0.001 | ||
| Grade I | 8247 (80.3%) | 19 (26.3%) | |
| Grade II | 1462 (14.2%) | 12 (16.7%) | |
| Grade III | 272 (2.6%) | 10 (13.9%) | |
| Grade IV | 287 (2.8%) | 31 (43.1%) | |
| Laterality | 0.083 | ||
| Unilateral | 10,201 (99.3%) | 70 (97.2%) | |
| Bilateral | 67 (0.7%) | 2 (2.8%) | |
| T stage | <0.001 | ||
| T1 | 5740 (55.9%) | 4 (5.5%) | |
| T2 | 1789 (17.4%) | 8 (11.1%) | |
| T3 | 2165 (21.1%) | 21 (29.2%) | |
| T4 | 574 (5.6%) | 39 (54.2%) | |
| N stage | <0.001 | ||
| N0 | 7650 (74.5%) | 35 (48.6%) | |
| N1 | 2618 (25.5%) | 37 (51.4%) | |
| Tumor size | <0.001 | ||
| <2 cm | 6216 (60.5%) | 8 (11.1%) | |
| 2–4 cm | 1244 (12.1%) | 45 (62.5%) | |
| >4 cm | 2808 (27.3%) | 19 (26.4%) | |
| Insurance status | 0.853 | ||
| Insured | 10,019 (97.6%) | 71 (98.6%) | |
| Uninsured | 249 (2.4%) | 1 (1.4%) | |
| Marital status | 0.289 | ||
| Married | 6606 (64.3%) | 42 (58.3%) | |
| Unmarried | 3662 (35.7%) | 30 (41.7%) | |
Data notes: a Includes: American Indian, native Alaskan and Asian, Pacific Islander; PTC papillary thyroid carcinoma, FTC Follicular thyroid carcinoma, ATC Anaplastic thyroid carcinoma, MTC Medullary thyroid carcinoma