Table 3.
Treatment Effect on Overall Survival by Risk Group (n = 2968)
| n (%) | Deceased n (%) | Unadjusted HR (95% CI) | P Value | |
|---|---|---|---|---|
| Tumor size <2 cm and no distant metastases | ||||
| No surgery | 17 (1.4) | 1 (5.9) | 1.00 | |
| Lobectomy | 139 (11.2) | 18 (13.0) | 2.35 (0.31, 17.64) | .4050 |
| Total thyroidectomy | 337 (27.0) | 39 (11.6) | 2.11 (0.29, 15.36) | .4610 |
| Total thyroidectomy + regional lymph nodes resected | 753 (60.4) | 84 (11.2) | 2.00 (0.28, 14.39) | .4900 |
| Tumor size >2.0 cm and no distant metastases | ||||
| No surgery | 36 (2.6) | 22 (61.1) | 1.00 | |
| Lobectomy | 138 (9.9) | 42 (30.4) | 0.29 (0.18, 0.49) | <.0001 |
| Total thyroidectomy | 307 (22.0) | 67 (21.8) | 0.21 (0.13, 0.33) | <.0001 |
| Total thyroidectomy + regional lymph nodes resected | 912 (65.5) | 252 (27.6) | 0.26 (0.17, 0.40) | <.0001 |
| Any tumor size and distant metastases | ||||
| No surgery | 148 (45.0) | 126 (85.1) | 1.00 | |
| Lobectomy | 25 (7.6) | 19 (76.0) | 0.63 (0.39, 1.02) | .0590 |
| Total thyroidectomy | 29 (8.8) | 26 (89.7) | 0.88 (0.58, 1.35) | .5610 |
| Total thyroidectomy + regional lymph nodes resected | 127 (38.6) | 89 (70.1) | 0.50 (0.38, 0.66) | <.0001 |