Table 3.
RAI treatment: positive versus clear margins.
| All patients n = 963 | Positive margins n = 112 | Clear margins n = 851 | P value∗ | |
|---|---|---|---|---|
| Initial RAI ablation | ||||
| Received RAI | 761 (79%) | 103 (92%) | 658 (77%) | <0.001 |
| RAI dose (GBq) | 3.7 (1.1–7.4) | 3.7 (1.8–5.5) | 3.7 (1.1–7.4) | |
|
| ||||
| T1 patients (n = 603) | ||||
| Received RAI | 421 (70%) | 50 (86%) | 371 (68%) | 0.004 |
| RAI dose (GBq) | 3.7 (1.1–5.7) | 3.7 (1.8–5.5) | 3.7 (1.1–5.7) | |
|
| ||||
| T2 patients (n = 360) | ||||
| Received RAI | 340 (94%)# | 53 (98%)# | 287 (93%)# | 0.180 |
| RAI dose (GBq) | 3.7 (1.1–7.4) | 3.7 (3.7–5.5) | 3.7 (1.1–7.4∗∗) | |
Data are presented as number (percentage) or median (range). ∗Positive versus clear margins. ∗∗Patient was treated with RAI in 1996, unexplained high dose. #P < 0.05 for comparison with fraction of patients receiving RAI in T1 patients.