Timing of lesional increases in size (percentage of total group A or B lesions beginning to increase in size at a given timepoint)
| Time since SRS | Group A (n = 81 lesions)a | Group B (n = 83 lesions)a |
|---|---|---|
| 6 weeks | 30.9% | 0% |
| 3 months | 16.0% | 20.5% |
| 4.5 months | 7.4% | 29% |
| 6 months | 12.3% | 33% |
| 7.5 months | 4.9% | 8.5% |
| 9 months | 6.2% | 2.5% |
| 10.5 months | 3.7% | 1% |
| 12 months | 6.2% | 2.5% |
| 13.5 months | 2.5% | 1% |
| 15 months | 1.2% | 0% |
| 16.5 months | 2.5% | 1% |
| 18 months | 3.7% | 0% |
| 19.5 months | 0% | 0% |
| 21 months | 2.5% | 1% |
| 22.5 months | 0% | 0% |
| 24 months | 0% | 0% |
↵a Group A denotes lesions that increased in size to >120% of the pretreatment volume (ie, each timepoint is compared with the initial treatment volume). Group B denotes lesions whose volumes fluctuated in size during follow-up but never increased to a volume exceeding 120% of the pretreatment volume (ie, each timepoint is compared with both the initial treatment and prior time point volumes).