Results of a multivariate regression analysis examining factors associated with tumour shrinkage after radiosurgery
| Significance | 95% CI | Odds ratio | |
|---|---|---|---|
| The only significant finding (p = 0.03) was that increasing the marginal dose was more likely to result in tumour shrinkage. The odds of shrinkage appear higher when the patient has not had previous surgery, and when there is growth documented with serial imaging before the radiosurgery, although these factors did not reach statistical significance. Tumour volume did not appear to be related to the likelihood of tumour shrinkage. | |||
| CI, confidence interval. | |||
| Marginal dose (Gy) | 0.03 | 1.02 to 1.68 | 1.31 |
| Previous surgery | 0.13 | 0.84 to 3.92 | 1.82 |
| Documented growth before radiosurgery | 0.14 | 0.84 to 3.20 | 1.64 |
| Tumour volume (cm3) | 0.59 | 0.95 to 1.10 | 1.02 |