Table 2. Correlation of post radiosurgery visual outcomes with other variables.
| Post CK SRS visual outcomes (n = 189)** | ||||
|---|---|---|---|---|
| Variable | Improved (n = 152) | Deteriorated (n = 2) | Stable (n = 35) | p-value |
| Age (mean ± SD) | 40.09 ± 12.48 | 47.5 ± 4.95 | 40.26 ± 13.72 | 0.714¥ |
| Gender*** | ||||
| Male | 91 (79.82) | 0 (0) | 23 (20.18) | 0.176ƿ |
| Female | 61 (81.33) | 2 (2.67) | 12 (16) | |
| Tumour size*** | ||||
| Macro | 142 (79.33) | 2 (1.12) | 35 (19.55) | 0.596ƿ |
| Micro | 4 (100) | 0 (0) | 0 (0) | |
| Tumour type | ||||
| Functioning | 51 (78.46) | 0 (0) | 14 (21.54) | 0.453ƿ |
| Non-functioning | 101 (81.45) | 2 (1.61) | 21 (16.94) | |
| Pre CK SRS GTV | 7,360.84 (5,127.63–1,1195.27) | 3,995.65 (3,995.65–3,995.65) | 6,340.28 (4,384.96–1,1142.56) | 0.18£ |
| Radiation Parameters | ||||
| CI (mean ± SD) | 1.33 ± 0.13 | 1.25α. | 1.32 ± 0.1 | 0.762¥ |
| nCI (mean ± SD) | 1.38 ± 0.12 | 1.32α. | 1.36 ± 0.1 | 0.773¥ |
| HI (median with IQR) | 1.25 (1.23–1.27) | 1.2 (1.2–1.2) | 1.25 (1.23–1.28) | 0.322£ |
| C (mean ± SD) | 96.48 ±2.91 | 94.83α | 96.68 ± 2.31 | 0.794¥ |
¥ANOVA; £Kruskall Wallis; ƿChi-Square test, α SD was not calculated due to low sample
**89 patients did not follow-up with perimetry; ***Missing cases did not provide post-treatment perimetry A p-value of <0.05 was considered significant
CK SRS: CyberKnife stereotactic radiosurgery; SD: Standard deviation; GTV: Gross tumour volume; CI: Conformity index; nCI: New conformity index; HI: Homogeneity index; C: Coverage