Table 2.
Odds ratios for likelihood of treatment interruption
| Characteristic | Odds ratio (95% CI) | P value |
|---|---|---|
| Age | ||
| ≤63 | Reference | |
| >63 | 1.25 (0.53-2.97) | .61 |
| Average shift, first fx | ||
| ≤1.02 mm | Reference | |
| >1.02 mm | 0.95 (0.38-2.36) | .91 |
| Average rotation, first fx | ||
| ≤0.47 degrees | Reference | |
| >0.47 degrees | 4.99 (1.97-12.67) | .0007 |
| KPS | ||
| KPS ≥70 | Reference | |
| KPS <70 | 3.66 (0.70-18.97) | .1227 |
| Sex | ||
| Male | Reference | |
| Female | 0.79 (0.37-1.68) | .5374 |
| Treatment time/fx | ||
| ≤19 min | Reference | |
| >19 min | 4.72 (1.75-12.71) | .0022 |
| Number of fractions | ||
| 1 | Reference | |
| 3 | 1.67 (0.50-5.62) | .66 |
| 5 | 0.69 (0.14-3.49) | .08 |
| Diagnosis | ||
| Metastases | Reference | |
| Meningioma | 0.93 (0.16-5.35) | .93 |
| Schwannoma | 0.07 (0.004-1.34) | .08 |
| Glioma | 3.56 (0.64-19.70) | .15 |
Abbreviations: CI = confidence interval; fx = fractions; KPS = Karnofsky performance status.
Bolding indicates statistical significance.