Table 2.
Mast Cell Tumor–Related Mortality by Percentage Class for Histologic Grades According to Patnaik From 95 Cases
| Class | n | Mortality, % | χ2 | P | Fisher P | Odds Ratio | ||
|---|---|---|---|---|---|---|---|---|
| In Class | In Other Classes | Point Estimate | CI | |||||
| Grade 3 | ||||||||
| > 90% | 3 | 100.00 | 10.87 | 19.33 | < .0001 | .0021 | 55.00 | - |
| > 80% | 3 | 100.00 | 10.87 | 19.33 | < .0001 | .0021 | 55.00 | - |
| > 70% | 5 | 100.00 | 8.89 | 32.94 | < .0001 | < .0001 | 106.70 | - |
| > 50% | 9 | 77.78 | 6.98 | 34.21 | < .0001 | < .0001 | 46.67 | 7.9–275.9 |
| Grade 2 | ||||||||
| > 80% | 5 | 60.00 | 11.11 | 9.48 | .0021 | .0174 | 12.00 | 1.8–80.7 |
| > 70% | 18 | 38.89 | 7.79 | 11.81 | .0006 | .0024 | 7.53 | 2.1–26.6 |
| > 50% | 75 | 17.33 | 0.00 | 3.97 | .0462 | .0635 | 8.86 | - |
| Grade 1 | ||||||||
| > 80% | 4 | 0.00 | 14.29 | 0.66 | .4183 | 1.0000 | 0.65 | - |
| > 70% | 5 | 0.00 | 14.44 | 0.83 | .3629 | 1.0000 | 0.52 | - |
| > 50% | 23 | 0.00 | 18.06 | 4.76 | .0291 | .0335 | 0.09 | - |
a
Confidence interval—reported only where odds ratio is estimable.