Table 2. Univariate and Multivariate Logistic Regression Analysis to Determine Parameters Associated With the Ability to Predict PDGFRA Mutations.
| Characteristic | Univariate | Multivariate | ||
|---|---|---|---|---|
| OR (95% CI) | P value | OR (95% CI) | P value | |
| SUVmax >5.75 | 0.04 (0.02-0.11) | <.001 | 0.03 (0.01-0.10) | <.001 |
| Sex (male) | 0.91 (0.47-1.78) | .79 | NA | NA |
| Stage of disease (advanced) | 0.62 (0.29-1.34) | .23 | NA | NA |
| Primary site of tumor | ||||
| Ileum vs stomach | 0.09 (0.025-0.32) | <.001 | 0.11 (<0.02-0.57) | .008 |
| Other site vs stomach | 0.08 (0.02-0.37) | .001 | 0.08 (0.01-0.55) | .01 |
| Tumor dimension, cm | ||||
| 5-10 vs <5 | 1.92 (0.69-5.31) | .21 | 3.80 (0.91-15.75) | .06 |
| >10 vs <5 | 3.30 (1.22-8.93) | .02 | 7.91 (1.90-32.84) | .004 |
| Mitotic index, HPF | ||||
| ≤5/50 vs >5/50 | 0.50 (0.22-1.12) | .09 | NA | NA |
Abbreviations: HPF, high-power field; NA, not applicable; OR, odds ratio; PDGFRA, platelet-derived growth factor receptor α; SUVmax, maximum standardized uptake value.