Table 6.
Multivariate analysis of factors affecting ND rates
| Factors | p Value | Odds ratio | 95% CI for odds ratio | |
|---|---|---|---|---|
| Lower | Upper | |||
| Age | .520 | 1.000 | .998 | 1.001 |
| Female | .458 | 1.279 | .667 | 2.451 |
| Male | 1.000 | |||
| CT | .195 | 1.763 | .748 | 4.158 |
| US | 1.000 | |||
| Bone | .004 | 2.553 | 1.345 | 4.848 |
| Soft tissue | 1.000 | |||
| Arm | .599 | 1.361 | .431 | 4.301 |
| Chest | .822 | .779 | .089 | 6.850 |
| Elbow | .027 | 7.977 | 1.273 | 49.979 |
| Foot/ankle | .998 | .252 | .002 | 10.244 |
| Forearm | .035 | 3.661 | 1.093 | 12.263 |
| Hand/wrist | .999 | .424 | .001 | 15.859 |
| Knee | .334 | 2.056 | .477 | 8.854 |
| Leg | .243 | 1.930 | .641 | 5.815 |
| Pelvis | .442 | 1.483 | .543 | 4.050 |
| Shoulder | .589 | .554 | .065 | 4.711 |
| Spine | .537 | 2.044 | .211 | 19.796 |
| *Thigh | 1.000 | |||
| BB | .065 | 2.792 | .938 | 8.313 |
| BST | .530 | .656 | .177 | 2.441 |
| MB | .059 | 2.686 | .962 | 7.501 |
| Met | .286 | 1.996 | .561 | 7.104 |
| MST | .646 | 1.364 | .363 | 5.130 |
| Nonneoplastic* | 1.000 | |||
| Histiocytosis* | .005 | 9.261 | 1.938 | 44.258 |
| Lymphoma* | .046 | 3.051 | 1.022 | 9.113 |
| Osteomyelitis* | .092 | 3.710 | .808 | 17.027 |
* Thigh is the reference category for all other diagnoses; BB = benign bone tumors; BST = benign soft tissue tumors; MB = malignant bone tumors; Met = metastasis; MST = malignant soft tissue tumors.