| | PMM | Control | P-value | OR | 95% CI |
|---|
| Breed |
| • Dachshund | 19 | 87 | 0.08 | 0.49 | 0.2–1.1 |
| • Cocker Spaniel | 3 | 8 | 0.84 | 0.85 | 0.2–3.9 |
| • Other | 23 | 57 | Ref | | |
| Sex |
| • Female intact | 4 | 13 | 0.38 | 1.9 | 0.5–9.6 |
| • Female spayed | 21 | 66 | 0.40 | 1.5 | 0.6–3.4 |
| • Male intact | 7 | 22 | 0.63 | 1.33 | 0.4–4.1 |
| • Male neutered | 13 | 51 | Ref | | |
| Age |
| • ≤ 6 y | 37 | 119 | 0.8 | 1.13 | 0.4–3.0 |
| • > 6 y | 8 | 33 | Ref | | |
| Site |
| • Intumescence | 15 | 21 | 0.01 | 3.0 | 1.3–7.2 |
| • Thoracolumbar | 30 | 131 | Ref | | |
| Extent of extrusion |
| • Extensive (> 1 disc space) | 20 | 62 | 0.8 | 1.1 | 0.5–2.3 |
| • Focal | 25 | 90 | Ref | | |
| Treatment with NSAIDs |
| • No | 29 | 106 | 0.76 | 0.89 | 0.4–2.0 |
| • Yes | 16 | 46 | Ref | | |
| Treatment with steroid |
| • No | 34 | 86 | 0.01 | 3.1 | 1.3–7.6 |
| • Yes | 11 | 66 | Ref | | |
| Time from onset of clinical signs to loss of ambulation | 0.62 | See Table 3 for details |
| Time from loss of ambulation to surgery | 0.03 |
- PMM progressive myelomalacia, OR: odds ratio, CI confidence interval, Ref reference, NSAID non-steroidal anti-inflammatory drug
