Proportions of failed cervical collar clearance by MRI and FE results
| MRI normal | MRI abnormal | ||
| FE normal | 12/34 (35.3%) | 8/21 (38.1%) | |
| FE abnormal | 2/3 (66.7%) | 7/9 (77.8%) | |
| MRI only | MRI+FE | Total | |
| Removed | 17 (41.5%) | 38 (56.7%) | 55 |
| Not removed | 24 (58.5%) | 29 (43.3%) | 53 |
| Total | 41 | 67 | 108 |
Distribution of patients with cervical collar remaining at discharge or greater than 48 hours after MRI and/or FE radiographic imaging. Fractions were expressed as patients with failed cervical collar clearance divided by total subgroup population. An “Abnormal” result was defined as a bony and/or ligamentous injury detected on imaging. P value for χ2 analysis of collar removal was 0.124.
FE, flexion-extension.