Table 6.
Outcome after Negative CT
| ALL PATIENTS | Number | Percentage | Number | Percentage | Number | Percentage | Number | Percentage | ||
|---|---|---|---|---|---|---|---|---|---|---|
|
| ||||||||||
| All GCS | (n=83) | GCS <9 | (n=17) | GCS 9-13 | (n=12) | GCS 14-15 | (n=54) | |||
| Negative MRI | 74 | 89% | 14 | 82% | 11 | 92% | 49 | 91% | p=0.597 | |
| Clinically Stable Injury | 9 | 11% | 3 | 18% | 1 | 8% | 5 | 9% | ||
| Clinically Unstable Injury (Halo or Surgery) | 0 | 0% | 0 | 0% | 0 | 0% | 0 | 0% | ||
| Airway for MRI | 42 | 51% | 16 | 94% | 8 | 67% | 18 | 33% | p<0.001* | |
| New Airway for MRI | 15 | 35% | 2 | 13% | 2 | 25% | 11 | 61% | p<0.001* | |
| VAP/Aspiration | 0 | 0% | 0 | 0% | 0 | 0% | 0 | 0% | - | |
| Concurrent MRI | 56 | 67% | 15 | 88% | 7 | 58% | 34 | 63% | p=0.117 | |
|
| ||||||||||
| NON-AHT | All GCS | (n=71) | GCS <9 | (n=13) | GCS 9-13 | (n=11) | GCS 14-15 | (n=47) | ||
|
| ||||||||||
| Negative MRI | 62 | 87% | 10 | 77% | 10 | 91% | 42 | 89% | p=0.455 | |
| Clinically Stable Injury | 9 | 13% | 3 | 23% | 1 | 9% | 5 | 11% | ||
| Airway for MRI | 30 | 42% | 12 | 92% | 7 | 64% | 11 | 23% | p<0.001* | |
| New Airway for MRI | 10 | 14% | 1 | 8% | 2 | 18% | 7 | 15% | p=0.018* | |
| Concurrent MRI | 44 | 62% | 11 | 85% | 6 | 55% | 27 | 57% | p=0.174 | |
|
| ||||||||||
| AHT | All GCS | (n=12) | GCS <9 | (n=4) | GCS 9-13 | (n=1) | GCS 14-15 | (n=7) | ||
|
| ||||||||||
| Negative MRI | 12 | 100% | 4 | 100% | 1 | 100% | 7 | 100% | - | |
| Clinically Stable Injury | 0 | 0% | 0 | 0% | 0 | 0% | 0 | 0% | - | |
| Airway for MRI | 12 | 100% | 4 | 100% | 1 | 100% | 7 | 100% | - | |
| New Airway for MRI | 5 | 42% | 1 | 25% | 0 | 0% | 4 | 57% | p=0.394 | |
| Concurrent MRI | 12 | 100% | 4 | 100% | 1 | 100% | 7 | 100% | - | |
A subset analysis of the 83 patients who had a negative CT and subsequent positive or negative MRI, stratified by GCS group and AHT status. Statistical comparisons are made between GCS groups for each variable both independent of AHT status and within each AHT status subgroup. “Airway for MRI”: an airway was in place for any reason. “New airway for MRI”: an airway was placed for obtaining MRI. “Concurrent MRI”: another region (e.g., brain, thoracic or lumbar spine) was imaged during the same acquisition as the cervical spine.