Table 5 Accuracy of CT scan prediction of C-spine injuries requiring treatment
All Patients | ||||
Surgery | 95% CI | Surgery or Collar | 95% CI | |
Sensitivity | 0.804 | (.682, .897) | 0.748 | (.671, .816) |
Specificity | 0.936 | (.927, .943) | 0.952 | (.944, .959) |
PPV | 0.155 | (.115, .202) | 0.383 | (.325, .442) |
NPV | 0.997 | (.995, .998) | 0.99 | (.986, .993) |
Patients with GCS > 13 | ||||
Surgery | 95% CI | Surgery or Collar | 95% CI | |
Sensitivity | 0.796 | (.677, .889) | 0.75 | (.672, .819) |
Specificity | 0.936 | (.927, .944) | 0.953 | (.945, .960) |
PPV | 0.178 | (.133, .229) | 0.409 | (.348, .472) |
NPV | 0.996 | (.994, .998) | 0.989 | (.984, .992) |