Table II. Receiver-Operator Characteristics (ROC) analysis: Accuracy of SNAP components.
Accuracy of SNAP components. ROC analysis of each of the SNAP tests shows that the overall sum (SNAP score) has higher accuracy compared to its individual components. AUC represents overall accuracy with a perfect diagnostic test having an AUC of 1.0, and a test performing no better than chance having an AUC of 0.5. The p-value represents statistical significance compared with the null hypothesis, AUC = 0.5. (sham, n = 37; injured, n = 88).
| Accuracy of SNAP components | |||
|---|---|---|---|
| Component | AUC | 95% Confidence Interval | p value |
| Interactions | 0.610 | [0.498, 0.722] | 0.0526 |
| Cage grasp | 0.658 | [0.557, 0.759 | 0.0055 |
| Visual placing | 0.812 | [0.737, 0.887] | < 0.0001 |
| Pacing or circling | 0.502 | [0.391, 0.614] | 0.9698 |
| Gait and posture | 0.790 | [0.710, 0.870] | < 0.0001 |
| Head tilt | 0.722 | [0.631, 0.813] | < 0.0001 |
| Visual field | 0.8146 | [0.738, 0.894] | < 0.0001 |
| Baton | 0.891 | [0.823, 0.958] | < 0.0001 |
| SNAP Score | 0.971 | [0.946, 0.996] | < 0.0001 |