κ-Statistics and Significance of McNemar Differences of SSS for Each Artificial Misregistration
| No. of patients changing category* | |||||
|---|---|---|---|---|---|
| Misregistration direction | Misregistration magnitude (pixels) | Abnormal to normal | Normal to abnormal | κ-value | McNemar test |
| Cephalad (+z-axis) | 3 | 2 | 3 | 0.440 | NS |
| 2 | 4 | 1 | 0.510 | NS | |
| 1 | 4 | 3 | 0.300 | NS | |
| Caudal (–z-axis) | 1 | 3 | 0 | 0.706 | NS |
| 2 | 3 | 3 | 0.394 | NS | |
| 3 | 2 | 7 | 0.043 | P < 0.05 | |
| Dorsal (+y-axis) | 3 | 2 | 8 | −0.075 | P < 0.05 |
| 2 | 1 | 7 | 0.400 | P < 0.05 | |
| 1 | 3 | 4 | 0.286 | NS | |
| Ventral (–y-axis) | 1 | 4 | 1 | 0.510 | NS |
| 2 | 4 | 2 | 0.406 | NS | |
| 3 | 2 | 3 | 0.490 | NS | |
| Left (+x-axis) | 3 | 3 | 4 | 0.286 | NS |
| 2 | 2 | 2 | 0.596 | NS | |
| 1 | 3 | 1 | 0.604 | NS | |
| Right (– x-axis) | 1 | 3 | 2 | 0.500 | NS |
| 2 | 2 | 4 | 0.381 | NS | |
| 3 | 1 | 7 | 0.140 | P < 0.05 | |
↵* Registered case: 9 normal (SSS < 4), 11 abnormal (SSS ≥ 4).
NS = no significant difference (P > 0.05).