Table 3.
Summarizing table of McNemar test calculation to determine the statistical significant of sensitivity and specificity between axial and multiplanar reconstruction computed tomography images in comparison to magnetic resonance imaging
| Axial- subjects | Axial+ subjects | Total of subjects with MRI+ | |
| Sensitivity1 (P = 0.22) | |||
| MPR- subjects | 5 | 1 | 6 |
| MPR+ subjects | 5 | 40 | 45 |
| Total subjects of MRI+ | 10 | 41 | 51n |
| AXIAL- subjects | AXIAL+ subjects | Total of subjects with MRI- | |
| Specificity2 (P = 0.13) | |||
| MPR- subjects | 29 | 6 | 35 |
| MPR+ subject | 1 | 4 | 5 |
| Total of subjects with MRI- | 30 | 10 | 40n |
McNemar test: 2 × 2 contingency table, which tabulates the outcomes of the two tests (axia CT and MPR images) on a sample of n subjects (respectively 51 who were positive with MRI and 40 who were negative).
1
P = 0.22, two tails, not statistically significant;
2
P = 0.13, two tails, not statistically significant. CT: Computed tomography; MRI: Magnetic resonance imaging.