Sensitivity, specificity, and mean confidence ratings of participants in defining presence or absence of sacroiliitis on radiographs compared with computed tomography (CT) of the sacroiliac joints. Results are shown as means (standard deviation).
| Radiograph | CT | |
|---|---|---|
| Sensitivity and specificity range from 0 to 100, the range of the ratings is from 1 to 10. | ||
| *p<0.001 with paired t test. The differences in ratings between incorrectly and correctly diagnosed presence or absence of sacroiliitis were all significant (p<0.001). | ||
| The presence or absence of sacroiliitis were all significant (p<0.001). The differences in ratings for radiographs and CTs were not statistically significant. | ||
| Sensitivity | 72.0 (15.1)* | 85.6 (14.1)* |
| Specificity | 84.5 (13.8) | 83.5 (17.0) |
| Mean rating, presence of sacroiliitis correctly diagnosed | 7.7 (1.0) | 7.8 (1.1) |
| Mean rating, presence of sacroiliitis incorrectly diagnosed | 6.6 (1.2) | 6.7 (1.3) |
| Mean rating, absence of sacroiliitis correctly diagnosed | 8.3 (1.0) | 8.0 (1.1) |
| Mean rating, absence of sacroiliitis incorrectly diagnosed | 7.4 (1.4) | 7.0 (1.6) |