Test characteristics of FANA as screening test for SLE/MCTD/overlap syndrome (boys)
| FANA endpoint titre | Sensitivity | Specificity | Positive predictive value | Negative predictive value |
|---|---|---|---|---|
| ⩾1:1280 | 0.67 | 0.98 | 0.60 | 0.99 |
| 1:640 | 0.78 | 0.97 | 0.54 | 0.99 |
| 1:320 | 0.78 | 0.91 | 0.25 | 0.99 |
| 1:160 | 1.00 | 0.81 | 0.17 | 1.00 |
| 1:80 | 1.00 | 0.67 | 0.11 | 1.00 |
| 1:40 | 1.00 | 0.53 | 0.08 | 1.00 |
| 1:20 | 1.00 | 0.43 | 0.06 | 1.00 |