Table 3.
Sensitivity, specificity, and positive and negative predictive values of ACR/EULAR-2019 and SLICC-2012 criteria
| Classification criteria | Sensitivity |
Specificity |
Positive predictive value |
Negative predictive value |
||||
|---|---|---|---|---|---|---|---|---|
| First visit (%) |
Last visit (%) |
First visit (%) |
Last visit (%) |
First visit (%) | Last visit (%) |
First visit (%) |
Last visit (%) |
|
| ACR/EULAR-2019 | 94 | 96 | 77 | 81 | 88 | 93 | 87 | 89 |
| SLICC-2012 | 98 | 98 | 67 | 71 | 84 | 89 | 94 | 94 |
|
P-values |
<0.001 * |
<0.001 * |
<0.001 * |
<0.001 * |
<0.001 ** |
<0.001 ** |
<0.001 ** |
<0.001 ** |
The ACR-1997 criteria were used as reference criteria for calculation of sensitivities, specificities, and positive and negative predictive values. *P-values were calculated using the χ2d test, comparing the sensitivities or specificities obtained by the different classification criteria (ACR/EULAR-2019 vs SLICC-2012) at each time point. **P-values calculated using a binomial exact test, and relating to positive predictive value and negative predictive value for each set of criteria.