| Definite SLE (ACR 97) | Probable SLE (ACR97) SLICC criteria + | P value | |
|---|---|---|---|
| N=167 | N=25 | (Wilcoxon or Fisher) | |
| Age | 46.64±13.61 | 46.2±17.02 | =0.74435 |
| Age at onset | 31.03±13.18 | 42±17.53 | =0.00272 |
| SLE duration (years) | 16.6±8.4 | 5.2±6.3 | <0.0001 |
| SKI | 3.66±2.44 | 0.8±0.65 | <0.01 |
| SDI | 1.95±2.38 | 0.4±0.65 | =0.00015 |
| Nephritis | 53 (32.1%) | 0 (0%) | =0.00036 |
| Major organ | 91 (54.5%) | 1 (4.2%) | <0.01 |
| Corticoids (cumulative) | 129 (77.7%) | 11 (44%) | 0.00105 |
| Antimalarials (cumulative) | 138 (82.6%) | 13 (52%) | 0.0013 |
| Corticoids ≥60mg | 71 (42.8%) | 3 (12%) | 0.00351 |
SKI, severity Katz index; SDI, SLICC/ACR damage index; AFS, antiphospholipid syndrome; Antimal, antimalarials; CE, corticosteroids.