Proposed disease activity indices for systemic sclerosis (SSc)
| Criteria | Whole series | dSSc | lSSc |
| TTS5-150>20 | 1.0 | ||
| Scleredema | 0.5 | 0.5 | |
| Δ-Skin | 2.0 | 3.0 | 2.5 |
| Digital necrosis | 0.5 | ||
| Δ-Vasc | 0.5 | 2.0 | 1.0 |
| Arthritis | 0.5 | 1.0 | |
| Δ-JM5-150 | 1.0 | ||
| ↓ Tlco 5-150 | 0.5 | ||
| Δ-HL5-150 | 2.0 | 4.0 | 1.5 |
| ESR5-150 >30 mm/1st h | 1.5 | 2.5 | |
| Hypocomplementaemia | 1.0 | 1.0 | |
| Total maximum disease activity index | 10.0 | 10.0 | 10.0 |
↵5-150 TSS = total skin score;Δ-JM = articular/muscular; Tlco = carbon monoxide transfer factor <80% of the predicted value;Δ-HL = cardiopulmonary; ESR = erythrocyte sedimentation rate.