Severity index scoring system of organ function in patients with systemic sclerosis (SSc). The definition of the categories used is given below. For each organ system grades of 0 (no involvement)—4 (end stage failure). Scoring system used to assess survival function
| Organ system score | Severity index score in patients with systemic sclerosis | ||||
|---|---|---|---|---|---|
| No involvement = 0 | Mild involvement = 1 | Moderate involvement = 2 | Severe involvement = 3 | End stage failure = 4 | |
| General | |||||
| Haemoglobin (g/l) | >120 | 110–120 | 95–110 | 75–95 | <75 |
| Skin score 0–72 | 0 | 1–19 | 20–39 | 40–59 | >60 |
| Gastrointestinal function | |||||
| Oesophageal cinematography and | 0 | 1–2 | 3 | 3 | 3 |
| Triolein test (% of a given dose/h) | >1.5 | 1.0–1.5 | <1.0 | ||
| Lung function | |||||
| Vital capacity (% of normal) or | >80 | 70–80 | 50–69 | 40–49 | <40 |
| compliance (% of normal) | >60 | 40–60 | 20–39 | 10–19 | <10 |
| Renal function | |||||
| Cr-EDTA clearance (ml/min) | 80–120 | 50–79 | 25–49 | 10–24 | <10 |