Table 1 Description of the mSASSS and RASSS scoring systems.
mSASSS | RASSS | |
|---|---|---|
Spinal segments assessed | ||
- Cervical spine | Lower border of C2 to upper border of T1 | Lower border of C2 to upper border of T1 |
- Thoracic spine | Not included | Lower border of T10 to upper border of T12 |
- Lumbar spine | Lower border of T12 to upper border of S1 | Lower border of T12 to upper border of S1 |
Range of scoring system | 0-72 | 0-84 |
Scoring definitions | ||
- 0 | No change | No change |
- 1 | Erosion, squaring, sclerosis | Squaring only for the thoracic and lumbar segments; no erosions scored; sclerosis scores for all VCs |
- 2 | Syndesmophytes | Syndesmophytes |
- 3 | Bridging syndesmophytes/ankylosis | Bridging syndesmophytes/ankylosis |