Table 1 Quantitative myasthenia gravis score items and scoring
Grade (score) | None (0) | Mild (1) | Moderate (2) | Severe (3) |
|---|---|---|---|---|
Test item | ||||
Ptosis (upward gaze), s | 61 | 11–60 | 1–10 | Spontaneous |
Diplopia (lateral gaze), R or L, s | 61 | 11–60 | 1–10 | Spontaneous |
Eyelid closure | Normal | Complete, some resistance | Complete, no resistance | Incomplete |
Dysarthria with counting 1–50 | None | 30–49 | 10–29 | 9 or less |
Swallowing 4 oz. water | Normal | Mild cough, throat clearing | Severe cough/choking | Unable |
Vital capacity, % predicted | ≥ 80 | 65–79 | 50–64 | < 50 |
Right arm held outstretched at 90°, s | 240 | 90–239 | 10–89 | 0–9 |
Left arm held outstretched at 90°, s | 240 | 90–239 | 10–89 | 0–9 |
Right hand grip, kgw, male/female | ≥ 45/ ≥ 30 | 15–44/10–29 | 5–4/5–9 | 0–4/0–4 |
Left hand grip, kgw, male/female | ≥ 35/ ≥ 25 | 15–34/10–24 | 5–4/5–9 | 0–4/0–4 |
Head lift 45° supine, s | 120 | 30–119 | 1–29 | 0 |
Right leg held outstretched at 45° supine, s | 100 | 31–99 | 1–30 | 0 |
Left leg held outstretched at 45° supine, s | 100 | 31–99 | 1–30 | 0 |