Parameters:
(1) double vision on lateral gaze
(2) ptosis on upward gaze
(3) weakness of facial muscles
(4) swallowing water
(5) speech after counting aloud
(6) ability to keep right arm outstretched
(7) ability to keep left arm outstretched
(8) vital capacity as percent of predicted
(9) right hand grip strength
(10) left hand grip strength
(11) ability to keep head lifted when lying supine
(12) ability to keep the right leg outstretched
(13) ability to keep the left leg outstretched
Each item is scored from 0 (normal) to 3 (significant).
total score =
= SUM(points for all 13 applicable parameters)
Interpretation:
• minimum score: 0
• maximum score: 39
• The higher the score, the greater the disease severity.
