Table 2.

Disease activity and damage: IMACS core set measurements

Disease activity

Physician global activity—VAS/Likert

Patient/parent global activity—VAS/Likert

Muscle strength—manual muscle test (MMT)

Physical function—[C]HAQ, CMAS

Laboratory—muscle enzymes

Extra-muscular activity—MDAAT

Damage

Myositis Damage Index (MDI)

Physician global damage—VAS/Likert

Physical function—[C]HAQ

C childhood, CMAS Childhood Myositis Assessment Scale, VAS visual analog scale, HAQ health assessment questionnaire, MDAAT myositis disease activity assessment tool, IMACS International Myositis Assessment and Clinical Studies Group