Table 2.

Assessment Scores for AA

Score	Components
SALT score	S0: no hair loss S1: 1% to 24% hair loss S2: 25% to 49% hair loss S3: 50% to 74% hair loss S4: 75% to 99%% hair loss S4A: 75% to 90% hair loss S4B: 91% to 99% hair loss S5: 100% hair loss
ClinRO Measure for Eyebrow Hair Loss (both eyebrows from 2 feet away)	0 The eyebrows have full coverage and no areas of hair loss 1 There are minimal gaps in eyebrow hair and distribution is even 2 There are significant gaps in eyebrow hair or distribution is not even 3 No notable eyebrow hair
ClinRO Measure for Eyelash Hair Loss (upper and lower eyelashes of both eyes)	0 The eyelashes form a continuous line along the eyelids on both eyes 1 There are minimal gaps and the eyelashes are evenly spaced along the eyelids on both eyes 2 There are significant gaps along the eyelids or the eyelashes are not evenly spaced along the eyelids 3 No notable eyelashes
ClinRO Measure for Nail Appearance (based on fingernails + toenails)	0 Nails are not at all damaged (e.g., pitted, rough, brittle, split) 1 At least 1 nail is a little damaged (e.g., pitted, rough, brittle, split) 2 At least 1 nail is moderately damaged (e.g., pitted, rough, brittle, split) 3 At least 1 nail is very damaged (e.g., pitted, rough, brittle, split) or subject has lost at least 1 nail
Alopecia Areata Progression Index	[%AA(L) ×SL(L) ×.18] + [%AA(R) ×SL(R) ×.18] + [%AA(T) ×SL(T) ×.4] + [%AA(B) ×SL(B) ×.24] %AA= % of surface area on the scalp: L = left, R = right, T = Top, B = bottom SL = Score of hair loss over 5 times: 0 = negative pull test, 1 = 10 to 20%, 2 => 20% of grasped hairs