Scoring Atopic Dermatitis (European Task Force 1993).

What it is and when to use it

The SCORAD (SCORing Atopic Dermatitis) is a composite index that quantifies atopic dermatitis severity by combining three components: disease extent (rule of nines applied to body surface area), intensity of six clinical signs (erythema, oedema/papulation, oozing/crusting, excoriation, lichenification and dryness), and subjective symptoms (pruritus and sleep loss) rated by the patient on visual analogue scales. It was developed by the European Task Force on Atopic Dermatitis (ETFAD/EADV) and is one of the reference tools recommended by European guidelines (EuroGuiDerm/EADV) to assess severity and monitor treatment response.

How to interpret it

The total SCORAD ranges from 0 to 103. It is calculated as A/5 + 7B/2 + C, where A is extent (0-100), B is intensity (0-18) and C is subjective symptoms (0-20). It is generally interpreted as follows: below 25 indicates mild disease, 25 to 50 moderate disease, and above 50 severe disease. An objective variant (oSCORAD) omits the subjective component C and has a maximum of 83, useful when patient-reported scores are unavailable. Relative reduction from baseline (SCORAD-50, SCORAD-75) is used as a measure of therapeutic response.

Limitations and when not to use it

The SCORAD is validated for atopic dermatitis in children and adults; it does not apply to other eczematous dermatoses. It is a single-timepoint, observer-dependent tool with non-negligible inter-observer variability, particularly in estimating extent and lichenification; it also has limitations in dark skin, where erythema may be underestimated. It does not assess quality-of-life impact (instruments such as the DLQI or POEM are needed for that) nor the chronic course of disease, and the subjective component requires patient cooperation, making it unreliable in very young infants.

Frequently asked questions

What is the difference between SCORAD and oSCORAD?

The SCORAD includes patient-reported subjective symptoms (pruritus and sleep loss), whereas the oSCORAD (objective) omits them. Total SCORAD reaches 103 and oSCORAD reaches 83.

What SCORAD value is considered severe atopic dermatitis?

A score above 50 is considered severe disease; 25 to 50 is moderate, and below 25 is mild.

How is treatment response measured with SCORAD?

It is expressed as percentage reduction from baseline, such as SCORAD-50 (50% improvement) or SCORAD-75, which are common endpoints in clinical trials and follow-up practice.