Table 1.
Urticaria activity score (UAS) and outcome scoring scale (OSS).
| Score | Wheals | Pruritus |
|---|---|---|
| Urticaria activity score (UAS) | ||
| 0 | None | None |
| 1 | Mild (<20 wheals/24 h) | Mild (present but not troublesome) |
| 2 | Moderate (20–50 wheals/24 h) | Moderate (troublesome but does not interfere with sleep) |
| 3 | Severe (>50 wheals/24 h) | Severe (sufficiently troublesome to interfere with normal daily activity and sleep) |
| Outcome scoring scale (OSS) | ||
| 1 | No improvement | |
| 2 | Minimal improvement (symptomatic improvement ±, no change in frequency and extent of the disease) | |
| 3 | Moderate improvement (symptomatic improvement +, less frequent and less extensive disease) | |
| 4 | Marked improvement (occasional episodes, less extensive disease, symptomatic improvement ++, reduced antihistamine use) | |
| 5 | Clearance (with or without antihistamines) | |