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Table 4 Known groups’ validity for the UAS7 score: mean scores for different patient-rated categories of overall CSU severity and corresponding between-group effect sizes

From: Psychometric properties of the Spanish version of the once-daily Urticaria Activity Score (UAS) in patients with chronic spontaneous urticaria managed in clinical practice (the EVALUAS study)

  Hives Itch Global Between group effect size
Very mild (n = 20) 2.10 (2.90) 4.26 (4.42) 6.47 (6.69)  
Mild (n = 32) 4.81 (5.45) 7.48 (4.43) 12.40 (8.43) 0.76
Moderate (n = 58) 7.74 (4.37) 9.93 (5.0) 17.62 (8.30) 0.63
Severe/intense (n = 28) 9.61 (5.83) 11.52 (5.88) 21.04 (11.36) 0.36
Very severe /intense (n = 7) 17.71 (3.35) 16.63 (5.32) 33.86 (7.84) 1.19
  1. p < 0.0001 for between group differences