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Table 3 Frequency and distribution of attacks per year stratified for male vs female and atopy vs non-atopy

From: Food as a trigger for abdominal angioedema attacks in patients with hereditary angioedema

  Female (n = 27) * p-value Male (n = 15)
No atopy (n = 18) Atopy (n = 9)   No atopy (n = 12) Atopy (n = 3)
No attacks (# subjects) 2 1   5 3
Rare attacks (# subjects) 4 2 0.029 5 -
# attacks (range) 1.5 (1–3) 4 (4–4)   4 (2–6) -
Moderate attacks (# subjects) 8 5 0.854 2 -
# attacks (range) 25.1 (15–37) 26 (12–36)   12 (12–12) -
Frequent attacks (# subjects) 4 1   - -
# attacks (range) 89.5 (53–136) 93   - -
  1. * t-test: The p-values are for the comparison of attack frequency among atopic and non-atopic subjects within one specific category of attacks, where feasible
  2. no attacks: < 1/year; rare attacks: < 1/month; ≥ 1/year; moderate attacks: < 1/week; ≥ 1/month; frequent attacks: ≥1/week