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Table 3 Asthma comorbities for ‘Current asthma’ subjects (n = 450) and for the total sample (n = 6003)

From: Prevalence of asthma in Portugal - The Portuguese National Asthma Survey

  Current asthma subjects, % (95%CI) Total sample, % (95%CI)
Upper airways disease   
  None (Rhinitis-/Sinusitis-) 46.9 (40.5-53.4)* 77.2 (75.7-78.7)
  Rhinitis 52.3 (45.8-58.6)* 22.1 (20.7-23.6)
  Mild 14.0 (10.4-18.8)* 8.3 ( 7.4- 9.3)
  Intermittent 12.1 ( 8.6-16.7) 7.4 ( 6.6- 8.4)
  Persistent 1.9 ( 1.0- 3.8) 0.9 ( 0.6- 1.2)
  Moderate/Severe 38.2 (32.3-44.5)* 13.8 (12.6-15.1)
  Intermittent 29.9 (24.4-36.0) 11.1 (10.1-12.3)
  Persistent 8.3 ( 5.7-12.0) 2.7 ( 2.2- 3.3)
  Rhinitis+ /Sinusitis- 46.7 (40.4-53.2)* 21.2 (19.8-22.6)
  Sinusitis 6.4 ( 4.3- 9.4)* 1.6 ( 1.2- 2.1)
  Rhinitis - /Sinusitis+ 0.9 ( 0.3- 2.2) 0.7 ( 0.4- 1.0)
  Both (Rhinitis+/Sinusitis+) 5.5 ( 3.5- 8.5)* 1.0 ( 0.7- 1.3)
Chronic bronchitis 5.7 ( 3.8- 8.5)* 2.7 ( 2.2- 3.2)
Non-respiratory allergic disease 55.4 (48.9-61.7)* 33.0 (31.4-34.7)
  Eczema/atopic dermatitis 44.3 (38.1-50.8)* 26.1 (24.6-27.7)
  Drug allergy 13.3 ( 9.8-17.9)* 7.5 ( 6.7- 8.5)
  Food allergy 12.2 ( 8.3-17.6)* 5.3 ( 4.5- 6.1)
  1. (−) indicates absence; (+) indicates presence; *p < 0.001.