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Table 1 Commonest causes of chronic cough in patients investigated in specialist clinics

From: Cough variant asthma and atopic coughAsma variante con tosse e tosse atopica

Author Patients' mean age in years (range)    Diagnosis (% of total)
   Asthma syndrome GERD Rhinitis Most common other causes
Irwin et al. 1981 [38] 50.3 (17-88) 25 10 29 Chronic bronchitis (12)
Poe et al. 1982 [39] ? (15-89) 36 0 8 Postinfectious (27)
Poe et al. 1989 [7] 44.8 (19-79) 35 5 26 Idiopathic (12)
Irwin et al. 1990 [4] 51 (6-83) 24 21 41 Chronic bronchitis (5)
Hoffstein 1994 [40] 47 25 24 26 Postinfectious (21)
O'Connell et al. 1994 [41] 49 (19-83) 6 10 13 Idiopathic (22)
Smyrnios et al. 1995 [42] 58 (18-86) 24 15 40 Chronic bronchitis (11)
Mello et al. 1996 [43] 53.1 (15-83) 14 40 38 Bronchiectasis (4)
Marchesani et al. 1998 [44] 51 14 5 56 Chronic bronchitis (16)
McGarvey et al. 1998 [10] 47.5 (18-77) 23 19 21 Idiopathic (18)
Palombini et al. 1999 [13] 57 (15-81) 59 41 58 Bronchiectasis (18)
Brightling et al. 1999 [11] * 31 8 24 Postviral (13)
  1. Definition of abbreviation: GERD, gastroesophageal reflux disease.
  2. *No figures given for the total sample but mean age of 12/91 patients with eosinophilic bronchitis given as 52 (28-76) years.