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Table 2 The prevalences of different subtypes of asthma according to hereditary groups, the espoo cohort study 1991–2011, Finland

From: Allergic diseases and asthma in the family predict the persistence and onset-age of asthma: a prospective cohort study

  Persistent asthma N (%) Transient asthma N (%) No asthma ever N (%) Total
Early-onset N (%) Late-onset N (%)
Total 134 (8.4) 86 (5.4) 1384 (86.3) 1604 (100.0)
  88 (5.5) 46 (2.9)    
No family history of asthma 73 (6.2) 57 (4.8) 1046 (88.9) 1176 (73.4)
  42 (3.6) 31 (2.6)    
No family history of allergic diseases 33 (5.2) 35 (5.5) 564 (89.2) 632 (39.4)
  18 (2.8) 15 (2.4)    
Any family history of asthma 61 (14.4) 29 (6.8) 335 (78.8) 425 (26.5)
  46 (10.8) 15 (3.5)    
Any family history of allergic diseases 100 (10.5) 50 (5.3) 800 (84.2) 950 (59.3)
  70 (7.4) 30 (3.2)    
Maternal asthma 20 (12.9) 12 (7.7) 123 (79.4) 155 (9.7)
  17 (11.0) 3 (1.9)a    
Maternal allergic diseases 40 (12.4) 22 (6.8) 260 (80.7) 322 (20.1)
  28 (8.7) 12 (3.7)    
Paternal asthma 15 (13.5) 5 (4.5)a 91 (82.0) 111 (6.9)
  9 (8.1) 6 (5.4)    
Paternal allergic diseases 17 (6.2) 15 (5.5) 243 (88.4) 275 (17.1)
  13 (4.7) 4 (1.5)a    
Both parents with asthma 8 (36.4) 2 (9.1)a 12 (54.5) 22 (1.4)
  5 (22.7) 3 (13.6)a    
Both parents with allergic diseases 21 (16.8) 6 (4.8) 98 (78.4) 125 (7.8)
  14 (11.2) 7 (5.6)    
Only siblings with asthma 18 (13.1) 10 (7.3) 109 (79.6) 137 (8.5)
  15 (10.9) 3 (2.2)a    
Only siblings with allergic diseases 22 (9.4) 7 (3.0) 206 (87.7) 235 (14.7)
  15 (6.4) 7 (3.0)    
Only parents with asthma 27 (11.8) 16 (7.0) 185 (81.1) 228 (14.2)
  19 (8.3) 8 (3.5)    
Only parents with allergic diseases 38 (8.6) 29 (6.5) 377 (84.9) 444 (27.7)
  26 (5.9) 12 (2.7)    
Both siblings and parents with asthma 16 (27.1) 3 (5.1)a 40 (67.8) 59 (3.7)
12 (20.3) 4 (6.8)a    
Both siblings and parents with allergic diseases 40 (14.8) 14 (5.2) 217 (80.1) 271 (16.9)
29 (10.7) 11 (4.1)    
  1. % is the percentage of people that represent the corresponding subtype of asthma divided by the total number of people that have the risk factor mentioned in that line (e.g. maternal asthma, paternal allergic diseases, total n in the group mentioned in the last column of the table).
  2. aRestricted amount of observations in the cell may lead to chance variation in the results.
  3. 19 people excluded from the analyses due to either asthma relapse (N = 11) or follow-up time of less than 5 years (N = 8).
  4. Missing information: 1 in parental asthma, 4 for siblings with asthma, 3 in parental allergic diseases, 22 in siblings with allergic diseases.
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