Table 2.
The prevalences of different subtypes of asthma according to hereditary groups, the espoo cohort study 1991–2011, Finland
| 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) | ||||
% 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).
aRestricted amount of observations in the cell may lead to chance variation in the results.
19 people excluded from the analyses due to either asthma relapse (N = 11) or follow-up time of less than 5 years (N = 8).
Missing information: 1 in parental asthma, 4 for siblings with asthma, 3 in parental allergic diseases, 22 in siblings with allergic diseases.