The cumulative incidences of asthma and respiratory symptoms in a Norwegian general population sample over 11‐yrs follow-up
| Subjects | n | Asthma | Morning cough | Daytime cough | Chronic cough | Phlegm cough | Dyspnoea grade 1 | Dyspnoea grade 2 | Dyspnoea grade 3 | Dyspnoea grade 4 | Attacks of dyspnoea | Wheezing |
| Sex | ||||||||||||
| Males | 1352 | 4.0 | 14.9 | 11.2 | 8.4 | 17.9 | 14.0 | 8.8 | 3.7 | 1.4 | 9.1 | 23.9 |
| Females | 1467 | 3.5 | 17.3 | 11.1 | 9.6 | 15.3 | 20.9 | 14.9 | 5.3 | 2.6 | 11.5 | 27.5 |
| Age in 1985 yrs | ||||||||||||
| 15–29 | 980 | 2.6 | 13.0 | 9.3 | 7.7 | 16.2 | 15.0 | 9.3 | 2.4 | 1.5 | 11.5 | 29.7 |
| 30–49 | 1114 | 3.4 | 16.2 | 11.1 | 9.1 | 14.9 | 13.6 | 8.4 | 3.8 | 1.8 | 8.9 | 26.0 |
| 50–70 | 725 | 5.8 | 20.8 | 13.7 | 10.8 | 19.5 | 27.6 | 21.6 | 8.7 | 3.1 | 11.1 | 20.5 |
| Changes in smoking habits | ||||||||||||
| Never-to-never | 1058 | 3.0 | 13.5 | 9.0 | 7. | 13.3 | 14.8 | 11.3 | 4.1 | 2.1 | 7.6 | 19.9 |
| Non-to-current | 135 | 3.1 | 22.1 | 16.9 | 16.0 | 25.2 | 16.1 | 9.8 | 2.3 | 2.3 | 11.4 | 40.0 |
| Current-to-current | 776 | 4.1 | 25.1 | 17.1 | 13.9 | 24.8 | 21.0 | 11.9 | 4.5 | 1.7 | 14.0 | 37.7 |
| Current-to-ex | 293 | 6.0 | 14.8 | 10.2 | 6.8 | 15.3 | 19.0 | 14.0 | 6.8 | 2.8 | 13.3 | 29.7 |
| Ex-to-ex | 420 | 3.5 | 12.1 | 5.0 | 5.2 | 13.0 | 16.3 | 11.0 | 4.1 | 2.2 | 9.4 | 20.3 |
| Pack-yrs | ||||||||||||
| 0 | 1058 | 3.0 | 13.5 | 9.0 | 7.0 | 13.3 | 14.8 | 11.3 | 4.1 | 2.1 | 7.6 | 19.9 |
| 1–9 | 656 | 3.3 | 12.2 | 7.6 | 6.0 | 13.8 | 15.0 | 8.9 | 2.5 | 1.7 | 11.1 | 28.4 |
| 10–19 | 496 | 2.7 | 21.9 | 13.6 | 11.3 | 21.2 | 21.4 | 11.4 | 3.8 | 2.3 | 13.1 | 31.6 |
| 20+ | 431 | 6.3 | 29.5 | 19.9 | 16.1 | 26.9 | 21.3 | 15.6 | 8.8 | 2.1 | 14.3 | 34.0 |
| Total | 2819 | 3.7 | 16.2 | 11.1 | 9.0 | 16.5 | 17.5 | 11.9 | 4.5 | 2.0 | 10.3 | 25.8 |
Data are presented as % unless otherwise stated