Estimated prevalence of lung conditions by childhood bronchitis severity, adjusted for confounding variables
| Clinical characteristic at age 53 years | TAHS participants attending follow-up at age 53 (% (95% CI))* | ||||
| None (52.5%) | Prevalence of childhood bronchitis by age 7 years | P trend | |||
| Non-recurrent (28.1%) | Recurrent, non-protracted (18.1%) | Recurrent-protracted (1.3%)† | |||
| Chronic bronchitis-current | 5.4 (4.2 to 6.5) | 4.6 (3.2 to 5.9) | 5.1 (3.3 to 6.8) | 9.9 (1.5 to 18.2) | 0.070 |
| Chronic bronchitis-ever | 8.9 (7.4 to 10.3) | 8.2 (6.3 to 10.0) | 9.5 (7.2 to 11.9) | 14.8 (4.5 to 25) | 0.245 |
| Doctor-diagnosed current asthma | 8.6 (7.2 to 10.0) | 11.5 (9.4 to 13.6) | 16.2 (13.1 to 19.2) | 29.4 (15.7 to 43.1) | <0.001 |
| Doctor-diagnosed asthma-ever | 27.0 (24.9 to 29.0) | 32.9 (30.0 to 35.8) | 50.1 (46.4 to 53.9) | 70.1 (57.1 to 83.0) | <0.001 |
| Dr-diagnosed pneumonia-ever | 14.4 (12.6 to 16.0) | 19.2 (16.7 to 21.8) | 25.1 (21.5 to 28.7) | 35.0 (20.6 to 49.4) | <0.001 |
*Absolute numbers derived from multivariable regression analyses using the ‘margin’ command.
†Prevalence estimates are based on n=42.
TASH, Tasmanian Longitudinal Health Study.