Net change in asthma symptoms and medication per 10 years of follow up by age group, estimated by generalised estimating equations
| Question (see Appendix 1) | Age 20–24 years at ECRHS I | Age 25–34 years at ECRHS I | Age 35–44 years at ECRHS I | p value for difference between age groups | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Prevalence (%) in ECRHS I in responders to ECRHS II | Change (95% CI)in prevalence (%) | p value for change | Prevalence (%) in ECRHS I in responders to ECRHS II | Change (95% CI)in prevalence (%) | p value for change | Prevalence (%) in ECRHS I in responders to ECRHS II | Change (95% CI)in prevalence (%) | p value for change | ||
| 95% CI = 95% confidence interval. | ||||||||||
| *A positive response to either of the questions. | ||||||||||
| Q1 | 21.5 | 0.6 (−1.8 to 3.1) | 0.610 | 20.2 | −1.3 (−2.9 to 0.3) | 0.113 | 19.9 | −1.1 (−2.4 to 0.3) | 0.119 | 0.310 |
| Q1.1 | 10.4 | 0.2 (−1.6 to 2.0) | 0.820 | 9.4 | 0.1 (−1.0 to 1.2) | 0.876 | 10.1 | 0.3 (−0.6 to 1.3) | 0.502 | 0.989 |
| Q1.2 | 12.7 | 0.5 (−1.5 to 2.6) | 0.616 | 12.4 | −0.2 (−2.0 to 1.5) | 0.783 | 11.9 | 0.3 (−1.0 to 1.6) | 0.697 | 0.783 |
| Q2 | 11.0 | 3.1 (0.7 to 5.5) | 0.012 | 12.6 | 0.0 (−1.7 to 1.7) | 0.993 | 13.7 | −0.7 (−2.3 to 0.9) | 0.402 | 0.025 |
| Q3 | 5.0 | 1.2 (−0.2 to 2.6) | 0.084 | 5.3 | 0.0 (−0.9 to 1.0) | 0.935 | 6.5 | −0.1 (−1.0 to 0.8) | 0.803 | 0.458 |
| Q4 | 27.3 | 1.8 (−1.7 to 5.4) | 0.213 | 27.4 | −1.6 (−3.8 to 0.6) | 0.155 | 28.3 | −1.8 (−4.1 to 0.5) | 0.130 | 0.076 |
| Q5 | 3.3 | 1.3 (0.1 to 2.6) | 0.030 | 3.5 | 0.7 (0.0 to 1.4) | 0.059 | 3.3 | 0.6 (−0.2 to 1.4) | 0.127 | 0.663 |
| Q6 | 3.2 | 2.4 (1.2 to 3.6) | <0.001 | 3.9 | 1.8 (1.1 to 2.5) | <0.001 | 3.7 | 2.1 (1.2 to 3.0) | <0.001 | 0.485 |
| Q5 or Q6* | 4.4 | 2.9 (1.6 to 4.2) | <0.001 | 5.2 | 2.1 (1.3 to 2.9) | <0.001 | 4.9 | 1.9 (1.0 to 2.9) | <0.001 | 0.657 |
| Q7 | 26.2 | 6.9 (4.7 to 9.2) | <0.001 | 25.6 | 3.5 (2.0 to 5.0) | <0.001 | 24.1 | 2.3 (1.0 to 3.5) | <0.001 | 0.005 |