Table 4

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 IAge 25–34 years at ECRHS IAge 35–44 years at ECRHS Ip value for difference between age groups
Prevalence (%) in ECRHS I in responders to ECRHS IIChange (95% CI)in prevalence (%)p value for changePrevalence (%) in ECRHS I in responders to ECRHS IIChange (95% CI)in prevalence (%)p value for changePrevalence (%) in ECRHS I in responders to ECRHS IIChange (95% CI)in prevalence (%)p value for change
95% CI =  95% confidence interval.
*A positive response to either of the questions.
Q121.50.6 (−1.8 to 3.1)0.61020.2−1.3 (−2.9 to 0.3)0.11319.9−1.1 (−2.4 to 0.3)0.1190.310
Q1.110.40.2 (−1.6 to 2.0)0.8209.40.1 (−1.0 to 1.2)0.87610.10.3 (−0.6 to 1.3)0.5020.989
Q1.212.70.5 (−1.5 to 2.6)0.61612.4−0.2 (−2.0 to 1.5)0.78311.90.3 (−1.0 to 1.6)0.6970.783
Q211.03.1 (0.7 to 5.5)0.01212.60.0 (−1.7 to 1.7)0.99313.7−0.7 (−2.3 to 0.9)0.4020.025
Q35.01.2 (−0.2 to 2.6)0.0845.30.0 (−0.9 to 1.0)0.9356.5−0.1 (−1.0 to 0.8)0.8030.458
Q427.31.8 (−1.7 to 5.4)0.21327.4−1.6 (−3.8 to 0.6)0.15528.3−1.8 (−4.1 to 0.5)0.1300.076
Q53.31.3 (0.1 to 2.6)0.0303.50.7 (0.0 to 1.4)0.0593.30.6 (−0.2 to 1.4)0.1270.663
Q63.22.4 (1.2 to 3.6)<0.0013.91.8 (1.1 to 2.5)<0.0013.72.1 (1.2 to 3.0)<0.0010.485
Q5 or Q6*4.42.9 (1.6 to 4.2)<0.0015.22.1 (1.3 to 2.9)<0.0014.91.9 (1.0 to 2.9)<0.0010.657
Q726.26.9 (4.7 to 9.2)<0.00125.63.5 (2.0 to 5.0)<0.00124.12.3 (1.0 to 3.5)<0.0010.005