TABLE 2

Association between treatment for asthma and annual absenteeism by sex, age and area deprivation

Univariate IRR (95% CI)Multivariate# IRR (95% CI)Multivariate IRR (95% CI)
Overall1.30 (1.28–1.31)1.25 (1.24–1.26)1.25 (1.24–1.26)
Sex
 Boys1.28 (1.27–1.30)1.24 (1.23–1.26)1.25 (1.23–1.26)
 Girls1.32 (1.30–1.35)1.26 (1.24–1.28)1.26 (1.24–1.28)
Age
 <11 years1.38 (1.36–1.40)1.32 (1.31–1.34)1.32 (1.30–1.33)
 11–14 years1.29 (1.26–1.31)1.24 (1.22–1.26)1.26 (1.24–1.28)
 >14 years1.17 (1.15–1.19)1.14 (1.12–1.16)1.15 (1.13–1.17)
Area deprivation
 1 (most deprived)1.19 (1.17–1.21)1.19 (1.17–1.21)1.21 (1.19–1.23)
 21.25 (1.23–1.28)1.26 (1.23–1.28)1.26 (1.23–1.28)
 31.26 (1.24–1.29)1.26 (1.23–1.29)1.25 (1.23–1.28)
 41.30 (1.27–1.33)1.29 (1.26–1.32)1.28 (1.25–1.31)
 5 (least deprived)1.32 (1.28–1.36)1.31 (1.27–1.35)1.29 (1.26–1.33)

IRR: incidence rate ratio (the annual incidence in children treated for asthma divided by the annual incidence among children not treated for asthma). #: adjusted for age, sex, deprivation quintile and ethnic group (as appropriate); : also adjusted for maternal age, maternal smoking, parity, mode of delivery, gestation at delivery, sex-gestation-specific birthweight centile and 5-min Apgar score.