High heterogeneity for 15-64 years only. Meta-analysis of 4 cities - Brisbane, Melbourne, Perth Sydney. ICD9: 466, 480-486 ICD10: J12-J17, J18.0, J18.1, Jl8.8, JI8.9, J20, J21 Emergency department visits Asthma 1-4 years: 2.3% n/a n/a 1.022 (0.996-1.049) n/a Recommended (1.4-3.2%) per 13.6 per 25 ppb CRF: 1-14 years: ppb () 1.8% (1.1-2.5%) per 5-9 years: 2.1% () 13.6 ppb (0.7-3.5%) per 13.6 () (). ppb Pooled results from 10-14 years: No 3 cities and 2 effect. studies. 1-14 years: 1.8% 8-hour maximum. (1.1-2.5%) per 13.6 Age: 0-99 years. ppb () 1-hour maximum. Lag 01. Greater significant effects in warm months but not cool months. ICD9: 493 Children
High heterogeneity for 15-64 years only. Meta-analysis of 4 cities - Brisbane, Melbourne, Perth Sydney. ICD9: 466, 480-486 ICD10: J12-J17, J18.0, J18.1, Jl8.8, JI8.9, J20, J21 Emergency department visits Asthma 1-4 years: 2.3% (1.4-3.2%) per 13.6 ppb 5-9 years: 2.1% (0.7-3.5%) per 13.6 ppb 10-14 years: No effect. 1-14 years: 1.8% (1.1-2.5%) per 13.6 ppb () 1-hour maximum. Lag 01. Greater significant effects in warm months but not cool months. ICD9: 493 Children n/a n/a 1.022 (0.996-1.049) per 25 ppb () () () Pooled results from 3 cities and 2 studies. 8-hour maximum. Age: 0-99 years. n/a Recommended CRF: 1-14 years: 1.8% (1.1-2.5%) per 13.6 ppb ().
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