Increasing Incidence of Hospitalization for Bronchiolitis among Canadian Children, 1980–2000

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Abstract
We evaluated temporal trends in hospitalization for bronchiolitis found among Canadian children for 1980–2000. The rate of hospital admission increased in all provinces over the 2 decades for all age groups but was highest in those aged <6 months. The mean length of stay decreased from 5.4 to 3.1 days (mean rate of decrease, 0.13 days/year; P<.0001). Because a concurrent increase in other respiratory diagnostic codes was not seen, it is unlikely that physician practice variation could explain this consistent trend over almost 2 decades, which may indicate a change in disease prevalence or severity

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