Determinants of inter-practice variation in childhood asthma and respiratory infections: Cross-sectional study of a national sentinel network

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Abstract

Objectives Respiratory infections are associated with acute exacerbations of asthma and accompanying morbidity and mortality. In this study we explore inter-practice variations in respiratory infections in children with asthma and study the effect of practice-level factors on these variations. Design Cross-sectional study. Setting We analysed data from 164 general practices in the Royal College of General PractitionersResearch and Surveillance Centresentinel network in England. Participants Children 5-12 years. Interventions None. In this observational study, we used regression analysis to explore the impact of practice-level determinants on the number of respiratory infections in children with asthma. Primary and secondary outcome measures We describe the distribution of childhood asthma and the determinants of upper/lower respiratory tract infections in these children. Results 83.5% (137/164) practices were in urban locations; the mean number of general practitioners per practice was 7; and the mean duration since qualification 19.7 years. We found almost 10-fold difference in the rate of asthma (1.5-11.8 per 100 children) and 50-fold variation in respiratory infection rates between practices. Larger practices with larger lists of asthmatic children had greater rates of respiratory infections among these children. Conclusion We showed that structural/environmental variables are consistent predictors of a range of respiratory infections among children with asthma. However, contradictory results between measures of practice clinical care show that a purely structural explanation for variability in respiratory infections is limited. Further research is needed to understand how the practice factors influence individual risk behaviours relevant to respiratory infections.

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Hoang, U., Liyanage, H., Coyle, R., Godden, C., Jones, S., Blair, M., … De Lusignan, S. (2019). Determinants of inter-practice variation in childhood asthma and respiratory infections: Cross-sectional study of a national sentinel network. BMJ Open, 9(1). https://doi.org/10.1136/bmjopen-2018-024372

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