ANTIBIOTIC USE FOR INPATIENT BRONCHIOLITIS: DID NATIONAL GUIDELINES CHANGE PRACTICE?

Abstract

BACKGROUND: Millions of infants and young children are affected by bronchiolitis annually around the globe. This viral lower respiratory tract infection often results in hospital admissions, thus impacting the cost of the healthcare system. Because of its heterogeneous clinical presentation, inpatient management practices amongst paediatricians varies widely. The publication of national guidelines by the Canadian Paediatric Society (CPS) in 2014 was aimed at decreasing the use of unnecessary investigations and therapies for inpatient management of bronchiolitis. OBJECTIVES: To evaluate the levels of antibiotic prescriptions and supportive investigations for inpatient management of bronchiolitis before and after the publication of national guidelines. DESIGN/METHODS: This study is a single-centre retrospective chart review of inpatients with confirmed cases of bronchiolitis. We included children with no other relevant co-morbidities, aged 1-24 months, who were admitted from November 2011 -October 2016. We excluded those who were born less than 35 weeks gestational age and patients with chronic complex medical problems. Our inclusion and exclusion criteria mirrored those used in the CPS guidelines. Those admitted prior to December 2014 were analysed in the pre-guidelines cohort and the remaining were placed in the post-guidelines cohort. The main outcome was antibiotic prescription during the hospital stay. Secondary outcomes included the frequency of chest x-rays, nasopharyngeal swabs, and blood cultures. RESULTS: 131 patients were included in the first (pre-guideline) cohort and 71 in the second (post-guideline) cohort. The overall initiation of antibiotics was almost equal in both cohorts, regardless of whether a chest x-ray was ordered (p=1.000). There was no significant difference in the number of chest x-rays ordered between cohorts (p=0.099). The percentage of patients discharged on antibiotics were significantly lower in the second cohort (p=0.018). More antibiotics were discontinued after a viral cause was isolated in the second cohort (p=0.001). The gender distribution, mean age and mean length of stay were almost equivalent between the cohorts. CONCLUSION: Our study did not show a significant change in antibiotic prescription despite the release of national guidelines. We found that isolating a viral aetiology often leads to the discontinuation of antibiotics. This study emphasizes the need for local antimicrobial stewardship initiatives to reduce the use of unnecessary antibiotics.