Antibiotic allergy labels in children are associated with adverse clinical outcomes

Background: Self-reported antibiotic allergies are common among hospitalized adults and children. However, there is a paucity of studies investigating the impact of an antibiotic allergy label in childhood. Objective: To investigate the impact of antibiotic allergy labeling on clinical outcomes in children. Methods: A retrospective study was conducted in a major pediatric tertiary hospital to capture inpatient admissions (N = 1672) in April 2014 and April 2015. Data, collected by chart review, included documented antibiotic allergy labels, antibiotic prescriptions, admitting specialty, hospital length of stay, and hospital readmissions. Results: Of the 1672 pediatric patients surveyed, 58.1% were male and 44.8% were prescribed antibiotics. Antibiotic allergy labels were recorded in 5.3% of patients; most were β-lactam allergy labels (85%), mostly to unspecified penicillins. There was an increasing incidence of antibiotic allergy label with age, which was statistically significant (P <.001); no sex effect was seen. Patients with antibiotic allergy labels received more macrolide (P =.045), quinolones (P =.01), lincosamide (P <.001), and metronidazole (P =.009) antibiotics than did patients without an antibiotic allergy label. After adjusting for patient age, sex, principal diagnosis, and admitting specialty, children with any antibiotic or β-lactam allergy label had longer hospital stays (odds ratio, 1.62; 95% CI, 1.05-2.50; P =.03) with a mean length of hospital stay of 3.8 days for those without a label and 5.2 days for those with a β-lactam allergy label. Conclusions: This is the first study demonstrating the negative impact of antibiotic allergy labels on clinical outcomes in children, as evidenced by significant alternate antibiotic use and longer hospital stays. © 2018