Trends in ED Resource Use for Infants 0 to 60 Days Evaluated for Serious Bacterial Infection

OBJECTIVES We examined trends in resource use for infants undergoing emergency department evaluation for serious bacterial infection, including lumbar puncture (LP), antibiotic administration, hospitalization, and procalcitonin testing, as well as the association between procalcitonin testing and LP, administration of parenteral antibiotics, and hospitalization. METHODS We performed a cross-sectional study of infants aged 0 to 60 days who underwent emergency department evaluation for serious bacterial infection with blood and urine cultures from 2010 to 2019 in 27 hospitals in the Pediatric Health Information System. We examined temporal trends in LP, antibiotic administration, hospitalization, and procalcitonin testing from 2010 to 2019. We also estimated multivariable logistic regression models for 2017–2019, adjusted for demographic factors and stratified by age ( RESULTS We studied 106 547 index visits. From 2010 to 2019, rates of LP, antibiotic administration, and hospitalization decreased more for infants aged 29 to 60 days compared with infants aged 0 to 28 days (annual decrease in odds of LP, antibiotics administration, and hospitalization: 0 to 28 days: 5%, 5%, and 3%, respectively; 29–60 days: 15%, 12%, and 7%, respectively). Procalcitonin testing increased significantly each calendar year (odds ratio per calendar year 2.19; 95% confidence interval 1.82–2.62), with the majority (91.1%) performed during 2017–2019. From 2017 to 2019, there was no association between hospital-level procalcitonin testing and any outcome studied (all P values > .05). CONCLUSIONS Rates of LP, antibiotic administration, and hospitalization decreased significantly for infants 29 to 60 days during 2010–2019. Although procalcitonin testing increased during 2017–2019, we found no association with hospital-level procalcitonin testing and patterns of resource use.