Objectives To describe the rates of pediatric antibiotic use across 6 countries on 3 continents. Study design Cross-national analysis of 7 pediatric cohorts in 6 countries (Germany, Italy, South Korea, Norway, Spain, and the US) was performed for 2008-2012. Antibiotic dispensings were identified and grouped into sub- classes. We calculated the rates of antimicrobial prescriptions per person-year specific to each age group, com- paring the rates across different countries. Results A total of 74 744 302 person-years from all participating centers were included in this analysis. Infants in South Korea had the highest rate of antimicrobial consumption, with 3.41 prescribed courses per child-year during the first 2 years of life. This compares with 1.6 in Lazio, Italy; 1.4 in Pedianet, Italy; 1.5 in Spain; 1.1 in the US; 1.0 in Germany; and 0.5 courses per child-year in Norway. Of antimicrobial prescriptions written in Norway, 64.8% were for first-line penicillins, compared with 38.2% in Germany, 31.8% in the US, 27.7% in Spain, 25.1% in the Italian Pedianet population, 9.8% in South Korea, and 8% in the Italian Lazio population. Conclusions We found substantial differences of up to 7.5-fold in pediatric antimicrobial use across several in- dustrialized countries from Europe, Asia, and North America. These data reinforce the need to develop strategies to decrease the unnecessary use of antimicrobial agents

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