Svein Gjelstad1, Ingvild Dalen, Morten Lindbaek. 1. Department of General Practice and Community Medicine, Antibiotic Centre for Primary Care, University of Oslo, Norway.
Abstract
OBJECTIVE: Inappropriate use of antibiotics is associated with increased antibiotic resistance in the community. About 90% of all antibiotic prescriptions in Norway are issued by general practitioners and in 60% issued for respiratory tract infections. The article describes and analyses antibiotic prescription patterns by general practitioners in Vestfold, Norway. DESIGN: Prospective cohort study. SUBJECTS: A total of 145 list-holding general practitioners in Vestfold, Norway in February to March 2003. METHODS: Merging of two electronic administrative data sets: antibiotic prescriptions dispensed in pharmacies and general practitioners' electronic bills from the National Insurance Agency. MAIN OUTCOME MEASURES: Proportion and type of antibiotic prescribed for different respiratory tract infectious diagnoses. RESULTS: We found large variations among general practitioners' antibiotic prescription habits. In 27% of consultations with RTI diagnoses, an antibiotic was prescribed; 37% were for Penicillin V and 28% for a macrolide. Quinolones and cephalosporins were only rarely prescribed. In a logistic regression analysis the following factors were independently associated with antibiotic prescription rate: type of infection, type of contact, being a general practitioner specialist, and years since medical exam. In another logistic regression analysis the following factors were independently associated with broad-spectrum antibiotic prescription: type of infection, age of patient, type of contact, being a specialist, length of list, and being a high prescriber of antibiotics. CONCLUSION: The variation in proportion of total antibiotic prescribing and broad-spectrum prescription for respiratory tract infections is high, and reveals potentials to change general practitioners' prescription behaviour, in order to maintain the positive situation in Norway as to antibiotic resistance.
OBJECTIVE: Inappropriate use of antibiotics is associated with increased antibiotic resistance in the community. About 90% of all antibiotic prescriptions in Norway are issued by general practitioners and in 60% issued for respiratory tract infections. The article describes and analyses antibiotic prescription patterns by general practitioners in Vestfold, Norway. DESIGN: Prospective cohort study. SUBJECTS: A total of 145 list-holding general practitioners in Vestfold, Norway in February to March 2003. METHODS: Merging of two electronic administrative data sets: antibiotic prescriptions dispensed in pharmacies and general practitioners' electronic bills from the National Insurance Agency. MAIN OUTCOME MEASURES: Proportion and type of antibiotic prescribed for different respiratory tract infectious diagnoses. RESULTS: We found large variations among general practitioners' antibiotic prescription habits. In 27% of consultations with RTI diagnoses, an antibiotic was prescribed; 37% were for Penicillin V and 28% for a macrolide. Quinolones and cephalosporins were only rarely prescribed. In a logistic regression analysis the following factors were independently associated with antibiotic prescription rate: type of infection, type of contact, being a general practitioner specialist, and years since medical exam. In another logistic regression analysis the following factors were independently associated with broad-spectrum antibiotic prescription: type of infection, age of patient, type of contact, being a specialist, length of list, and being a high prescriber of antibiotics. CONCLUSION: The variation in proportion of total antibiotic prescribing and broad-spectrum prescription for respiratory tract infections is high, and reveals potentials to change general practitioners' prescription behaviour, in order to maintain the positive situation in Norway as to antibiotic resistance.
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