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Increasing incident statin prescribing for older people and individuals without previous cardiovascular conditions: A nation wide registry study. Helle Wallach Kildemoes, MPH, PhD Morten Andersen, MD, PhD Research Unit of General Practice, Institute of Public Health,
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Increasing incident statin prescribing for older people and individuals without previous cardiovascular conditions: A nation wide registry study Helle Wallach Kildemoes, MPH, PhD Morten Andersen, MD, PhD Research Unit of General Practice, Institute of Public Health, University of Southern Denmark Odense, Denmark
Background • Statin utilization has increased substantially over the last decade Growing evidence of the beneficial effects of statins in a range of new conditions Lower out-of-pocket costs • A prescribing shift in General Practice: From treatment of post MI patients to general prevention of cardiovascular disease?
Aim • To estimate to what extent incident statin prescribing on new indications accounts for the growth in statin utilisation during the last decade • Analysing prevalence and incidence of treatment according to indication, age and gender
A closed Danish cohort • All Danish inhabitants by January 1 1996 • Statin utilisation among adults were followed in the registries during 1996-2005
Three Registries from Statistics DenmarkLinked by a person code Drug utilization and hospitalization At the individual level Demographic Data Year of birth, gender, date death/emigration Nationwide Prescription Registry (1995-2005) Dispensed out-patient prescriptions antidiabetics and cardiovascular drugs – including statins Dispensing date, ATC code National Patient Registry(1978-2005) Hospital discharge diagnoses and proceduresCardiovascular Diseases (CDV), Diabetes Date, ICD10 /ICD8 codes
Method:Disease markers for Statin indication No information about indication for prescribing Disease markers as a proxy for statin indication CV conditions: Guideline recommendation for statin Assuming CV condition with best evidence: Indication for initiating statin therapy Combined information from Patient and Prescription Registry To assign current CVD status for all cohort members
Conclusion • Growing statin utilization reflects the broader range of condition for initiating statin treatment • The largest growth in incident statin prescribing was found among the oldest (75+) • Half of the growth in incident prescribing between 2000-2005 is explained by treatment among individuals without prior markers of CVD The middle-aged at CVD risk carry most weight • The changing prescribing behaviours among GP’s- related to the use of the risk score scheme?