Dataset consists of 3 files: drug_use.csv census.csv drug_names.csv Drug and census data were derived from the following national resources in the public domain: Drug statistics data: https://sdb.socialstyrelsen.se/if_lak/val.aspx (download date: 24.10.2018) http://www.norpd.no/ (download date: 24.10.2018) http://www.medstat.dk/ (download date: 10.01.2018) Census data: https://statistikbanken.dk (download date: 24.10.2018) https://www.ssb.no/ (download date: 24.10.2018) http://www.statistikdatabasen.scb.se (download date: 10.01.2018) The source data owners take no responsibily for interpretation or analysis of data performed by third parties. Source data owners should be attributed when data are used. Consult data owners websites for details about attribution. File descriptions: drug_use.csv contains aggregated information about the number of unique users and the amount (measured in drug daily dose - DDD). Drugs are identified by ATC codes and counts are grouped by the following categorical variables: country (DK, NO, SE) year (2007 - 2017) agegroup (5-9, 10-14, 15-19) sex (F, M) The variables users_pr_1000 and ddd_pr_1000 are the results of dividing the variables n_users and ddd by the total population size in that country, year, agegroup and sex category. These census informations are also available in the census.csv file census.csv contains census data for each country grouped by sex and age. Use this file if you want to calculate population denominators for alternative aggregations of data in the drug_use.csv file drug_names.csv provides the drug name associated to each ATC code