title: [Drug utilization in adults: prevalence and individuals determinants].
abstract: OBJECTIVE
  To study epidemiological patterns of drug utilization and its individual determinants and to classify drugs used into pharmacological groups.
  
  
  METHODS
  In a population-based cross-sectional study, 3,182 subjects aged 20 years or more were selected from an urban area in Southern Brazil using a multi-stage sampling design. Data were collected through home interviews using a structured questionnaire. Drug use in the previous 15 days was recorded. Crude analysis was performed using the Chi-square test for heterogeneity and trend and t-test for means' comparison. The adjusted analysis was carried out using Poisson regression.
  
  
  RESULTS
  The overall prevalence of drug utilization was 65.9%. The highest prevalences of drug use after adjusting for confounding were seen among elderly women in the upper economic class who had ill health self-perception. Analgesics, anti-inflammatory and anti-hypertensive drugs were the most frequently used drugs.
  
  
  CONCLUSIONS
  The prevalence of drug use was found to be higher than in other national and international studies. Studies focusing on individual determinants of drug utilization can identify those groups with higher use. This knowledge might encourage specific strategies to decrease drug use and lead to restrictive policies concerning drug prescription and sale.
authors.affiliation: Programa de Pós-Graduação em Epidemiologia, Faculdade de Medicina, Universidade Federal de Pelotas, Pelotas, RS, Brasil. abertoldi@epidemio-ufpel.org.br
authors.forename: Andréa D
authors.initials: AD
authors.lastname: Bertoldi
authors.forename: Aluísio J D
authors.initials: AJ
authors.lastname: Barros
authors.forename: Pedro C
authors.initials: PC
authors.lastname: Hallal
authors.forename: Rosângela C
authors.initials: RC
authors.lastname: Lima
mesh_terms: D000328:Adult; D000368:Aged; D000700:Analgesics / Q000145:classification; D001938:Brazil / Q000453:epidemiology; D002317:Cardiovascular Agents / Q000145:classification; D004358:Drug Therapy / Q000706:statistics & numerical data*; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence
chemical_list: D000700:Analgesics; D002317:Cardiovascular Agents