title: An economic analysis of persons with prolonged cough in rural northern Vietnam.
abstract: METHODS
  Epidemiological surveillance in the Bavi district, northern Vietnam.
  
  
  OBJECTIVE
  To compare the prevalences of prolonged cough across socio-economic groups defined by income, expenditure and official classification. To investigate inequalities using the Illness Concentration Index.
  
  
  METHODS
  Interviews in 11,547 randomly selected households with 35,832 persons aged 15 years or more. Prolonged cough was identified in 559 persons (1.5%).
  
  
  RESULTS
  Differences between cough prevalences were found for all socio-economic indicators, but were less clear for expenditure. Lower economic groups reported higher prevalences than higher groups, and prevalences were higher among the elderly. Male was similar to female prevalence. The illness gap between the poor and rich was wider for men. The Illness Concentration Index confirmed these findings.
  
  
  CONCLUSIONS
  Inequalities were found when using both different socio-economic indicators and different analysis approaches.
authors.affiliation: Epidemiological Field Laboratory for Health Systems Research in Vietnam, Hanoi. nguyenduykhe2002@yahoo.com
authors.forename: N D
authors.initials: ND
authors.lastname: Khe
authors.forename: A E K
authors.initials: AE
authors.lastname: Thorson
authors.forename: N P
authors.initials: NP
authors.lastname: Hoa
authors.forename: V K
authors.initials: VK
authors.lastname: Diwan
authors.forename: B
authors.initials: B
authors.lastname: Eriksson
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002908:Chronic Disease; D003371:Cough / Q000191:economics* / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012959:Socioeconomic Factors; D014744:Vietnam / Q000453:epidemiology