title: The validity of self-reported likelihood of HIV infection among the general population in rural Malawi.
abstract: BACKGROUND
  Understanding HIV risk perception is important for designing appropriate strategies for HIV/AIDS prevention, because these interventions often rely on behaviour modification. A key component of HIV risk perception is the individual's own assessment of HIV status, and the extent to which this assessment is correct. However, this issue has received limited attention.
  
  
  OBJECTIVE
  To examine the validity of self-reported likelihood of current HIV infection among the general population in rural Malawi.
  
  
  METHODS
  As part of a panel household survey, data on behaviour and biomarkers were collected for a population-based sample of approximately 3000 respondents in rural Malawi aged > or = 15 years. Information on self-assessed likelihood of currently having HIV was collected by survey interview. Saliva was obtained from all consenting respondents to assess actual HIV status.
  
  
  RESULTS
  Of 2299 survey respondents who assessed their likelihood of being infected with HIV at the time of the survey, 71% were accurate. Most incorrect assessments (88%) were due to respondents overestimating (rather than underestimating) their likelihood of being infected with HIV. Women were less likely than men to correctly assess their HIV status. The two most important predictors of false-positive responses were marital status and self-reported health.
  
  
  CONCLUSIONS
  Self-reports of HIV infection were generally valid. Most invalid self-reports were due to overestimating the risk of having HIV. The implications of this finding are highlighted, as they pertain to the design of HIV prevention interventions and the expansion of HIV counselling, testing and treatment programmes in developing countries.
authors.affiliation: Département de Démographie, Université de Montréal, CP 6128, Succursale Centre-ville, Montréal, Canada H3C 3J7. csimona.bignami@umontreal.ca
authors.forename: S
authors.initials: S
authors.lastname: Bignami-Van Assche
authors.forename: L-W
authors.initials: LW
authors.lastname: Chao
authors.forename: P
authors.initials: P
authors.lastname: Anglewicz
authors.forename: D
authors.initials: D
authors.lastname: Chilongozi
authors.forename: A
authors.initials: A
authors.lastname: Bula
mesh_terms: D000293:Adolescent; D000328:Adult; D001294:Attitude to Health; D005260:Female; D015658:HIV Infections / Q000175:diagnosis / Q000453:epidemiology / Q000523:psychology*; D006801:Humans; D008295:Malawi / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D010465:Perception; D012044:Regression Analysis; D018570:Risk Assessment; D012423:Rural Health; D012463:Saliva / Q000821:virology; D012649:Self Concept; D014342:Truth Disclosure