Recent heterosexual partnerships and patterns of condom use: a weighted analysis.
Epidemiology
; 20(1): 44-51, 2009 Jan.
Article
en En
| MEDLINE
| ID: mdl-18813022
ABSTRACT
BACKGROUND:
In epidemiologic studies of sexual partnerships, characteristics are often collected in part through detailed questions concerning recent partnerships. These data present challenges for analysis. First, although research interest generally lies in all partnerships in a certain time period, participants may be asked to provide detailed information only concerning their most recent, up to a fixed number. As more recent partnerships may differ from others, a simple analysis of these data may lead to bias. Second, the total number of partnerships for a study participant may be informative, so the analyst must choose between inference for the population of partnerships or for a typical partnership from the population of individuals. Third, data may be more fully recorded for study participants than their partners, and not all partners may be eligible to participate.METHODS:
We propose weighting to deal with these challenges. Weighting provides a sensitivity analysis for the possible selection bias due to incomplete reporting. We analyze heterosexual condom use in Britain, using data from the National Survey of Sexual Attitudes and Lifestyles 2000.RESULTS:
The sensitivity of estimates to possible selection bias is low. We find that the choice of population for inference is important for prevalence estimates, but has relatively little impact on measures of association. By defining within-participant partnership predictors we demonstrate how participants vary their condom use. We establish that, at least for male participants, shorter partnership duration is linked to a higher probability of condom use at last sex but lower probability at first sex.CONCLUSION:
We recommend a weighted analysis approach to recent partnership data, which can be simply implemented in standard survey analysis software. In other surveys the sensitivity of estimates to possible selection bias may be substantial and this will need to be assessed in each case.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Conducta Sexual
/
Interpretación Estadística de Datos
/
Condones
Tipo de estudio:
Prognostic_studies
/
Qualitative_research
/
Risk_factors_studies
Límite:
Adolescent
/
Adult
/
Female
/
Humans
/
Male
País/Región como asunto:
Europa
Idioma:
En
Revista:
Epidemiology
Asunto de la revista:
EPIDEMIOLOGIA
Año:
2009
Tipo del documento:
Article
País de afiliación:
Reino Unido