A. P. M. Coxon

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Questionnaires and diaries have complementary biases and advantages for obtaining information on sexual behaviour but self-completed sexual diaries have the advantage of reducing retrospective bias. In a validation study of homosexual behaviour, sexual diary counts and subsequent questionnaire estimates (together with ratings of the certainty of the(More)
The role of sexual exclusivity (monogamy) in relation to HIV, and the use of rule making in non-exclusive (open) relationships, are discussed. Data from interviews with 387 homosexually active men are presented. The most common sexual/relational configuration amongst these men is that of open relationships. Sexual non-exclusivity was found to be associated(More)
OBJECTIVE To investigate the relationship between alcohol use and unsafe sexual behaviour. METHODS The paper discusses data collected from 461 gay and bisexual men interviewed in England and Wales by Project SIGMA during 1991-1992. These data were collected during face-to-face interviews using retrospective weekly diary techniques and include details of(More)
Cross sectional and longitudinal data on condom use among homosexually active men is presented. Data pertain to two waves of interviewing (1987/8 and 1991) from Project SIGMA, a large longitudinal study of male homosexual behaviour in the light of HIV. Aggregate changes across the time-period indicate an increase in condom use for both insertive and(More)
OBJECTIVE To measure types of sex role prevalence in common and risk-related behaviours among gay men for modelling HIV transmission. DESIGN Cohort study of 385 homosexually active men recording sexual diaries over 1-month periods. METHODS Measures of incidence of behavioural sex roles for masturbation, fellatio, anal intercourse and anilingus by(More)
Incidents of nonconsensual sexual activity among 930 homosexually active men living in England and Wales are analyzed. Of these men, 27.6% said they had been sexually assaulted or had sex against their will at some point in their lives; one third had been forced into sexual activity (usually anal intercourse) by men with whom they had previously had, or(More)
AIMS To assess the reliability of saliva samples as a means of testing for HIV-antibodies outside clinic settings. METHODS Men taking part in a non-clinic longitudinal study of homosexually active men provided samples of saliva and blood. Sera were screened using a competitive ELISA (Wellcozyme) and positive sera were confirmed by an indirect ELISA(More)
As part of a prospective study of the seroprevalence of HIV, a cohort of 930 men were interviewed regarding their condom use. Of the 270 respondents that engaged in insertive anal intercourse in the month preceding interview 38.9% always used a condom, 49.6% never used one, and 11.5% sometimes used one. Of the 254 respondents that engaged in receptive anal(More)