We investigated changes in condom use after HIV diagnosis. The study population comprised 78 asymptomatic HIVinfected subjects recruited from a clinic in Oslo, Norway, during 1988-92. In total, 240 follow-up visits were carried out. The response variable was repeated measurements of whether or not condoms were always used during anal/vaginal intercourse at follow-up. The explanatory variables were: time from HIV diagnosis to follow-up, exposure group (heterosexually infected, homosexual men, or infected through injecting drug use), time of HIV diagnosis (before 1987 or later), and history of condom use before HIV diagnosis. Random effects logistic regression analysis was used to study incremental changes in condom use, accommodating an unbalanced repeated measurement design. The use of condoms increased monotonously over time after HIV diagnosis in all exposure groups. Condom use was least likely among injecting drug users, subjects diagnosed before 1987 and subjects without a history of frequent condom use before HIV diagnosis.
Dawson JM, Fitzpatrick RM, Reeves G., Boulton M., McLean J., Hart GJ, et al. Awareness of sexual partners' HIV status as an influence upon high-risk sexual behaviour among gay men. AIDS1994; 8: 837-41.
2.
Bochow M., Chiarotti F., Davies P., Dubois Arber F, Dur W., Fouchard J., et al. Sexual behaviour of gay and bisexual men in eight European countries . AIDS Care1994; 6: 533-49.
3.
Desenclos JC , Papaevangelou G., Ancelle Park R. Knowledge of HIV serostatus and preventive behaviour among European injecting drug users. The European Community Study Group on HIV in Injecting Drug Users. AIDS1993; 7: 1371-7.
4.
Donovan C., Mearns C., McEwan R., Sugden N.A review of the HIV-related sexual behaviour of gay men and men who have sex with men. Aids Care1994; 6: 605-17.
5.
Rezza G., Rota MC, Buning E., Hausser D., O'Hare P., Power R.Assessing HIV prevention among injecting drug users in European Community countries: a review. Soz Praventivmed1994 ; 39 Suppl 1: 61-78.
6.
White D., Phillips K., Mulleady G., Cupitt C.Sexual issues and condom use among injecting drug users. AIDS Care1993; 5: 427-37.
7.
Rhodes T., Donoghoe M., Hunter G., Soteri A., Stimson GVSexual behaviour of drug injectors inLondon: implications for HIV transmission and HIV prevention. Addiction1994; 89: 1085-96.
8.
Hickson FC, Reid DS, Davies PM, Weatherburn P., Beardsell S., Keogh PGNo aggregate change in homosexual HIV risk behaviour among gay men attending the Gay Pride festivals, United Kingdom, 1993-1995. AIDS1996; 10: 771-4.
9.
Veierød MB, Eskild A., Stigum H., Thorvaldsen J., Magnus P.Prevalence and trends in homosexual behaviour in Norway. Scand J Soc Med1997; 25: 33-8.
10.
Myers T., Godin G., Lambert J., Calzavara L., Locker D.Sexual risk and HIV-testing behaviour by gay and bisexual men in Canada . AIDS Care1996; 8: 297-309.
11.
Chetwynd J., Chambers A., Hughes AJCondom use in anal intercourse amongst people who identify as homosexual, heterosexual or bisexual. N Z Med J1992; 105: 262-4.
12.
Gruer LD, Ssembatya Lule G. Sexual behaviour and use of the condom by men attending gay bars and clubs in Glasgow and Edinburgh. Int J STD AIDS1993; 4: 95-8.
13.
Dubois Arber F, Masur JB, Hausser D., Zimmermann E., Paccaud F.Evaluation of AIDS prevention among homosexual and bisexual men in Switzerland. Soc Sci Med1993; 37: 1539-44.
14.
Cribier B., Schmitt MP, Le Coz C., Grosshans E.Changes in sexual behaviour of patients attending an HIV testing centre: a prospective study 1988-1994. Genitourin Med1996; 72: 37-42.
15.
McCusker J. , Stoddard AM, McDonald M., Zapka JG, Mayer KHMaintenance of behavioral change in a cohort of homosexually active men. AIDS1992; 6: 861-8.
16.
Crofts N., Marcus L., Meade J., Sattler G., Wallace J., Sharp R.Determinants of HIV risk among men who have homosexual sex and inject drugs . AIDS Care1995; 7: 647-55.
17.
Kalichman SC , Greenberg J., Abel GGHIV-seropositive men who engage in high-risk sexual behaviour: psychological characteristics and implications for prevention . AIDS Care1997 ; 9: 441-50.
18.
DeWit JBF , van Griensven GJTime from safer to unsafe sexual behaviour among homosexual men. AIDS1994; 8: 123-6.
19.
Adib SM, Joseph JG, Ostrow DG, Tal M., Schwartz SARelapse in sexual behavior among homosexual men: a 2-year follow-up from the Chicago MACS/CCS. AIDS1991; 5: 757-60.
20.
Adib SM, Joseph JG, Ostrow DG, James SAPredictors of relapse in sexual practices among homosexual men. AIDS Educ Prev1991; 3: 293-304.
21.
Catchpole MA , Mercey DE, Nicoll A., Rogers PA, Simms I., Newham J., et al. Continuing transmission of sexually transmitted diseases among patients with HIV-1 attending genitourinary medicine clinics in England and Wales. Br Med J1996 ; 313: 539-42.
22.
ACSF investigators.AIDS and sexual behaviour in France. Nature. 1992 ; 360: 407-9.
23.
Johnson AM, Wadsworth J., Wellings K., Bradshaw S., Field J.Sexual lifestyles and HIV risk. Nature1992 ; 360: 410-2.
24.
Melbye M., Biggar RJInteractions between persons at risk for AIDS and the general population in Denmark. Am J Epidemiol1992; 135: 593-602.
25.
Stigum H., Magnus P., Bakketeig LSFrequency of sexual partner change in a Norwegian population. Data distribution and covariates. Am J Epidemiol1997; 145: 636-43.
26.
Turner CF, Danella RD, Rogers SMSexual behavior in the United States 1930-1990: trends and methodological problems. Sex Transm Dis1995; 22: 173-90.
27.
DeVincenzi I.A longitudinal study of human immunodeficiency virus transmission by heterosexual partners. European Study Group on Heterosexual Transmission of HIV. N Engl J Med1994; 331: 341-6.
28.
Downs AM, de Vincenzi I.Probability of heterosexual transmission of HIV: relationship to the number of unprotected sexual contacts. European Study Group in Heterosexual Transmission of HIV. J Acquir Immune Defic Syndr Hum Retrovirol1996; 11: 388-95.
29.
Padian NS, Shiboski SC, Jewell NPFemale-to-male transmission of human immunodeficiency virus. JAMA1991; 266: 1664-7.
30.
Eskild A., Magnus P., Brekke T., Bruun JN, Heger B., Froland SS, et al. The impact of exposure group on the progression rate to acquired immunodeficiency syndrome. A comparison between intravenous drug users, homosexual men and heterosexually infected subjects. Scand J Infect Dis1997; 29: 103-9.
31.
Notification system for infectious diseases (MSIS); 4. Oslo: National Institute of Public Health , 1992.
32.
Fahrmeir L., Tutz G.Multivariate statistical modelling based on generalized linear models. New York: Springer, 1994.
33.
Hedeker D., Gibbons RD. MIXOR - A computer program for mixed-effects ordinal probit and logistic regression analysis. Comput Methods Programs Biomed , 1997; 49: 157-76.
34.
Little RJA , Rubin DBStatistical analysis with missing data. New York: Wiley, 1987.
35.
Kok G.Targeted prevention for people with HIV/ AIDS: feasible and desirable? New challenges for social and behavioural sciences. Second European Conference on the Methods and Results of Social and Behavioural Research on AIDS, 12-15 January 1998. Paris, 1998: 63.
36.
Kvalem IL, Sundet JM, Rivo KI, Eilertsen DA, Bakketeig LSThe effect of sex education on adolescents' use of condoms: applying the Solomon four-group design. Health Educ Q, 1996; 23: 34-47.
37.
Stigum H., Magnus P., Veierod M., Bakketeig LSImpact on STD spread of increased condom use by young females, 1987-1992 . Int J Epidemiol, 1995; 24: 813-20.
38.
Bartos M.HIV risk assessment in relation to the changing meaning of HIV infection. New challenges for social and behavioural sciences. Second European Conference on the Methods and Results of Social and Behavioural Research on AIDS, 12-15 January 1998. Paris, 1998; 62.
39.
Magnus P., Samuelsen SO, Eskild A., Stigum H.The scope of HIV testing in the Norwegian population seen in relation to sexual behaviour (in Norwegian). Tidsskr Nor Laegeforen , 1994; 114: 3064-7.
40.
Amundsen EJThe HIV/AIDS epidemic in Norway, Denmark and Sweden among men having sex with men (in Norwegian). Oslo: National Institute of Public Health, 1994.
41.
Report from the 1987 and 1992 Norwegian Sexual Surveys (in Norwegian) . Oslo: Department of Epidemiology, National Institute of Public Health, 1994 .
42.
Sutton S.The past predicts the future: interpreting behaviour-behaviour relationships in social psychological models of health behaviours. In: Rutter DT, Quine L, editors. Social psychology and health. Aldershot: Avebury, 1994.
