Trial of Male Circumcision: HIV, Sexually Transmitted Disease (STD) and Behavioral Effects in Men, Women and the Community

Trial of Male Circumcision: HIV, STD and Behavioral Effects in Men, Women and the Community

This randomized controlled trial conducted in Rakai District, Uganda, has enrolled 997 HIV positive men and 500 men who declined to learn HIV results (regardless of HIV status). The hypotheses are that male circumcision will be acceptable to and safe in both groups and will reduce the rates of STD acquisition in both groups and of HIV acquisition in HIV-negative men.

Enrollment was ended on Dec 12, 2006, following an interim Data Monitoring and Safety Board (DSMB) review of a closed report. At that time the DSMB determined that futility with respect to the female HIV outcome. There was an non-significantly higher rate of HIV acquisition in women partners of HIV+ men in couples who had resumed sex prior to certified post-surgical wound healing. The data indicated significant reductions (~50%) in GUD symptoms among circumcised HIV+ men. The DSMB recommended: 1) that men and women should continue to be followed in complete two year follow up on all, 2) that circumcision for remaining HIV+ intervention arm men and for control arm men who had completed their 2 year follow should continue, contingent on a) revision of the study protocol to add additional post-surgical visits to assess wound healing, b) protocol revision to further strengthen education for both male and female partners on the need to postpone sex until certified wound healing, and c) approval of the revised protocol by the IRBs in both the US and Uganda. 3) An additional follow up visit for women be instituted at 18 months after enrollment. Protocol revision and IRB approvals have been finalized in June, 2007.

The study has also enrolled and is following 3,700 women sexual partners of men enrolled in this study and in a complementary National Institutes of Health (NIH) funded study (U1 AI51171 which is separately registered). The hypotheses are that male circumcision will be acceptable to and safe in women partners, and will reduce the women's acquisition of HIV and STDs such as herpes simplex virus-2 (HSV-2) and human papillomavirus (HPV).

STUDY DESCRIPTION:

The study is being carried out by the Rakai Health Sciences Program, a research collaboration between the Uganda Virus Research Institute/Uganda Ministry of Health, Johns Hopkins Bloomberg School of Public Health and researchers from Makerere University, Kampala, Uganda.

• The study, being conducted in Rakai District, Uganda, has enrolled 997 HIV+ and following a detailed informed consent process, randomizing them to receive either immediate (within several days or weeks) or delayed (two years) circumcision. The goals are to assess the safety and acceptability of male circumcision among HIV+ men, and to assess potential effects of male circumcision on the acquisition of STDs such as HSV-2. Hypotheses are that male circumcision will be acceptable to and safe in HIV+ men, will reduce the rate of acquisition of STDs, and will reduce the frequency of STD symptoms, such as genital ulceration.
• The study has also enrolled 500 men who, regardless of their HIV status, decline to receive their HIV results, despite encouragement to do so. Hypotheses are that circumcision will be acceptable and safe in men who decline their HIV results, and will reduce the rate of acquisition of HIV and STDs, and the frequency of STD symptoms such as genital ulcers.
• The study has enrolled 3,700 female partners of the men in groups 1 and 2 above, as well as of 5,000 HIV-negative men enrolled in a complementary NIH-funded study of male circumcision for HIV prevention (U1 AI51171 which is being separately registered). Following informed consent, the women partners are being followed annually to assess the acceptability and safety of male circumcision in female partners, and potential effects of male circumcision on HIV and STD acquisition. The hypotheses are that male circumcision will be acceptable to and safe in women partners, and will reduce the acquisition of HIV and STDs such as HSV-2 and HPV (human papilloma virus which causes cervical cancer.)
• Finally, the study is also following ~3,000 men and women in the ~50 communities where the circumcision trials are taking place, in order to assess community attitudes towards and knowledge of male circumcision, and to assess whether other preventive behaviors (abstinence, monogamy, numbers of partners, condom use, etc...) change in the community once circumcision becomes available. The hypothesis is that male circumcision will be acceptable in the community and will not result in behavioral disinhibition (increased rates of high risk behaviors).

The Gates-funded study being registered here is complementary to a separate NIH-funded trial of male circumcision in HIV-negative men who accept their HIV results, being carried out by the Rakai Health Sciences Program study team. The latter study, which is enrolling 5000 HIV-negative men, is designed to answer whether male circumcision is acceptable and safe in HIV-neg men, and whether the procedure reduces the acquisition of HIV and STDs.

The complementary Gates-funded trial is designed to answer the following additional questions:

• Is male circumcision acceptable to and safe in HIV-infected men, and will it reduce the rates of acquisition of STDs in these men?

These questions are of great importance for future circumcision programs:

• Will such programs need to screen out HIV+ men (if circumcision is shown to be unsafe in such men, potentially as a result of delayed healing) or should future programs include HIV+ men, if the procedure is safe in them, and has potential benefits such as reduced STD acquisition, improved genital hygiene and reduced rates of STD symptomatology?
• Is male circumcision acceptable and safe in men who decline their HIV results, and will it reduce rates of acquisition of HIV and STDS in these men?

From prior Rakai Program data, the researchers know that men who decline their HIV results tend to have higher risk behaviors. Determining potential circumcision risks in these men (such as, potentially delayed healing because of their higher risk behaviors) or benefits (such as potentially, reduced rates of HIV and STD acquisition) is thus very important for the design of any future large scale circumcision programs. From the public health viewpoint, it will be important to know whether such programs should include or exclude men who decline HIV results. (Please note: the Rakai Program strongly recommends and encourages the receipt of HIV results, and provides the results confidentially and free of charge. The great majority of Rakai Program research participants (85-90%) accept their HIV results, but a minority continue to decline, although the latter group is getting smaller every year. In addition, please also note that even if participants decline their HIV results, the Rakai Program still provides them with detailed HIV prevention education and counseling.) Enrollment of men who decline their HIV results is also congruent with Ugandan Ministry of Health Policy, which encourages but does not force individuals and study participants to receive their HIV results.

Enrollment of female partners is designed to answer important questions regarding potential effects of male circumcision on women. Should male circumcision reduce HIV and STD acquisition in women, this would represent an additional important public health benefit of the procedure and would add to the cost effectiveness of male circumcision programs. However, if the procedure is associated with increased HIV transmission (for example, due to increased transmission before a circumcision surgical would is fully healed), it is crucial that such a potential risk be identified rapidly within a trial, in order to prevent the risk within trials and in any potential future circumcision programs.

Following enrollment, men in the circumcision arm are followed post-operatively at weekly intervals until wound healing is fully certified, , at 4-6 weeks, 6 months, 12 months and 24 months. Men in the control arm are followed at 4-6 weeks and 6, 12 and 24 months. At baseline and follow up, men respond to a detailed sociodemographic, behavioral and health questionnaire, and provide biological samples (venous blood, urine, sub-preputial swabs [prior to circumcision] and for circumcised men, foreskins are collected at time of surgery.) Samples will allow assessment of multiple infections, including HIV, HSV-2, gonorrhea, chlamydia and syphilis.

Women partners are followed annually, through the Rakai Community Cohort Study. Following written informed consent, women are administered a detailed sociodemographic, behavioral and health status questionnaire, and provide venous blood and self-administered vaginal swabs at baseline and study follow up visits. The samples will allow assessment of multiple infections and conditions, including HIV, syphilis, gonorrhea, chlamydia, trichomonas, bacterial vaginosis, HSV-2 and HPV. Women partners of HIV+ men receive additional visita at 6 and 18 months post enrollment.

Community members (men not in the trials, and women who are not partners of men in the trials) are followed annually through the Rakai Community Cohort Study.

Services offered by the Rakai Program to all study participants include HIV and STD prevention education (information on behavioral risk factors and on abstinence, monogamy, being faithful and condom use), free condoms, free HIV counseling and testing for individuals and couples, free STD treatment, access to Rakai Program clinics for general health care, access to Rakai clinics for free HIV antiretroviral (ARV) drug screening and services, prophylaxis for opportunistic infections and nevirapine services for the prevention of mother-to-child HIV transmission. Please note: residents in the 50 villages where the circumcision trials are being conducted have access to Rakai clinics and ARV services whether or not they consent to be in Rakai studies, in order to avoid undue pressure to participate.

Inclusion Criteria:

MALES randomized to circumcision:

• Age 15-49
• Able and willing to provide written informed consent
• Have no medical contraindications to male circumcision

FEMALE partners:

• Able and willing to provide written informed consent
• No age limit

Exclusion Criteria:

• Medical contraindications, including penile pathology or anemia (males). Unable or unwilling to provide informed consent.

Please note: for participants under age 18, the study follows informed consent/assent procedures as required under US Federal Regulations. The latter are also consistent with Ugandan policy.