Article Text
Abstract
Objectives Reproductive aged women are at risk of pregnancy and sexually transmitted infections (STI). Understanding drivers of STI acquisition, including any association with widely used contraceptives, could help us to reduce STI prevalence and comorbidities. We compared the risk of STI among women randomised to three contraceptive methods.
Methods We conducted a secondary analysis to assess the risk of chlamydia and gonorrhoea in a clinical trial evaluating HIV risk among 7829 women aged 16–35 randomised to intramuscular depot medroxyprogesterone acetate (DMPA-IM), a copper intrauterine device (IUD) or a levonorgestrel (LNG) implant. We estimated chlamydia and gonorrhoea prevalences by contraceptive group and prevalence ratios (PR) using log-binomial regression.
Results At baseline, chlamydia and gonorrhoea prevalences were 18% and 5%, respectively. Final visit chlamydia prevalence did not differ significantly between DMPA-IM and copper IUD groups or between copper IUD and LNG implant groups. The DMPA-IM group had significantly lower risk of chlamydia compared with the LNG implant group (PR 0.83, 95% CI 0.72 to 0.95). Final visit gonorrhoea prevalence differed significantly only between the DMPA-IM and the copper IUD groups (PR 0.67, 95% CI 0.52 to 0.87).
Conclusions The findings suggest that chlamydia and gonorrhoea risk may vary with contraceptive method use. Further investigation is warranted to better understand the mechanisms of chlamydia and gonorrhoea susceptibility in the context of contraceptive use.
- contraception
- clinical trials
- chlamydia trachomatis
- neisseria gonorrhoeae
Data availability statement
Data are available on reasonable request. As of the time of publication, data access applications are in process with the governing IRBs of the ECHO trial to make de-identified publicly available.
This is an open access article distributed in accordance with the Creative Commons Attribution 4.0 Unported (CC BY 4.0) license, which permits others to copy, redistribute, remix, transform and build upon this work for any purpose, provided the original work is properly cited, a link to the licence is given, and indication of whether changes were made. See: https://creativecommons.org/licenses/by/4.0/.
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Data availability statement
Data are available on reasonable request. As of the time of publication, data access applications are in process with the governing IRBs of the ECHO trial to make de-identified publicly available.
Supplementary materials
Supplementary Data
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Supplementary Data
This web only file has been produced by the BMJ Publishing Group from an electronic file supplied by the author(s) and has not been edited for content.
Footnotes
JD and NP are joint first authors.
Handling editor Catherine H Mercer
Twitter @DrTimMastro
Funding This work and The Evidence for Contraceptive Options and HIV Outcomes (ECHO) Trial was supported by the combined support of the Bill & Melinda Gates Foundation (grant OPP1032115); the American people through the United States Agency for International Development (grant AID-OAA-A-15–00045); the Swedish International Development Cooperation Agency (grant 2017/762965–0); the South Africa Medical Research Council; and the United Nations Population Fund. Contraceptive supplies were donated by the Government of South Africa and US Agency for International Development.
Disclaimer The contents of this paper are solely the responsibility of the authors and do not necessarily reflect the views, decisions or policies of the institutions with which they are affiliated, the ECHO trial funders or the supporting governments.
Competing interests JMB is an advisor for Gilead Sciences, Merck and Janssen.
Provenance and peer review Not commissioned; externally peer reviewed.
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