Minimal coital dilution in Accra, Ghana

Samuel M. Jenness, Adriana A.E. Biney, William K. Ampofo, Francis Nii Amoo Dodoo, Susan Cassels

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Background: Coital dilution, the reduction in the coital frequency per partner when an additional ongoing partner is added, may reduce the transmission potential of partnership concurrency for HIV and other sexually transmitted infections. Empirical estimates of dilution, especially dilution of sexual acts unprotected by condoms, are needed to inform prevention research. Methods: Sexually active adults in Accra, Ghana were recruited in a multistage household probability sample. Degree (number of ongoing partners), total acts, and unprotected acts were measured retrospectively for each month in the past year through an event history calendar. Random-effects negative binomial models estimated the association between degree and coital frequency. Results: Compared with person-months with a single partner (monogamy), 2.06 times as many total acts and 1.94 times as many unprotected acts occurred in months with 2 partners. In months with 3 partners, 2.90 times as many total acts and 2.39 times as many unprotected acts occurred compared with monogamous months. Total acts but not unprotected acts also declined with partnership duration. Conclusions: No dilution was observed for total acts with up to 3 concurrent partners, but a small amount of dilution was observed for unprotected acts for months with multiple concurrencies. This suggests moderate selective condom use in months with multiple concurrencies. The implications of the observed dilution for future HIV transmission must be investigated with mathematical models.

Original languageEnglish (US)
Pages (from-to)85-91
Number of pages7
JournalJournal of Acquired Immune Deficiency Syndromes
Volume69
Issue number1
DOIs
StatePublished - May 1 2015

All Science Journal Classification (ASJC) codes

  • Infectious Diseases
  • Pharmacology (medical)

Fingerprint Dive into the research topics of 'Minimal coital dilution in Accra, Ghana'. Together they form a unique fingerprint.

  • Cite this