A partner-related risk behavior index to identify people at elevated risk for sexually transmitted infections

Richard Crosby, Lydia A. Shrier

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


The purpose of this study was to develop and test a sexual-partner-related risk behavior index to identify high-risk individuals most likely to have a sexually transmitted infection (STI). Patients from five STI and adolescent medical clinics in three US cities were recruited (N = 928; M age = 29.2 years). Data were collected using audio - computer-assisted self-interviewing. Of seven sexual-partner-related variables, those that were significantly associated with the outcomes were combined into a partner-related risk behavior index. The dependent variables were laboratory-confirmed infection with Chlamydia trachomatis, Neisseria gonorrhoeae, and/or Trichomonas vaginalis. Nearly one-fifth of the sample (169/928; 18.4 %) tested positive for an STI. Three of the seven items were significantly associated with having one or more STIs: sex with a newly released prisoner, sex with a person known or suspected of having an STI, and sexual concurrency. In combined form, this three-item index was significantly associated with STI prevalence (p <.001). In the presence of three covariates (gender, race, and age), those classified as being at-risk by the index were 1.8 times more likely than those not classified as such to test positive for an STI (p <.001). Among individuals at risk for STIs, a three-item index predicted testing positive for one or more of three STIs. This index could be used to prioritize and guide intensified clinic-based counseling for high-risk patients of STI and other clinics.

Original languageEnglish
Pages (from-to)81-87
Number of pages7
JournalJournal of Primary Prevention
Issue number1-2
StatePublished - Apr 2013

Bibliographical note

Funding Information:
Acknowledgments Support for this project was provided by a grant to the first author from the National Institute of Allergies and Infectious Diseases, grant #5 R01 AI068119.


  • Condoms
  • Men
  • Sexual Behavior
  • Sexually transmitted diseases
  • Women

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health


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