TP 12 I Want the Kit (IWTK) - What's Your Risk for Having a Sexually Transmitted Infection (STI)?

Tuesday, June 10, 2014
Pre-function Lobby (M2)
Mary Jett-Goheen, BS MT(ASCP)1, Mathilda Barnes, MS, CCRP1, Laura Dize, BS1, Perry Barnes, BS1, Yu-Hsiang Hsieh, PhD2 and Charlotte Gaydos, MS, MPH, DrPH1, 1Department of Medicine, Division of Infectious Diseases, Johns Hopkins University, Baltimore, MD, 2School of Medicine, Department of Emergency Medicine, Johns Hopkins University, Baltimore, MD

Background: IWTK (an internet program that tested for chlamydia, gonorrhea, and trichomonas from self-collected genital swabs) has an educational component that informs users about STIs and uses a quiz for sexually active people to estimate their risk of having an STI.  

Methods:  November 2010-2013, IWTK asked users to take a six-question quiz:

  • Are you ≤ 25 years old?
  • Have you had new or multiple sex partners, last 90 days?
  • Do you have more than one current sex partner?
  • Have you been told you had, or treated for an STI in the past?
  • How many sex partners have you had, last 90 days?
  • Do you use a condom with sex?
Points were assigned to responses for each question and scores calculated.  A score of 7-10 was considered very high risk; 4-6, high risk; 2-3, intermediate risk; 0-1, low risk.

Results:  1,168/2,460 females (47.5%) and 841/1,680 males (50.1%) who returned kits provided risk scores.  Of females, 233/1168 (19.9%) were very high risk; 708/1168 (60.6%), high risk; 171/1168 (14.6%), intermediate risk; 56/1168 (4.8%), low risk.  Trend for female infection by risk score category: p<0.001. Of males, 179/841 (21.3%) were very high risk; 407/841 (48.4%), high risk; 198/841 (23.5%), intermediate risk; 57/841 (6.8%), low risk.  Trend for male infection by risk score category:  p=0.001.  Of very high risk females, 42/233 (18.0%) were infected (chlamydia, gonorrhea, and/or trichomonas); high risk, 80/708 (11.3%); intermediate risk, 12/171 (7.0%); low risk, 4/56 (7.1%).  Of very high risk males, 22/179 (12.3%) were infected; high risk, 26/407 (6.4%); intermediate risk, 7/198 (3.5%); low risk, 2/57 (3.5%). There was a higher infection rate in the high risk group in females than males; (11.3% versus 6.4%, p=0.007).

Conclusions:  Risk scores may predict the likelihood of having an STI. The score may help a user decide whether to order a test kit.