A Comparison of Syphilis Partner Notification Outcomes by Reported Use of Internet-based Apps to Meet Sex Partners in North Carolina, 2013-2016.

Abstract

Partner notification services (PNS) remain the backbone of syphilis control. The popularity of Internet-based apps to meet sex partners among early syphilis (ES) patients may hinder the success of PNS if partners cannot be located. We compared demographic and clinical characteristics between male ES patients indicating sex with men (MSM) and reported in North Carolina between 2013 and 2016 by reported use of an Internet-based app to meet sex partners (app user). We used multivariable log-binomial regression to assess the association between app usage and ES exposure notification of 1 or more sex partner. Among 3414 MSM ES patients, 58.6% were app users. App users were more frequently white (33.2% vs 27.3%; P = 0.003), younger (median, 28 years vs 30 years; P = 0.0002) and less frequently human immunodeficiency virus coinfected (54.1% vs 58.2%; P = 0.02) compared to non-app users. Overall, 94.9% of app users and 89.6% of non-app users reported 1 or more sex partner. App users reported 2.5 times more locatable and 2.7 times more unlocatable sex partners than non-app users. Similar proportions of app (23.6%) and non-app users (25.0%) reported only unlocatable partners (P = 0.4). App usage was not associated with ES exposure notification of 1 or more sex partner (adjusted risk ratio, 0.99; 95% confidence interval, 0.87-1.13). We observed no difference in the proportion of locatable partners or likelihood of notifying 1 or more sex partner of exposure among MSM ES patients, by reported use of Internet-based apps to meet sex partners. Partner notification services continues to be an important mechanism to locate and assure treatment for sex partners in this population.