Patient Demographics and the Utilization of a Novel 3-Anatomic-Site Testing Panel Including Rectal Self-Collection as Compared With Usual Care Testing

Background: At Kaiser Permanente Mid-Atlantic States, we designed a 3-anatomic-site panel (urine, oropharynx, and rectum) with a self-collect feature for rectal sites. We compared the proportion tested at each anatomic site, demographic factors, and HIV status between those who received the 3-site panel versus usual care.

Methods: Patients entered our laboratories without a prior appointment and underwent urine (usual care [patient collected]), oropharynx (laboratory technician collected), and rectal site (patient collected) testing. Providers recommended the panel to their patients. Patients then had the choice to accept or to reject the panel. Multivariate and logistic regressions were conducted to explore the relationship of age, sex, race, and HIV status with Neisseria gonorrhoeae (GC) and Chlamydia trachomatis (CT) test results as well as the type of testing (3-site panel vs. usual care testing) received.

Results: A total of 145,854 patients received usual care testing as compared with 9227 who received the panel. For those who underwent usual care testing, 4.0% tested positive for CT and 0.85% for GC. For those who received the panel, 9.1% tested positive for CT and 6.4% for GC. Those who received the 3-site panel were more likely to test positive for CT (odds ratio [OR], 2.70; confidence interval [CI], 2.46-2.97) and GC (OR, 4.00; CI, 3.59-4.64). White patients were the most likely to receive the panel compared with Black patients (OR, 3.14; CI, 2.96-3.33). Patients with HIV had greater odds of undergoing the panel (OR, 15.62; CI, 14.67-16.64) and of testing positive for CT (OR, 1.27; CI, 1.07-1.51) and GC (OR, 1.39; CI, 1.14-1.68).

Conclusions: Patients who received the panel had higher odds of testing positive for CT and GC compared with patients with usual testing. Physician training may address the racial and sex differences observed in the panel enrollment and increase utilization. Self-collection for rectal sites should lead to higher detection of CT and GC.