STI/HIV Testing and Prevalence of Gonorrhea and Chlamydia Among Persons with Their Specified-Type Sex Partner

Previous studies have shown that sexually transmitted infections (STI) and human immunodeficiency virus (HIV) testing has varied, but STI prevalence was not estimated among patients during their health care visits in which a high-risk sexual partnership was documented. This study estimated gonorrhea, chlamydia, syphilis, and HIV testing rates and chlamydia and gonorrhea prevalence. From the de-identified commercial claims data of OptumLabs Data Warehouse, we identified men and women aged 15-60 years classified as having high-risk sexual relationships as diagnosis codes: Z72.51 for opposite-sex, Z72.52 for same-sex, and Z72.53 for same-and-opposite-sex relationships, stratified by gender, age group, region, type of health plan, and HIV status. We estimated STI testing rate and prevalence for chlamydia and gonorrhea among patients with high-risk sexual relationships. HIV testing was assessed only in high-risk sexual relationship patients without HIV. Among 8.2 million females and 7.3 million males aged 15-60 years in the database from 2016 to 2019, 115,884 patients (0.7% of female, 0.8% of male) including 3,535 patients with HIV were diagnosed with high-risk sexual relationships. The testing rates for gonorrhea, chlamydia, syphilis, and HIV were 69.4% (confidence interval [CI]: 69.1-69.7), 68.9% (CI: 68.6-69.2), 43.4% (CI: 43.1-43.7), and 41.7% (CI: 41.4-42.0), respectively. Among patients with valid chlamydia and gonorrhea tests, 7.2% (CI: 7.0-7.5) and 2.6% (CI: 2.4-2.8) had positive chlamydia and gonorrhea test results, respectively, and varied by type of high-risk sexual relationship. Our study findings of suboptimal STI screening among patient in high-risk sexual relationships are consistent with previous studies. Administrative records confirmed by lab results indicate a need for STI counseling, testing, and treatment among patients who are diagnosed with high-risk sexual relationships with same-sex, opposite-sex, or same-and-opposite sex partners.