The Impact of the American College of Obstetricians and Gynecologists Guideline Changes in Pap Tests on Annual Chlamydia Test Rates.

PURPOSE: To assess impact of the 2009 American College of Obstetricians and Gynecologists (ACOG) Pap guideline changes on chlamydia testing rates among sexually active young women.

METHODS: The study included sexually active women aged 15-25 years enrolled in commercial health plans from 2005 to 2014. We identified sexually active women by diagnosis, procedure, and drug codes in inpatient, outpatient, and drug claims databases. We identified Pap tests and chlamydia tests among sexually active adolescents (15-20 years) and young adults (21-25 years) over time. Using piecewise regression models, we compared the change in chlamydia testing rates before and after 2009 ACOG guidelines.

RESULTS: From 2005 to 2014, chlamydia testing rates in sexually active women increased from 23% to 37% among adolescents and from 24% to 43% among young adults. Although the overall increase in chlamydia testing was positive, the annual rate of change in chlamydia testing (slope) decreased significantly after the 2009 ACOG guideline change from 1.9% before to 1.0% after for adolescents (p < .05) and from 2.5% to 1.7% for young adults (p < .05).

CONCLUSIONS: Although chlamydia test rates are increasing among sexually active women aged 15-25 years from 2005 to 2014, the slower growth in chlamydia testing rate after 2009 may relate to the change in the Pap testing guidelines. Our finding that more than half of sexually active women aged 15-25 years did not have chlamydia testing and that the rate of increased chlamydia testing slowed after 2009 suggests that interventions to improve chlamydia testing apart from combining with Pap testing are still needed.