Trends in pelvic inflammatory disease emergency department visits, United States, 2006-2013.

Background Pelvic inflammatory disease is a female genital tract disorder with severe reproductive sequelae. Because of the difficulties in diagnosing pelvic inflammatory disease, it is not a reportable condition in many states. Females seeking care in emergency departments are a sentinel population for pelvic inflammatory disease surveillance. Objective The objective of the study was to determine trends in diagnoses of acute pelvic inflammatory disease in a nationally representative sample of emergency departments. Study Design All emergency department visits among females aged 15–44 years with an International Classification of Diseases, ninth revision, Clinical Modification diagnosis code indicating pelvic inflammatory disease during 2006–2013 were assessed from the HealthCare Utilization Project Nationwide Emergency Department Sample. Total and annual percentage changes in the proportion of pelvic inflammatory disease emergency department visits were estimated using trend analyses. Results While the number of emergency department visits among females aged 15–44 years during 2006–2013 increased (6.5 million to 7.4 million), the percentage of visits due to pelvic inflammatory disease decreased from 0.57% in 2006 to 0.41% in 2013 (total percentage change, –28.4%; annual percent change, –4.3%; 95% confidence interval, –5.7% to –2.9%). The largest decreases were among those aged 15-19 years (total percent change, –40.6%; annual percentage change, –6.6%; 95% confidence interval, –8.6% to –4.4%) and living in the South (total percentage change, –38.0%; annual percentage change, –6.2%; 95% confidence interval, –7.8% to –4.6%). Females aged 15-19 years who lived in the South had a 47.9% decrease in visits due to pelvic inflammatory disease (annual percentage change, –8.4%, 95% confidence interval, –10.4 to –6.5). Patients living in ZIP codes with the lowest median income ( $64,000, total percent change, –24.4%; annual percent change, –3.8%; 95% confidence interval, –5.2% to –2.4%). The percentage of emergency department visits due to pelvic inflammatory disease was highest among patients not charged for their visit, self-paying, or those covered by Medicaid, with total percentage changes in these 3 groups of –27.8%, –30.7%, and –35.1%, respectively. Patients with Medicaid coverage had the largest decrease in visits with a diagnosis of pelvic inflammatory disease (total percent change, –35.1%; annual percent change, –5.8%; 95% confidence interval, –7.2% to –4.3%). Conclusion Nationally representative data indicate the percentage of emergency department visits with a pelvic inflammatory disease diagnosis decreased during 2006–2013 among females aged 15-44 years, primarily driven by decreased diagnoses of pelvic inflammatory disease among females aged 15–19 years and among women living in the southern United States. Despite declines, a large number of females of reproductive age are receiving care for pelvic inflammatory disease in emergency departments. Patients with lower median income and no or public health insurance status, which may decrease access to and use of health care services, consistently had the highest percentage of emergency department visits due to pelvic inflammatory disease. Future research should focus on obtaining a better understanding of factors influencing trends in pelvic inflammatory disease diagnoses and ways to address the challenges surrounding surveillance for this condition.