Impact of a Plan of Care Protocol on Patient Outcomes in People Who Inject Drugs With Infective Endocarditis.

ABSTRACT

BACKGROUND: People who inject drugs (PWID) are at increased risk of deleterious sequelae due to infective endocarditis (IE). A standardized, hospital-wide drug use-associated infection protocol targeting medication safety, pain management, and limiting external risk factors was implemented at an academic medical center to improve outcomes in PWID with IE. METHODS: A quasi-experimental study included patients with active injection drug use and definite IE from January 2013 to July 2017 (preintervention group) and from September 2017 to January 2019 (intervention group). The primary outcome of interest was the 90-day all-cause readmission rate. Secondary outcomes included infection-related readmission rates, in-hospital and all-cause mortality rates, and the frequency of patients leaving against medical advice. RESULTS: A total of 168 patients were included, in the 100 preintervention and 68 in the intervention group. Patients in the intervention group had reduced odds of 90-day all-cause readmission (adjusted odds ratio, 0.2; 95% confidence interval, 0.08-0.6) after adjustment for confounding variables. The 12-month all-cause mortality rate was also significantly reduced in the intervention group (adjusted odds ratio, 0.25; 95% confidence interval, .07-.89). The intervention group had a higher proportion of patients leaving against medical advice (6% for the preintervention group vs 35% for the intervention group, P < .001). CONCLUSIONS: A drug use-associated infection protocol demonstrated reduced 90-day all-cause readmission and 12-month all-cause mortality rates in PWID with IE. This study highlights the importance of standardized care processes for improving care in this specialized patient population.