Objectives:
To examine the relationship between community acquired pneumonia (CAP) and proton pump inhibitor (PPI) treatment in laryngeal/voice disordered patients.
Study Design:
Retrospective cohort analysis.
Setting:
Large, national administrative U.S. claims database.
Subjects and Methods:
Patients ≥ 18 years of age with outpatient treatment for a laryngeal/voice disorder per ICD-9-CM codes from January 1, 2010 to December 31, 2014 with 12 months continuous enrollment prior to the index date (first laryngeal/voice disorder diagnosis), no pre-index diagnosis of CAP, and had prescription claims captured from 1 year pre-index to end of follow-up were included. Patient demographics, comorbid conditions, index laryngeal diagnosis, number of unique pre-index patient encounters, and CAP diagnoses during 3 year post-index date were collected. Two models, a time-dependent Cox regression model and a propensity score based approach with marginal structural model, were each separately performed in patients with and without pre-index date PPI prescriptions.
Results:
392,355 unique patients met inclusion criteria. 188,128 (47.9%) patients had a PPI prescription. The 3 year absolute risk for CAP was 4.0% and 5.3% in patients without and with pre-index PPI use, respectively. The CAP occurrence for a person who already received a PPI is 30% to 50% higher than for a person who has not yet had a PPI but may receive one later for patients without and with pre-index date PPI use, respectively.
Conclusions:
Patients without and with pre-index date PPI use experienced roughly 30% to 50% increased likelihood of CAP, respectively, compared to patients who had not had PPI prescriptions.