Chronic obstructive pulmonary disease (COPD) affects between 11 and 24 million people in the U.S. and is the third leading cause of death in this country.1,2 Airflow obstruction on spirometry in addition to respiratory symptoms is required to establish a diagnosis of COPD.3,4 As many as 40% of patients with a clinical diagnosis of COPD have not had spirometry or have spirometry results inconsistent with the diagnosis of COPD.5,6 In addition to recommended spirometry, many patients with COPD do not receive other evidence-based therapies.7,8
About 50% of patients in the Minneapolis VA Health Care System (MVAHCS) receive care in its rural community-based outreach clinics (CBOCs). Data regarding the quality of general medical care between rural and urban populations are sparse; however, studies suggest that the quality of care delivered in rural clinics may be lower than the care provided in an urban setting.9-12 Care for patients with COPD in an urban setting is suboptimal with only 58% of patients receiving guideline-based care, and there are no comparative data for penetrance in the rural setting.8 Most published studies on patients with COPD treated in rural vs urban locations are outcomes studies that queried statewide or national registry data evaluating the frequency of emergency department (ED) visits or hospital admissions for COPD exacerbations, all-cause mortality, or COPD exacerbation-related mortality.13-18 There are no studies examining potential differences in the quality of health care received by patients with COPD in rural vs urban locations or whether these potential differences are associated with changes in health care utilization.
The authors sought to determine whether patients with the diagnosis of COPD treated in the MVAHCS and its 13 CBOCs receive similar quality of disease-related health care in rural vs urban primary care clinic locations. The authors hypothesized that patients who receive their primary care in rural clinics would be less likely to have had spirometry or to receive respiratory immunizations and short- or long-acting inhalers and that discrepancies would be associated with increased health care utilization in rural areas as measured by prescriptions for systemic corticosteroids, antibiotics, ED visits, or hospital admissions for COPD exacerbations.
Methods
The MVAHCS has 14 primary care locations; these locations were designated as rural or urban based on the Rural-Urban Commuting Area codes.19,20 There were 4 urban locations and 10 rural clinics; all rural clinics were farther than 40 miles from the main Minneapolis VAMC.
Patient Selection
The authors performed a retrospective chart review after receiving an institutional review board waiver for this quality assessment study. All patients who had a prior ICD-9 encounter diagnosis of COPD (codes: 491.0, 491.1, 491.2, 491.20, 491.21, 491.22, 491.8, 491.9, 492.0, 492.8, 494, 494.0, 494.1, 496) and who were seen in primary care during March 2015 were identified. Each subject’s first visit during that month was used as the start of the retrospective 1-year look-back period. All eligible subjects were sorted based on their rural or urban location and a randomly assigned number. Patients were then selected according to ascending numbers from each rural and urban clinic in proportion to the clinic’s representation among all eligible patients.
Outcomes
The primary outcomes—possible discrepancies in quality of health care for patients with COPD in rural vs urban primary care clinics—were assessed by (1) prior spirometry; (2) any prior pneumonia vaccination; (3) an influenza vaccination within the past year; (4) prescriptions within the past year for a short-acting beta agonist (SABA) metered-dose inhaler; and (5) prescriptions for a long-acting inhalers, including long-acting beta agonists (LABAs), long-acting muscarinic antagonists (LAMAs), or inhaled corticosteroids (ICSs).
Secondary outcomes included (1) an active prescription for home oxygen within the past calendar year; (2) health care utilization assessed via prescriptions for intermittent courses of oral corticosteroids; (3) prescriptions for respiratory antibiotics (macrolides, tetracyclines, fluoroquinolones) within the past year for COPD exacerbations; (4) ED visits; (5) hospital admissions (and need for mechanical ventilation) for COPD exacerbations within the past year; and (6) whether patients were seen by either VA or Non-VA pulmonology providers.
Data Collection
Patients’ demographic data and comorbidities were collected via chart review. A 1-year prescription medication list was obtained by an electronic database search of the MVAHCS electronic medical record (EMR). Additional antibiotics and corticosteroid prescriptions for COPD exacerbations paid for by the VA but filled at a local pharmacy were manually searched from a separate database to supplement the electronic prescription list. Comparison of the electronic prescription list and pharmacy records in 25% of patients found 100% concordance in the prescription lists. The investigator manually reviewed and extracted the following data from the EMR, scanned-in records, and a Midwest VA COPD registry database: most recent spirometry results; immunization status for influenza in the past year; prior pneumonia vaccination; home oxygen prescription; whether the patient received respiratory antibiotic or intermittent oral corticosteroid treatment for COPD exacerbations; whether the patient had a ED visit or hospital admission for COPD exacerbation with or without need for mechanical ventilation; and whether the patient had been seen by a pulmonology provider. The investigator reviewed all primary care provider notes in the past year for documentation of non-VA ED visits or hospitalizations that were not present in the EMR, Midwest VA COPD registry database, or scanned patient records.