REAL-WORLD OBSERVATIONAL STUDY OF ASSOCIATION BETWEEN STATIN MEDICATIONS AND COPD-SPECIFIC OUTCOMES
Author(s)
Ajmera MR1, Sambamoorthi U2, Rust G3, Pan X4, Tworek C2, Metzger A2
1RTI Health Solutions, RTP, NC, USA, 2West Virginia University, Morgantown, WV, USA, 3Morehouse School of Medicine, Atlanta, GA, USA, 4Evidera LLC, Lexington, MA, USA
OBJECTIVES: Disease modifying drugs are not yet available for the management of individuals with Chronic Obstructive Pulmonary Disease (COPD). Statin therapy, due to its anti-inflammatory properties is under consideration for the management of COPD. This study examined the relationship between statin therapy and COPD-specific outcomes. METHODS: Retrospective longitudinal dynamic cohort design using Medicaid claims data from multiple years (2005-2008) was utilized. Statin therapy was identified from the prescription drug file using the National Drug Codes (NDC). COPD-specific outcomes such as hospitalizations, emergency room and outpatient visits were identified based on a primary diagnosis of COPD. Multivariable logistic regressions with Inverse Probability Treatment Weights (IPTW) were used to examine the relationship between statin therapy and COPD-specific outcomes. The relationship between multimorbidity, statin medications and COPD-specific outcomes was tested using an interaction term. Secondary analyses with duration of stain therapy were also conducted. All analyses will be conducted using SAS version 9.3. RESULTS: The study included 19,060 Medicaid beneficiaries with newly-diagnosed COPD, out of whom 30.3% beneficiaries received statins during the 1-year baseline period. Compared to adults without statin therapy, those with statin therapy had significantly lower rates of COPD-specific hospitalizations (4.7% vs. 5.2%; p<0.05), emergency room visits (13.4% vs. 15.4%; p<0.001) and outpatient visits (41.4% vs. 44.7%; p<0.001). Even after adjusting for observed selection bias with IPTW technique, adults with statin therapy were less likely to have COPD-specific hospitalizations (AOR: 0.76; 95% CI: 0.66, 0.87), emergency room visits (AOR: 0.81; 95% CI: 0.75, 0.89) and outpatient visits (AOR: 0.86; 95% CI: 0.80, 0.91) compared to those without statin therapy. Adults with multimorbidity and statin therapy were less likely to have COPD-specific outcomes. CONCLUSIONS: Statin therapy was associated with reduction in COPD-specific outcomes. These findings may suggest beneficial effects of statin among newly diagnosed COPD patients and warrant further clinical trial investigation.
Conference/Value in Health Info
2015-05, ISPOR 2015, Philadelphia, PA, USA
Value in Health, Vol. 18, No. 3 (May 2015)
Code
PRS8
Topic
Clinical Outcomes, Epidemiology & Public Health
Topic Subcategory
Comparative Effectiveness or Efficacy, Safety & Pharmacoepidemiology
Disease
Respiratory-Related Disorders