Chest
Original ResearchBronchiectasisTrends in Bronchiectasis Among Medicare Beneficiaries in the United States, 2000 to 2007
Section snippets
Databases and Populations
We analyzed a 5% sample of the carrier and the denominator standard analytic files (SAFs) obtained from CMS. The 5% sample was randomly selected from all carrier claims by CMS. The carrier SAFs contain claims-level information from noninstitutional outpatient health-care providers. The denominator SAFs include annual demographic and enrollment information for each Medicare beneficiary (e-Appendix 1).
Data Analysis and Ethical Review
We analyzed claims from 2000 to 2007 to estimate prevalence and trends of bronchiectasis and to
Results
The study population included > 2 million unique individuals enrolled in Medicare Part B for at least 1 month from 2000 through 2007. Medicare beneficiaries from all 50 states and the District of Columbia were represented. The demographic distribution was representative of the entire US population aged ≥ 65 years.
We identified 117,112 claims of bronchiectasis from 2000 to 2007 from 22,296 people for an average of approximately five claims per person during this period. These individuals
Discussion
We analyzed CMS databases to describe nationally representative patterns of prevalence and trends of bronchiectasis in the older adult US outpatient population. Based on the number of cases identified in this analysis and extrapolating to the 2007 US population aged ≥ 65 years, we estimate that > 190,000 unique cases of bronchiectasis were assessed by a physician in the older adult US population in that year. Bronchiectasis prevalence increased significantly from 2000 to 2007 among both men and
Conclusions
We observed an increasing prevalence of bronchiectasis in the outpatient Medicare population and an overall higher prevalence for women and Asians. The increased prevalence among Asians was observed at all levels of thoracic CT scan use and was greatest with four to six scans across the 8-year period. This increasing prevalence may be due to increased recognition of previously undiagnosed cases or a true increase in incidence, highlighting the need for increased awareness of this condition.
Acknowledgments
Author contributions: Ms Seitz and Dr Prevots had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis.
Ms Seitz: contributed to the study concept and design; data acquisition and management; statistical and epidemiologic analyses; interpretation of results; drafting of the manuscript; and manuscript preparation, revision, final edit, and approval of the final version.
Dr Olivier: contributed to the study concept
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Funding/Support: This research was supported by the Intramural Research Program of the National Institutes of Health, National Institute of Allergy and Infectious Diseases.