JSM 2011 Online Program

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Abstract Details

Activity Number: 362
Type: Contributed
Date/Time: Tuesday, August 2, 2011 : 10:30 AM to 12:20 PM
Sponsor: Section on Government Statistics
Abstract - #301007
Title: Obtaining Missing Race for Chronic Kidney Disease (CKD) Patients Using Multiple Department of Veterans Affairs (VA) Administrative Databases
Author(s): Nancy J. Petersen*+ and Hong Jen Yu+ and G. John Chen
Companies: Department of Veterans Affairs and Department of Veterans Affairs
Address: Houston HSR&D Center of Excellence, Houston, TX, , Houston HSR&D Center of Excellence, Houston, TX, 77030,
Keywords: Administrative databases ; race ; data quality

Background: A large proportion of Veterans who receive care in VA have missing race information if race is determined using a single clinical data source. VA administrative databases include inpatient, outpatient, pharmacy, lab and cost data. Race is included in some databases but it may be missing for many patients. For a study examining racial differences in services in CKD patients derived from a lab dataset that did not contain race, we obtained race using inpatient and outpatient files. Methods: We determined the percent of patients with missing values for race in the inpatient and outpatient datasets from fiscal years (FYs) 1997-2010. We used an algorithm to look at all years simultaneously to extract any values of race that might be in the files. Results: The percent missing race ranged from 42.8% in FY97 to 20.8% in FY10 for outpatient files and 2.9% to 56.0% for inpatient files. After combining files across all years, we obtained race on 84.5% of the 1.2 million CKD patients. Conclusions: Examining multiple years simultaneously allowed us to obtain race for a high percent of our study patients that would have been missing if we used a single clinical database.

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