Cooke, Colin R <br/><br/>
The validity of using ICD-9 codes and pharmacy records to identify patients with chronic obstructive pulmonary disease.  [electronic resource] 

 -  BMC health services research  Feb 2011 
 - 37 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Validation Study 
<br/><br/><label>ISSN: </label>1472-6963 
<br/><br/><label>Standard No.: </label>10.1186/1472-6963-11-37  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aged<br/>Female<br/>Humans<br/>International Classification of Diseases<br/>Logistic Models<br/>Male<br/>Medical Records<br/>Middle Aged<br/>Pharmacies--statistics & numerical data<br/>Pulmonary Disease, Chronic Obstructive--diagnosis<br/>United States--epidemiology<br/>United States Department of Veterans Affairs