“…Patients had to have either a validated NCIS or TIA between January 1, 2001, and December, 31,2009. Patients age 18 years or older with at least 1 inpatient stay or outpatient medical office visit with an International Classification of Diseases, Ninth Revision (ICD-9) diagnostic code between 430.xx and 438. xx and/or status code V12.54 (Personal History of Stroke) in the primary or secondary position recorded between January 1, 2001, and December 31, 2009, were identified administratively from inpatient hospital claims and outpatient visit records.…”