The following SAS statements run in a SAS data step and identify which NHAMCS emergency department records were injuries based on the NCHS Injury Team’s definition of injury (See Recommended definition of initial injury visits to emergency departments for use with the NHAMCS-ED data, available on the injury website, for more information.) The injury indicator field is called INJSPB. Records with "INJSPB=1" are injury records. In 2005, the way in which this field was derived changed due to a change in fields on the record. The data prior to 2001 do not include a variable to determine whether the visit was an initial one or not. Definition of an injury record beginning in 2001 includes initial visit status.
/*CAUSE1 and DIAG1 are variable names used in our SAS input
statement.
CAUSE1 is the variable for "Cause of injury #1"
DIAG1 is the variable for "Physician's diagnosis #1"
INITVIS is an imputed variable to indicate initial visit for problem
INITVIS=1 indicates initial visit*/
/*CAUSE1 and DIAG1 are variable names used in our SAS input
statement.
CAUSE1 is the variable for "Cause of injury #1"
DIAG1 is the variable for "Physician's diagnosis #1"
EPISODE is the variable for "Episode of care"
EPISODE=1 indicates initial visit */
/*CAUSE1 and DIAG1 are variable names used in our SAS input statement.
CAUSE1 is the variable for "Cause of injury #1"
DIAG1 is the variable for "Physician's diagnosis #1"
Variable "Episode" not available prior to 2001*/
Special Projects Branch
Office of Analysis and Epidemiology
NCHS, Centers for Disease Control and Prevention
Mailstop P08
nchsinjury@cdc.gov
National Center for Health
Statistics
3311 Toledo Road
Hyattsville, MD 20782
Phone: 1-800-232-4636
nchsquery@cdc.gov
Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30333, U.S.A
Tel: (404) 639-3311 / Public Inquiries: (404) 639-3534 / (800) 311-3435