Public Use Data File Updates
This page contains a list of updates that have been made to the NAMCS and
NHAMCS public-use micro-data files and programming code (SAS, Stata, and
SPSS) since their initial release dates. Data users can check here for the
revisions that have been made and to ensure that they are using the most
accurate version of the files.
2004
NHAMCS Emergency Department File
8/4/06
- A slightly revised version of the 2004 NHAMCS Emergency Department file
was uploaded to the ftp server. This file incorporates modifications to the
edit process for the internal variables used to calculate WAITTIME (waiting
time to see a physician) and LOV (length of visit). The revised WAITTIME and
LOV are only minimally different than the first release, but have been made
available in the interest of consistency with NCHS reports, the revised edit
procedures, and future years of data which use those procedures.
2003 NAMCS
File - Stata documentation
10/18/05 - A new namcs03.dct file was added to the Stata documentation for
the 2003 NAMCS public use file on 10/18/2005. The new file corrects some
problems that were found with the Stata definitions for AGEDAYS, PATCODE,
and TIMEMD. If you have used these variables with an earlier version of the
.dct file, please note that item values greater than 100 may have been
dropped in your output. We apologize for the inconvenience.
2002 NHAMCS Emergency Department File
12/10/04 - We made revisions to two data items on the NHAMCS-Emergency
Department public use file for 2002. These are ADRG2CL1 (1st NDC class for
2nd drug causing an adverse drug event) and DRG3ING5 (5th ingredient for 3rd
medication provided or prescribed). Revisions were also made to one item on
the NHAMCS-Outpatient Department file, EXAMWI2 (2nd write-in examination).
2002 NAMCS
File (affects some SUDAAN users only)
9/29/04 - The 2002 NAMCS public use file was modified slightly to resolve a
problem found when running SUDAAN version 8.0.2 and higher. This problem
only appears when using the WOR (without replacement) design option with
multi-level design variables and may cause the program to abort. For those
using the SUDAAN WR (with replacement) option or other analytic software
packages using an ultimate cluster model for variance estimation (for
example, SAS, Stata, and SPSS), there should be no problem using the
original version of the 2002 NAMCS public use file, so you do not need to
replace your file with this new release.
This page last reviewed
January 11, 2007
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