-
hcup-us.ahrq.gov/db/nation/nis/2006NIS_INTRODUCTION.pdf
November 01, 2015 - Refer to Table 1 in Appendix III for a list of data elements in the
Inpatient Core File. … The NIS data set includes only the actual (unadjusted)
number of observed discharges. … In some cases, AGE is set to the midpoint of the age category. … the 2006 NIS Inpatient Core files, but are
only available in previous years’ files. … DISCWT10 1998-2004 Discharge weight on 10% subsample
Core file for NIS from 1998 to 2004.
-
hcup-us.ahrq.gov/reports/methods/ComorbiditySoftwareDocumentationFinal.pdf
September 30, 2004 - The input data set must have the following two variables:
1. … (Note: A macro variable
defines this element; it is currently set as 2.) … • Input: SAS inpatient data (CORE) conforming to HCUP coding
conventions (described above), and SAS … • Output: SAS data set (ANALYSIS) containing inpatient records with their
comorbidity indicators … The macro variable (CORE) that defines the input file (SASname) needs to be
defined; change the XXXXXX
-
hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2009.jsp
January 01, 2009 - Refer to Table 1 in Appendix III for a list of data elements in the Inpatient Core File. … For example, the load program for the 2009 NIS Core file is linked to "Core File" under "2009 NIS". … The NIS data set includes only the actual (unadjusted) number of observed discharges. … In some cases, AGE is set to the midpoint of the age category. … in the 2009 NIS Inpatient Core files; but are only available in previous years’ files.
-
hcup-us.ahrq.gov/db/vars/cptn/nedsnote.jsp
May 01, 2015 - Null values are set to blank. … If the HCPCS procedure code is not on the list of valid codes, CPTn is set to invalid. … If the HCPCS procedure code is inconsistent with sex (ECPT02), CPTn is set to inconsistent. … The corresponding CPTCCSn, sex, and age values (prior to 2015) were also set to inconsistent. … Maryland does not provide ICD-9-CM procedure codes on outpatient data, so the CPTn vector is placed on the core
-
hcup-us.ahrq.gov/db/nation/nis/nisdde.jsp
February 01, 2025 - plus;
Core
Core
AGEDAY
Age in days (when AGE is less than 1 year)
1988-2011
Core … ;
Core
Core
DQTR_X
Discharge quarter, as received from data source
2006-2011
Core … Core
FEMALE
Indicator of sex
1998+
Core
Core
H_BEDSZ
Bedsize of … n
1988-1997
Core
RACE
Race/ethnicity of patient
1988+
Core
Core … Core
TRAN_OUT
Transfer out indicator
2010+
Core
Core
YEAR
Calendar
-
hcup-us.ahrq.gov/db/nation/nis/NIS_2008_INTRODUCTION.pdf
January 01, 2008 - Data Elements in the NIS Inpatient Core Files ................................................... 1 … Refer to Table 1 in Appendix III for a list of data elements in the Inpatient Core
File. … In some cases, AGE is set to the midpoint of the age category. … the 2008 NIS Inpatient Core files, but are
only available in previous years’ files. … DISCWT10 1998-2004 Discharge weight on 10% subsample
Core file for NIS from 1998 to 2004.
-
hcup-us.ahrq.gov/db/nation/nis/NIS_2007_INTRODUCTION.pdf
January 01, 2007 - Data Elements in the NIS Inpatient Core Files ................................................... 1 … Refer to Table 1 in Appendix III for a list of data elements in the
Inpatient Core File. … Information from these severity files is to
be used in conjunction with the Inpatient Core files. … In some cases, AGE is set to the midpoint of the age category. … the 2007 NIS Inpatient Core files, but are
only available in previous years’ files.
-
hcup-us.ahrq.gov/db/nation/nis/NISIntroduction2010.pdf
November 01, 2015 - Refer to Table 1 in Appendix III for a list of data elements in the Inpatient Core
File. … For example, the load program for the 2010 NIS Core file is linked to “Core
File” under “2010 NIS”. … The NIS data set includes only the actual (unadjusted)
number of observed discharges. … In some cases, AGE is set to the midpoint of the age category. … the 2010 NIS Inpatient Core files, but are
only available in previous years’ files.
-
hcup-us.ahrq.gov/HCUP_Overview/HCUP_Overview/index508.jsp
September 01, 2025 - The SID contain a core set of clinical and nonclinical information on all patients, regardless of payer … In addition to the core set of uniform data elements common to all SID, some include other elements, … Core Variables
The SASD contain a core set of data elements including: age, sex, diagnoses, hospital … Core Variables The SID, SASD, and SEDD contain a core set of clinical and nonclinical information on … They contain a core set of clinical and non-clinical information on all patients, regardless of payer
-
hcup-us.ahrq.gov/db/nation/nis/nistrends2.jsp
January 01, 2018 - The NIS Supplemental Discharge-Level files are designed to be merged with the NIS Core files to produce … a dataset containing the complete set of variables from both sources. … Stata, and an example SAS program to merge the NIS Supplemental Discharge-Level Files with the NIS Core … The DVD does not include the NIS Core files, which must be obtained separately from the HCUP Central
-
hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2011.pdf
January 01, 2011 - Refer to Table 1 in Appendix III for a list of data elements in the Inpatient Core
File. … For example, the load program for the 2011 NIS Core file is linked to “Core
File” under “2011 NIS”. … In some cases, AGE is set to the midpoint of the age category. … the 2011 NIS Inpatient Core files, but are
only available in previous years’ files. … DISCWT10 1998-2004 Discharge weight on 10% subsample
Core file for NIS from 1998 to 2004.
-
hcup-us.ahrq.gov/db/nation/kid/kid_2003_introduction_rpt.jsp
January 01, 2003 - KID Data Sources, Hospitals, and Inpatient Stays
State-Specific Restrictions
Contents of CD-ROM Set … Data Elements in the KID Inpatient Core File
Table 4. … states
2003
36 states
On CD-ROM,
in ASCII format
1 year of data in a 2-CD set … Contents of CD-ROM Set
There are two types of files included in the KID: 1) data files and 2) documentation … (PDF files)
/File Specifications
Includes data set name, number of records, record length, and
-
hcup-us.ahrq.gov/db/state/2016HCUPStateDatabases09182019.pdf
September 18, 2019 - databases include two discharge-level files and
one hospital-level file:
• Discharge-level Files
o Core … 2017
I10_ECauseCCSna CCS: External cause of
morbidity codes n Core 2016
I10_ECauseMCCS1a Multi-level … CCS: External cause
of morbidity codes 1 DX_PR_GRPS 2016
I10_HOSPBRTH Hospital birth indicator Core … Core 2016
I10_ORPROCc Major operating room
procedure indicator Core 2016
I10_PCLASSna Procedure … 1 DX_PR_GRPS 2016
I10_ SERVICELINEd Service line Core 2016
a Data elements derived from AHRQ
-
hcup-us.ahrq.gov/db/nation/nis/NIS_2009_INTRODUCTION.pdf
January 01, 2009 - Refer to Table 1 in Appendix III for a list of data elements in the Inpatient Core
File. … For example, the load program for the 2009 NIS Core file is linked to “Core
File” under “2009 NIS”. … In some cases, AGE is set to the midpoint of the age category. … the 2009 NIS Inpatient Core files, but are
only available in previous years’ files. … DISCWT10 1998-2004 Discharge weight on 10% subsample
Core file for NIS from 1998 to 2004.
-
hcup-us.ahrq.gov/reports/methods/2007_02.pdf
January 01, 2007 - analyses, which are used to
better understand the relationship between a dependent variable and a set … However, using admission dates to measure
time raises another set of problems because the KID is a discharge … Yes -- -- ADAYWK
AGE Core Age in years at admission coded 0-124 years Yes Yes Yes AGE
AGEDAY Core … (1) died during hospitalization
Yes Yes Yes DIED
DISCWT Core,
Hospital
Discharge weight on Core … Core Synthetic attending physician number in 1997 and 2000 KID Yes Yes -- MDID_S
MDNUM1_R Core Re-identified
-
hcup-us.ahrq.gov/reports/methods/2016-08.pdf
January 01, 2016 - o The ICD-9-CM coding system does not have a comparable set of E/M codes. … They contain a core set of clinical and nonclinical information on all
patients regardless of payer, … The SEDD Core file includes all HCPCS/CPT codes for at least 99
percent of the records. … File
ICD-9-CM Codes per Record
in the SEDD Core File Charge Detail
File Availableb Mean Maximum … For these States, the number of HCPCS/CPT codes available in the Core file is set to retain
at least
-
hcup-us.ahrq.gov/db/nation/nis/corrections_2011.jsp
January 01, 2011 - Nationwide Inpatient Sample 2011 Please refer to the information below for corrections to the NIS data set … This error would prevent the Inpatient Core File (NIS_2011_Core) from being correctly merged with the
-
hcup-us.ahrq.gov/db/nation/kid/Availability_of_KID_Data_Elements_2012.pdf
January 01, 2012 - Elements
HCUP Data Element File(s) Coding Notes 1997 2000 2003 2006 2009 2012 HCUP Data Element
ADAYWK Core … Yes -- -- -- -- -- ADAYWK
AGE Core Age in years at admission coded 0-20 years (0-18 years for 1997) … Yes Yes Yes Yes Yes Yes AGE
AGEDAY Core Age in days is coded 0-365 only when the age in years is
less … Discharge weight on Core file and Hospital Weights file for KID beginning in
2000. … , Hospital Discharge weight on Core file and Hospital Weights file for 1997 KID.
-
hcup-us.ahrq.gov/db/nation/nis/DataElements_NIS_2004_Hospital.pdf
January 01, 2004 - To produce national
estimates, use DISCWT to weight discharges in the Core file to the discharges from … Beginning in the 1998 NIS, this data element is not included in the data set. … Beginning in the 1998 NIS, this data element is not included in the
data set. … Beginning with the 2004 data, this designation was determined by the Core
Based Statistical Area (CBSA … Beginning with the 2004 data, this
designation was determined by the Core Based Statistical Area (CBSA
-
hcup-us.ahrq.gov/db/nation/kid/Availability_of_KID_Data_Elements_2009.pdf
January 01, 2009 - HCUP Data Element File(s) Coding Notes 1997 2000 2003 2006 2009 HCUP Data Element
ADAYWK Core Admission … Yes -- -- -- -- ADAYWK
AGE Core Age in years at admission coded 0-124 years Yes Yes Yes Yes Yes AGE … Discharge weight on Core file and Hospital Weights file for KID
beginning in 2000. … , Hospital Discharge weight on Core file and Hospital Weights file for 1997 KID. … Yes Yes Yes Yes LOS_X
MDC Core MDC in use on discharge date Yes Yes Yes Yes Yes MDC
MDC_NoPOA Core MDC