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hcup-us.ahrq.gov/reports/methods/MS2021-02-HospDist-DataSuppl.xlsx
December 03, 2021 - Methods for Calculating Patient Travel Distance to Hospital in HCUP Data – Data Supplements
Supplement 1
Supplement 1. Distribution of difference (in miles) between geocode methods, by patient region, division, and urban/rural location, 2018
Location geocode comparison Census region Census division Urban/rural locat…
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hcup-us.ahrq.gov/nisoverview.jsp
February 01, 2025 - HCUP-US NIS Overview
An official website of the Department of Health & Human Services
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FAQs
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hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_1999.jsp
January 01, 1999 - death: (0) did not die during hospitalization, (1) died during hospitalization
DISCWT
Discharge weight … (on Core file and Hospital Weights file)
DISCWT10
Discharge weight (on 10% subsample file) … identifier that matches AHA Annual Survey of Hospitals (not available for all states)
DISCWT
Weight … for all states)
HOSPST
state postal code for hospital (e.g., AZ for Arizona)
HOSPWT
Weight
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hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2000_Supplemental.TXT
January 01, 2000 - Data element label
NIS 2000 Supplemental 1 TRENDWT 1 11 7 Num Trend weight … Quartiles for Patient's ZIP Code
NIS 2000 Supplemental 25 TRENDWTcharge 82 92 7 Num Weight
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hcup-us.ahrq.gov/db/nation/nis/tools/pgms/SPSSload_NIS_2000_Supplemental.SPS
January 01, 2000 - VARIABLE LABELS
TRENDWT "Trend weight to discharges in the universe"
NDX … "Median Household Income Quartiles for Patient's ZIP Code"
TRENDWTcharge "Weight
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hcup-us.ahrq.gov/db/nation/nrd/Introduction_NRD_2010-2016.pdf
January 01, 2016 - Within each stratum, s, each NRD inpatient admission received a weight:
DISCWTi,j = Ns(universe) … Therefore, each
discharge's weight (DISCWTi,j) is equal to the number of inpatient discharges it represents … age distribution of the SID discharges, we collapsed some strata in
the target universe prior to the weight … Calculating Nationally Weighted Estimates
An analyst using the NRD must use the discharge-level weight … Use
LOS Length of stay, edited
TOTCHG Total charges, edited
Weighting
DISCWT NRD discharge weight
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hcup-us.ahrq.gov/datainnovations/clinicalcontentenhancementtoolkit/hi8.jsp
August 07, 2014 - HL7 Integration Engine Vendor Evaluation Template.
An official website of the Department of Health & Human Services
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hcup-us.ahrq.gov/reports/methods/2008_06.pdf
January 01, 2008 - (A.1)
wi and xi, respectively, are the discharge weight … wg,i = Disparities analysis file discharge weight for observation i in cell g. … The only difference
was that the weight for patient i in cell g was redefined to account for the weighting … for direct
standardization and the discharge weight as:
ig
obsg
stdg
ig wN
N
w ,
,
,*
, ⋅= … wg,i = Disparities analysis file discharge weight for observation i in cell g.
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hcup-us.ahrq.gov/db/nation/nrd/Introduction_NRD_2010-2016.jsp
January 01, 2016 - Within each stratum, s , each NRD inpatient admission received a weight:
DISCWT i,j = Ns(universe … Therefore, each discharge's weight (DISCWT i,j ) is equal to the number of inpatient discharges it represents … age distribution of the SID discharges, we collapsed some strata in the target universe prior to the weight … Calculating Nationally Weighted Estimates
An analyst using the NRD must use the discharge-level weight … Length of stay, edited
TOTCHG
Total charges, edited
Weighting
DISCWT
NRD discharge weight
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hcup-us.ahrq.gov/db/nation/nrd/Introduction_NRD_2010-2017.jsp
January 01, 2017 - Within each stratum, s , each NRD inpatient admission received a weight:
DISCWT i,j = Ns(universe … Therefore, each discharge's weight (DISCWT i,j ) is equal to the number of inpatient discharges it represents … age distribution of the SID discharges, we collapsed some strata in the target universe prior to the weight … Calculating Nationally Weighted Estimates
An analyst using the NRD must use the discharge-level weight … Length of stay, edited
TOTCHG
Total charges, edited
Weighting
DISCWT
NRD discharge weight
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hcup-us.ahrq.gov/db/nation/nrd/NRD_Introduction_2010-2014.jsp
January 01, 2014 - Within each stratum, s, each NRD inpatient admission received a weight:
DISCWT i,j = Ns(universe) … age distribution of the SID discharges, we collapsed some strata in the target universe prior to the weight … Calculating Nationally Weighted Estimates
An analyst using the NRD must use the discharge-level weight … Length of stay, edited
TOTCHG
Total charges, edited
Weighting
DISCWT
NRD discharge weight … (1) comorbidity present, (0) comorbidity not present
CM_WGHTLOSS
AHRQ comorbidity measure - Weight
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hcup-us.ahrq.gov/db/nation/nrd/Introduction_NRD_2010-2017.pdf
January 01, 2017 - Within each stratum, s, each NRD inpatient admission received a weight:
DISCWTi,j = Ns(universe) … Therefore, each
discharge's weight (DISCWTi,j) is equal to the number of inpatient discharges it represents … age distribution of the SID discharges, we collapsed some strata in
the target universe prior to the weight … Calculating Nationally Weighted Estimates
An analyst using the NRD must use the discharge-level weight … Use
LOS Length of stay, edited
TOTCHG Total charges, edited
Weighting
DISCWT
NRD discharge weight
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hcup-us.ahrq.gov/db/nation/nis/tools/stats/1995README.TXT
April 01, 1995 - HCUP-3 Nationwide Inpatient Sample (NIS)
Release 4, 1995
Record Layout Information
This sub-directory contains electronic copies of the record layouts for the
following files:
- Inpatient Stay Core Files
RECL_A -- record layout for File …
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hcup-us.ahrq.gov/db/nation/nis/tools/stats/1996README.TXT
May 01, 1996 - HCUP-3 Nationwide Inpatient Sample (NIS)
Release 5, 1996
Record Layout Information
This sub-directory contains electronic copies of the record layouts for the
following files:
- Inpatient Stay Core Files
RECL_A -- record layout for File A…
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hcup-us.ahrq.gov/db/nation/nis/tools/stats/1997README.TXT
June 01, 1997 - HCUP Nationwide Inpatient Sample (NIS)
Release 6, 1997
Record Layout Information
This sub-directory contains electronic copies of the record layouts for the
following files:
- Inpatient Stay Core Files
RECL_A -- record layout for File A
…
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hcup-us.ahrq.gov/db/nation/nis/tools/stats/1994README.TXT
March 01, 1994 - HCUP-3 Nationwide Inpatient Sample (NIS)
Release 3, 1994
Record Layout Information
This sub-directory contains electronic copies of the record layouts for the
following files:
- Inpatient Stay Core Files
RECL_A -- record layout for File …
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hcup-us.ahrq.gov/db/nation/nrd/Introduction_NRD_2010-2015.pdf
January 01, 2015 - Within each stratum, s, each NRD inpatient admission received a weight:
DISCWTi,j = Ns(universe) … Therefore, each
discharge's weight (DISCWTi,j) is equal to the number of inpatient discharges it represents … age distribution of the SID discharges, we collapsed some strata in
the target universe prior to the weight … Calculating Nationally Weighted Estimates
An analyst using the NRD must use the discharge-level weight … D-6 NRD Introduction
Category Data Element Name Description
Weighting
DISCWT NRD discharge weight
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hcup-us.ahrq.gov/db/ccr/ip-ccr/CCR-KID-UserGuide-2003-2016.pdf
January 01, 2016 - state, urban/rural, investor-owned/other, and
bedsize), using the proportion of group beds as the weight
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hcup-us.ahrq.gov/db/nation/nis/HCUPNISChecklist_PDFVersion.pdf
November 28, 2017 - Microsoft Word - HCUP NIS Checklist_PDF Version.docx
HCUP (11/28/17) 1
Checklist for Working With the NIS
The National (Nationwide) Inpatient Sample (NIS) is part of a family of databases and software tools developed for the Healthcare Cost and
Utilization Project (HCUP).
The number of studies using the…
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hcup-us.ahrq.gov/db/nation/nrd/Introduction_NRD_2010-2015.jsp
January 01, 2015 - Within each stratum, s , each NRD inpatient admission received a weight:
DISCWT i,j = Ns(universe … age distribution of the SID discharges, we collapsed some strata in the target universe prior to the weight … Calculating Nationally Weighted Estimates
An analyst using the NRD must use the discharge-level weight … Length of stay, edited
TOTCHG
Total charges, edited
Weighting
DISCWT
NRD discharge weight … (1) comorbidity present, (0) comorbidity not present
CM_WGHTLOSS
AHRQ comorbidity measure - Weight