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61. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2004
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2004.jsp
    January 01, 2004 - In all data years except 2000, this weight is used to create national estimates for all analyses. … DISCWT10 for all analyses 2000 DISCWT to create nationwide estimates for all analyses … DISCWT10 for all analyses 1988 - 1997 DISCWT_U for all analyses D10CWT_U for … For trends analysis, it is recommended that analyses begin with the 1993 data year. … HCUP Fact Books report aggregate statistics and detailed analyses using HCUP data.

62. AHRQ Slide Template 2019-Regular (pdf file)
    hcup-us.ahrq.gov/news/exhibit_booth/HCUPOverviewDeck_121422.pdf
    February 09, 2022 - years and older adults. 2008, 2010, 2012, 2014, 2016, 2017 NEDS, Stat Brief #263 COVID-19- related analyses … and 8.9 percent of costs for all nonobstetric stays. 2017 SID, Stat Brief #259 Opioid- related analyses … Additional data elements are available: ► Value-added variables (supplemental variables for revisit analyses … Nationwide Databases to Produce National Estimates * The NRD is not designed to support regional analyses … Readmission analyses possible in some States.

63. HCUPnet
    hcup-us.ahrq.gov/news/exhibit_booth/hcupnet_brochure.jsp
    May 01, 2018 - Cost-to-Charge Ratio (CCR) Files Hospital Market Structure (HMS) Files Supplemental Variables for Revisit Analyses … Expand Your Analyses Use HCUP Tools. … HCUPnet incorporates several AHRQ products into its analyses, including the Clinical Classification Software

64. HCUP-US SASD Overview
    hcup-us.ahrq.gov/sasdoverview.jsp
    September 01, 2025 - Cost-to-Charge Ratio (CCR) Files Hospital Market Structure (HMS) Files Supplemental Variables for Revisit Analyses … participating States that are translated into a uniform format to facilitate multistate comparisons and analyses … healthcare services and support healthcare policy research on a variety of topics, including: Analyses

65. Calculating Variances Using the 1999 Nationwide Inpatient Sample (pdf file)
    hcup-us.ahrq.gov/reports/methods/2005-07.pdf
    January 01, 2005 - Several statistical programming packages allow weighted analyses. … Types of Estimands and Statistical Analyses That Can Be Accommodated. … Types of Estimands and Statistical Analyses That Can Be Accommodated. … Types of Estimands and Statistical Analyses That Can Be Accommodated. … Types of Estimands and Statistical Analyses That Can Be Accommodated.

66. HCUP Nationwide Inpatient Sample Design Report 1994
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_1994_Design_Report.jsp
    January 01, 1994 - Thus, the NIS supports both cross-sectional and longitudinal analyses. … Therefore, sample weights were developed separately for hospital- and discharge-level analyses. … All of these discharge weights can be rescaled if necessary for selected analyses, to sum to the NIS … Given that a very large number of observations will be available for most analyses, it may be feasible … Consequently, longitudinal analyses of hospital-level outcomes may be biased if they are based on any

67. HCUP Nationwide Inpatient Sample Design Report 1997
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_1997_Design_Report.jsp
    January 01, 1997 - Therefore, sample weights were developed separately for hospital- and discharge-level analyses. … All of these discharge weights can be rescaled if necessary for selected analyses, to sum to the NIS … Given that a very large number of observations will be available for most analyses, it may be feasible … Return to Contents Longitudinal Analyses As previously shown in Table 0, hospitals that continue … Consequently, longitudinal analyses of hospital-level outcomes may be biased if they are based on any

68. HCUP Nationwide Inpatient Sample Design Report 1995
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_1995_Design_Report.jsp
    January 01, 1995 - Thus, the NIS supports both cross-sectional and longitudinal analyses. … Therefore, sample weights were developed separately for hospital- and discharge-level analyses. … All of these discharge weights can be rescaled if necessary for selected analyses, to sum to the NIS … Given that a very large number of observations will be available for most analyses, it may be feasible … Consequently, longitudinal analyses of hospital-level outcomes may be biased if they are based on any

69. Calculating Variances Using the 1999 Nationwide Inpatient Sample (pdf file)
    hcup-us.ahrq.gov/db/nation/kid/reports/CalculatingKIDVariances.pdf
    December 16, 2005 - Several statistical programming packages allow weighted analyses. … Types of Estimands and Statistical Analyses That Can Be Accommodated. … Types of Estimands and Statistical Analyses That Can Be Accommodated. … Types of Estimands and Statistical Analyses That Can Be Accommodated. … Types of Estimands and Statistical Analyses That Can Be Accommodated.

70. Nationwide Readmissions Database (NRD)
    hcup-us.ahrq.gov/news/exhibit_booth/nrd_brochure.jsp
    May 01, 2017 - Cost-to-Charge Ratio (CCR) Files Hospital Market Structure (HMS) Files Supplemental Variables for Revisit Analyses … The NRD is a unique and powerful database designed to support various types of analyses of national readmission … medical practice Health care cost inflation Quality of care and patient safety Expand Your Analyses

71. Nis 1998 Design Report (pdf file)
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_1998_Design_Report.pdf
    January 01, 1998 - .................................................................................. 16 Longitudinal Analyses … Therefore, sample weights were developed separately for hospital- and discharge-level analyses. … Given that a very large number of observations will be available for most analyses, it may be feasible … Consequently, longitudinal analyses of hospital-level outcomes may be biased if they are based on any … One approach to consider in hospital-level longitudinal analyses is to use repeated-measure models that

72. NIS Database Documentation
    hcup-us.ahrq.gov/db/nation/nis/nisdbdocumentation.jsp
    May 01, 2025 - Its large sample size is ideal for developing national and regional estimates and enables analyses of

73. Microsoft Word - NIS_1999_Design_Report.doc (pdf file)
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_1999_Design_Report.pdf
    January 01, 1999 - .................................................................................. 17 Longitudinal Analyses … Therefore, sample weights were developed separately for hospital- and discharge-level analyses. … Given that a very large number of observations will be available for most analyses, it may be feasible … Consequently, longitudinal analyses of hospital-level outcomes may be biased if they are based on any … One approach to consider in hospital-level longitudinal analyses is to use repeated-measure models that

74. HCUP Nationwide Inpatient Sample Design Report 1998
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_1998_Design_Report.jsp
    January 01, 1998 - Therefore, sample weights were developed separately for hospital- and discharge-level analyses. … Given that a very large number of observations will be available for most analyses, it may be feasible … Longitudinal Analyses Hospitals that continue in the NIS for multiple consecutive years are a subset … Consequently, longitudinal analyses of hospital-level outcomes may be biased if they are based on any … In any case, the analyses may be more efficient (e.g., produce more precise estimates) if they account

75. Overview to the HCUP Nationwide Inpatient Sample (NIS), 2002
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2002.jsp
    January 01, 2002 - In all data years except 2000, this weight is used to create national estimates for all analyses. … In all data years except 2000, this weight is used to create national estimates for all analyses. … In all data years except 2000, this weight is used to create national estimates for all analyses. … DISCWT10 for all analyses 2000 DISCWT to create nationwide estimates for all analyses … DISCWT10 for all analyses 1988 - 1997 DISCWT_U for all analyses D10CWT_U for

76. Overview to the HCUP Nationwide Inpatient Sample (NIS), 2001
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2001.jsp
    January 01, 2001 - In all data years except 2000, this weight is used to create national estimates for all analyses. … In all data years except 2000, this weight is used to create national estimates for all analyses. … In all data years except 2000, this weight is used to create national estimates for all analyses. … DISCWT10 for all analyses 2000 DISCWT to create nationwide estimates for all analyses … DISCWT10 for all analyses 1988 - 1997 DISCWT_U for all analyses D10CWT_U for

77. HCUP Nationwide Inpatient Sample Design Report 1999
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_1999_Design_Report.jsp
    January 01, 1999 - Therefore, sample weights were developed separately for hospital- and discharge-level analyses. … Given that a very large number of observations will be available for most analyses, it may be feasible … Longitudinal Analyses Hospitals that continue in the NIS for multiple consecutive years are a subset … Consequently, longitudinal analyses of hospital-level outcomes may be biased if they are based on any … In any case, the analyses may be more efficient (e.g., produce more precise estimates) if they account

78. Healthcare Cost and Utilization Project (HCUP) NEDS Notes
    hcup-us.ahrq.gov/db/vars/cptn/nedsnote.jsp
    May 01, 2015 - Cost-to-Charge Ratio (CCR) Files Hospital Market Structure (HMS) Files Supplemental Variables for Revisit Analyses … did not consider the quality of the CPT information to be reliable and did not use CPT codes in their analyses … New York used only the ICD-9-CM codes for analyses.

79. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2003
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2003_v7.jsp
    January 01, 2003 - In all data years except 2000, this weight is used to create national estimates for all analyses. … In all data years except 2000, this weight is used to create national estimates for all analyses. … In all data years except 2000, this weight is used to create national estimates for all analyses. … DISCWT10 for all analyses 2000 DISCWT to create nationwide estimates for all analyses … DISCWT10 for all analyses 1988 - 1997 DISCWT_U for all analyses D10CWT_U for

80. Kids' Inpatient Database (KID)
    hcup-us.ahrq.gov/news/exhibit_booth/kid_brochure.jsp
    May 01, 2018 - Cost-to-Charge Ratio (CCR) Files Hospital Market Structure (HMS) Files Supplemental Variables for Revisit Analyses … It also enables analyses of rare conditions, such as congenital anomalies, as well as uncommon treatments … Expand Your Analyses Use HCUP Tools.