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81. Figure 5: Number of Hospitals Sampled, by Year
    hcup-us.ahrq.gov/figures/nis_figure5_2011.jsp
    January 01, 2011 - Figure 5: Number of Hospitals Sampled, by Year Figure 5: Number of Hospitals Sampled, by Year Years Regular Sample Hospitals Total Sample Hospitals 1988 758 759 1989 875 882 1990 861 871 1991 847 859 1992 838 856 1993 913   1994 …

82. Figure 5: Number of Hospitals Sampled, by Year
    hcup-us.ahrq.gov/figures/nis_figure5_2009.jsp
    January 01, 2009 - Figure 5: Number of Hospitals Sampled, by Year Figure 5: Number of Hospitals Sampled, by Year Years Regular Sample Hospitals Total Sample Hospitals 1988 758 759 1989 875 882 1990 861 871 1991 847 859 1992 838 856 1993 913   1994 …

83. 2004 HCUP Nationwide Inpatient Sample (NIS) Comparison Report
    hcup-us.ahrq.gov/db/nation/nis/reports/2004niscomparisonrpt.jsp
    May 01, 2016 - Both the NIS and NHDS are samples, and statistics derived from them are estimates. … The report cautions that estimates cannot be expected to be identical when two different samples are … These include: Random variation between the two samples Differences in sampling strategies … MAJOR FINDINGS Considering all of these possible reasons for significant differences among the samples … in-hospital mortality rate comparisons may be related to differences in the hospitals included in the two samples

84. Filespecifications Nis 2003 10Pct Sample B
    hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2003_10PCT_SAMPLE_B.TXT
    January 01, 2003 - Data Set Name: NIS_2003_10PCT_SAMPLE_B Number of Observations: 797773 Total Record Length: 505 Total Number of Variables: 126 Columns Description: ======= ============ 1- 3 Database name 5- 8 Discharge year of data 10- 25 File name 27- 29 Variable number 31- 59 Variable name 61- 63 …

85. Filespecifications Nis 2002 10Pct Sample B
    hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2002_10PCT_SAMPLE_B.TXT
    January 01, 2002 - Data Set Name: NIS_2002_10PCT_SAMPLE_B Number of Observations: 785398 Total Record Length: 490 Total Number of Variables: 116 Columns Description: ======= ============ 1- 3 Database name 5- 8 Discharge year of data 10- 25 File name 27- 29 Variable number 31- 49 Variable name 51- 53 …

86. Filespecifications Nis 2004 10Pct Sample B
    hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2004_10PCT_SAMPLE_B.TXT
    January 01, 2004 - Data Set Name: NIS_2004_10PCT_SAMPLE_B Number of Observations: 800457 Total Record Length: 506 Total Number of Variables: 126 Columns Description: ======= ============ 1- 3 Database name 5- 8 Discharge year of data 10- 25 File name 27- 29 Variable number 31- 59 Variable name 61- 63 …

87. Nis 2003 Summarystats 10Pct Sample B (pdf file)
    hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_2003_SummaryStats_10PCT_SAMPLE_B.PDF
    January 01, 2003 - please refer to the section on Description of Data Elements. For more information about the coding of HCUP data elements, please refer to the section on Description of Data Elements. For more information about the coding of HCUP data elements, HCUP Summary Statistics Report: NIS 2003 - 10PCT_SAMPLE_B File 1 Means o…

88. Nis 2002 Summarystats 10Pct Sample B (pdf file)
    hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_2002_SummaryStats_10PCT_SAMPLE_B.PDF
    January 01, 2002 - please refer to the section on Description of Data Elements. For more information about the coding of HCUP data elements, please refer to the section on Description of Data Elements. For more information about the coding of HCUP data elements, HCUP Summary Statistics Report: NIS 2002 - 10PCT_SAMPLE_B File 1 Means o…

89. Nis 2004 Summarystats 10Pct Sample B (pdf file)
    hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_2004_SummaryStats_10PCT_SAMPLE_B.PDF
    January 01, 2004 - please refer to the section on Description of Data Elements. For more information about the coding of HCUP data elements, please refer to the section on Description of Data Elements. For more information about the coding of HCUP data elements, HCUP Summary Statistics Report: NIS 2004 - 10PCT_SAMPLE_B File 1 Means o…

90. Nis 2001 Summarystats 10Pct Sample B (pdf file)
    hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_2001_SummaryStats_10PCT_SAMPLE_B.PDF
    January 01, 2001 - please refer to the section on Description of Data Elements. For more information about the coding of HCUP data elements, please refer to the section on Description of Data Elements. For more information about the coding of HCUP data elements, HCUP Summary Statistics Report: NIS 2001 - 10PCT_SAMPLE_B File 1 Means o…

91. Nis 2000 Summarystats 10Pct Sample B (pdf file)
    hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_2000_SummaryStats_10PCT_SAMPLE_B.PDF
    January 01, 2000 - please refer to the section on Description of Data Elements. For more information about the coding of HCUP data elements, please refer to the section on Description of Data Elements. For more information about the coding of HCUP data elements, HCUP Summary Statistics Report: NIS 2000 - 10PCT_SAMPLE_B File 1 Means o…

92. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2009
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2009.jsp
    January 01, 2009 - However, these NIS samples were not designed to yield a representative sample of hospitals at the State … The two samples could be combined to form a single, generalizable 20% subsample of discharges. … an equal probability of selection for the sample, regardless of whether they appeared in prior NIS samples … This deviates from the procedure used for earlier samples, which maximized the longitudinal component … For a description of zero-weight hospitals in the 1988-1992 samples, refer to the special report: Design

93. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2007
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2007.jsp
    January 01, 2007 - However, these NIS samples were not designed to yield a representative sample of hospitals at the State … The two samples could be combined to form a single, generalizable 20% subsample of discharges. … an equal probability of selection for the sample, regardless of whether they appeared in prior NIS samples … This deviates from the procedure used for earlier samples, which maximized the longitudinal component … For a description of zero-weight hospitals in the 1988-1992 samples, refer to the special report: Design

94. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2008
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2008.jsp
    January 01, 2008 - However, these NIS samples were not designed to yield a representative sample of hospitals at the State … The two samples could be combined to form a single, generalizable 20% subsample of discharges. … an equal probability of selection for the sample, regardless of whether they appeared in prior NIS samples … This deviates from the procedure used for earlier samples, which maximized the longitudinal component … For a description of zero-weight hospitals in the 1988-1992 samples, refer to the special report: Design

95. INTRODUCTION TO THE HCUP NATIONAL INPATIENT SAMPLE (NIS), 2021
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2021.jsp
    January 01, 2021 - Analyses of time trends using the HCUP NIS are recommended from 1993 forward because earlier samples … Analyses of time trends using the HCUP NIS are recommended from 1993 forward because earlier samples

96. INTRODUCTION TO THE HCUP NATIONAL INPATIENT SAMPLE (NIS), 2020
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2020.jsp
    January 01, 2020 - Analyses of time trends using the HCUP NIS are recommended from 1993 forward because earlier samples … Analyses of time trends using the HCUP NIS are recommended from 1993 forward because earlier samples

97. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2010
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2010.jsp
    January 01, 2010 - However, these NIS samples were not designed to yield a representative sample of hospitals at the State … The two samples could be combined to form a single, generalizable 20% subsample of discharges. … an equal probability of selection for the sample, regardless of whether they appeared in prior NIS samples … This deviates from the procedure used for earlier samples, which maximized the longitudinal component … For a description of zero-weight hospitals in the 1988-1992 samples, refer to the special report: Design

98. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2011
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2011.jsp
    January 01, 2011 - However, these NIS samples were not designed to yield a representative sample of hospitals at the State … The two samples could be combined to form a single, generalizable 20% subsample of discharges. … an equal probability of selection for the sample, regardless of whether they appeared in prior NIS samples … This deviates from the procedure used for earlier samples, which maximized the longitudinal component … For a description of zero-weight hospitals in the 1988-1992 samples, refer to the special report: Design

99. INTRODUCTION TO THE HCUP NATIONAL INPATIENT SAMPLE (NIS), 2013
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2013.jsp
    January 01, 2013 - Analyses of time trends using the HCUP NIS are recommended from 1993 forward because earlier samples … Analyses of time trends using the HCUP NIS are recommended from 1993 forward because earlier samples … of discharges from a sample of approximately 1,000 hospitals, whereas the proposed systematic design samples … Patient factors DRG Admission month The superior performance of the systematic design that samples … 0.58 0.57 0.55 Hospital Mortality 0.57 0.55 0.55 0.51 Based on 500 Simulated Samples

100. Calculating Variances Using the 1999 Nationwide Inpatient Sample (pdf file)
     hcup-us.ahrq.gov/db/nation/kid/reports/CalculatingKIDVariances.pdf
     December 16, 2005 - • The SURVEYSELECT procedure provides a variety of methods for selecting probability-based random samples … The procedure can select a simple random sample, or samples with design features such as stratification