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Showing results for "sampling".

81. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2008
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2008.jsp
    January 01, 2008 - SAMPLING OF HOSPITALS Sampling of Hospitals Included in the NIS The NIS Hospital Universe The … Change to Hospital Sampling Procedure Beginning with the 1998 NIS Beginning with the 1998 NIS sampling … for hospital-level sampling weights. … Confidentiality of Hospitals - Limitation on Sampling Limitations on sampling were required … were fewer than two hospitals in a sampling stratum.

82. HEALTHCARE COST AND UTILIZATION PROJECT — HCUP (pdf file)
    hcup-us.ahrq.gov/db/nation/kid/KID_2009_Introduction.pdf
    January 01, 2009 -  Rk is the frame sampling rate for non-newborns from all non-newborn discharges in the sampling … o One stand-alone children’s hospital was excluded from the sampling frame. … No hospitals were dropped from the sampling frame. … were fewer than two hospitals in a sampling stratum. …  “KID Sampling-Frame Hospitals” lists hospitals with pediatric discharges in the sampling frame

83. Table 2: NIS and NHDS Comparisons by Region, 1999 (pdf file)
    hcup-us.ahrq.gov/reports/methods/1999NISComparisonReportFinal.pdf
    March 08, 2002 - specifications of the new NIS sampling strategy. … NIS Sampling The overall sampling objective was to select a sample of hospitals that could be generalized … Sampling error can be expected in both the NHDS and the NIS. … Because the sampling error in a stratified sample is the sum of the stratum- level sampling errors (Lehtonen … First, some differences exist in the sampling strategies used.

84. Kid 1997 Overview (pdf file)
    hcup-us.ahrq.gov/db/nation/kid/Kid_1997_overview.pdf
    January 01, 1997 - The sampling frame is limited to pediatric discharges from community hospitals for which data were provided … The stratum-specific sampling rates are constant across all hospitals in the sampling frame. … This file contains data elements for linkage to the Core file, hospital characteristics, and summary sampling

85. 2006 05 Nistrendsreport 1988-2004A (pdf file)
    hcup-us.ahrq.gov/reports/methods/2006_05_NISTrendsReport_1988-2004A.pdf
    January 01, 2006 - o Redefined the hospital stratification variables for sampling. … States Added to or Subtracted From the Sampling Frame. … the NIS increased as new States were added to the sampling frame. … This decrease is associated with the expanding sampling frame. … In particular, as the sampling frame increased over time, we were more successful at sampling 20 percent

86. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2007
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2007.jsp
    January 01, 2007 - SAMPLING OF HOSPITALS Sampling of Hospitals Included in the NIS The NIS Hospital Universe The … Change to Hospital Sampling Procedure Beginning with the 1998 NIS Beginning with the 1998 NIS sampling … for hospital-level sampling weights. … Confidentiality of Hospitals - Limitation on Sampling Limitations on sampling were needed for … were fewer than two hospitals in a sampling stratum.

87. Calculating Variances Using the 1999 Nationwide Inpatient Sample (pdf file)
    hcup-us.ahrq.gov/db/nation/kid/reports/CalculatingKIDVariances.pdf
    December 16, 2005 - The KID includes a sample of pediatric discharges from all hospitals in the sampling frame. … As the sampling fraction f approaches 1, the sampling variance approaches zero. … It can accommodate very large sampling frames. … PROC SURVEYSELECT accepts the sampling frame as a SAS data set. … without replacement of sampling units within strata.

88. Calculating Variances Using the 1999 Nationwide Inpatient Sample (pdf file)
    hcup-us.ahrq.gov/reports/methods/2005-07.pdf
    January 01, 2005 - The KID includes a sample of pediatric discharges from all hospitals in the sampling frame. … As the sampling fraction f approaches 1, the sampling variance approaches zero. … It can accommodate very large sampling frames. … PROC SURVEYSELECT accepts the sampling frame as a SAS data set. … without replacement of sampling units within strata.

89. HEALTHCARE COST AND UTILIZATION PROJECT — HCUP (pdf file)
    hcup-us.ahrq.gov/db/nation/nis/2006NIS_INTRODUCTION.pdf
    November 01, 2015 - The NIS-Trends weights account for this change in NIS sampling. … SAMPLING OF HOSPITALS Sampling of Hospitals Included in the NIS The NIS Hospital Universe The … Change to Hospital Sampling Procedure Beginning with the 1998 NIS Beginning with the 1998 NIS sampling … No hospitals were dropped from the sampling frame. … were fewer than two hospitals in a sampling stratum.

90. HEALTHCARE COST AND UTILIZATION PROJECT — HCUP (pdf file)
    hcup-us.ahrq.gov/db/nation/nis/NISIntroduction2019.pdf
    September 01, 2021 - The new sampling strategy produces more precise estimates than the previous NIS design by reducing sampling … sampling error. … The NIS sampling and weighting strategy was also revised in 1998. … Overview of the Sampling Procedure The strata for the 2012 and later NIS systematic sampling design … Thus, the sampling rate would not always be 20 percent for each stratum.

91. HCUP_methods_series_cover.ai (pdf file)
    hcup-us.ahrq.gov/reports/methods/TrendReport2005_1.pdf
    March 19, 2004 - Added States to the Sampling Frame. … Redefined the Hospital Stratification Variables for Sampling. … For example, New York was added to the NIS sampling frame in 1993. … This decrease is associated with the expanding sampling frame. … In particular, as the sampling frame increased over time, we were more successful in sampling 20 percent

92. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2010
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2010.jsp
    January 01, 2010 - The NIS-Trends weights account for this change in NIS sampling. … SAMPLING OF HOSPITALS Sampling of Hospitals Included in the NIS The NIS Hospital Universe The … Change to Hospital Sampling Procedure Beginning with the 1998 NIS Beginning with the 1998 NIS sampling … for hospital-level sampling weights. … were fewer than two hospitals in a sampling stratum.

93. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2011
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2011.jsp
    January 01, 2011 - The NIS-Trends weights account for this change in NIS sampling. … SAMPLING OF HOSPITALS Sampling of Hospitals Included in the NIS The NIS Hospital Universe The … Change to Hospital Sampling Procedure Beginning with the 1998 NIS Beginning with the 1998 NIS sampling … for hospital-level sampling weights. … were fewer than two hospitals in a sampling stratum.

94. INTRODUCTION TO THE HCUP KIDS' INPATIENT DATABASE (KID), 2019
    hcup-us.ahrq.gov/db/nation/kid/kid_2019_introduction.jsp
    January 01, 2012 - Changes to Sampling and Weighting Strategy Beginning with the 2000 KID Sampling Procedure SAMPLE … Return to Contents SAMPLING OF DISCHARGES Sampling of Discharges Included in the KID Unlike … sampling frame. … R k is the frame sampling rate for non-newborns from all non-newborn discharges in the sampling frame … "KID Sampling-Frame Hospitals" lists hospitals with pediatric discharges in the sampling frame after

95. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2009
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2009.jsp
    January 01, 2009 - The NIS-Trends weights account for this change in NIS sampling. … SAMPLING OF HOSPITALS Sampling of Hospitals Included in the NIS The NIS Hospital Universe The … Change to Hospital Sampling Procedure Beginning with the 1998 NIS Beginning with the 1998 NIS sampling … for hospital-level sampling weights. … were fewer than two hospitals in a sampling stratum.

96. HEALTHCARE COST AND UTILIZATION PROJECT — HCUP (pdf file)
    hcup-us.ahrq.gov/db/nation/nis/NIS_2008_INTRODUCTION.pdf
    January 01, 2008 - The NIS-Trends weights account for this change in NIS sampling. … SAMPLING OF HOSPITALS Sampling of Hospitals Included in the NIS The NIS Hospital Universe The … for hospital-level sampling weights. … No hospitals were dropped from the sampling frame. … were fewer than two hospitals in a sampling stratum.

97. INTRODUCTION TO THE HCUP KIDS' INPATIENT DATABASE (KID), 2012
    hcup-us.ahrq.gov/db/nation/kid/kid_2012_introduction.jsp
    January 01, 1998 - Return to Introduction SAMPLING OF DISCHARGES Sampling of Discharges Included in the KID … Sampling Procedure The KID includes a sample of pediatric discharges from all hospitals in the sampling … A k is the total number of adjusted births in the restricted sampling frame. … R k is the frame sampling rate for non-newborns from all non-newborn discharges in the sampling frame … "KID Sampling-Frame Hospitals" lists hospitals with pediatric discharges in the sampling frame after

98. HEALTHCARE COST AND UTILIZATION PROJECT — HCUP (pdf file)
    hcup-us.ahrq.gov/db/nation/nis/NIS_2007_INTRODUCTION.pdf
    January 01, 2007 - SAMPLING OF HOSPITALS Sampling of Hospitals Included in the NIS The NIS Hospital Universe The … Change to Hospital Sampling Procedure Beginning with the 1998 NIS Beginning with the 1998 NIS sampling … Confidentiality of Hospitals - Limitation on Sampling Limitations on sampling were needed for the following … No hospitals were dropped from the sampling frame. … were fewer than two hospitals in a sampling stratum.

99. INTRODUCTION TO THE HCUP KIDS' INPATIENT DATABASE (KID), 2016
    hcup-us.ahrq.gov/db/nation/kid/kid_2016_introduction.jsp
    January 01, 2016 - Return to Introduction SAMPLING OF DISCHARGES Sampling of Discharges Included in the KID … Sampling Procedure The KID includes a sample of pediatric discharges from all hospitals in the sampling … A k is the total number of adjusted births in the restricted sampling frame. … R k is the frame sampling rate for non-newborns from all non-newborn discharges in the sampling frame … "KID Sampling-Frame Hospitals" lists hospitals with pediatric discharges in the sampling frame after

100. INTRODUCTION TO THE HCUP NATIONAL INPATIENT SAMPLE (NIS), 2018
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2018.jsp
     January 01, 2018 - The new sampling strategy produces more precise estimates than the previous NIS design by reducing sampling … The new sampling strategy produces more precise estimates than the previous NIS design by reducing sampling … The NIS sampling and weighting strategy was also revised in 1998. … Variance estimates must consider both the sampling design and the form of the statistic. … Thus, the sampling rate would not always be 20 percent for each stratum.