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101. Healthcare Cost and Utilization Project (HCUP) NRD Notes
     hcup-us.ahrq.gov/db/vars/discwt/nrdnote.jsp
     August 01, 2015 - Cost-to-Charge Ratio (CCR) Files Hospital Market Structure (HMS) Files Supplemental Variables for Revisit Analyses … DISCWT should be used to create national estimates for all analyses except those that involve total charge

102. Healthcare Cost and Utilization Project (HCUP) NIS Notes
     hcup-us.ahrq.gov/db/vars/discwt/nisnote.jsp
     September 01, 2008 - Cost-to-Charge Ratio (CCR) Files Hospital Market Structure (HMS) Files Supplemental Variables for Revisit Analyses … DISCWT should be used to create national estimates for all analyses except those that involve total charge

103. Healthcare Cost and Utilization Project (HCUP) NIS Notes
     hcup-us.ahrq.gov/db/vars/d10cwt_u/nisnote.jsp
     September 10, 2008 - Cost-to-Charge Ratio (CCR) Files Hospital Market Structure (HMS) Files Supplemental Variables for Revisit Analyses … DISCWT10 should be used to create national estimates for all analyses except those that involve total

104. Healthcare Cost and Utilization Project (HCUP) NIS Notes
     hcup-us.ahrq.gov/db/vars/discwt_u/nisnote.jsp
     September 01, 2008 - Cost-to-Charge Ratio (CCR) Files Hospital Market Structure (HMS) Files Supplemental Variables for Revisit Analyses … DISCWT should be used to create national estimates for all analyses except those that involve total charge

105. Healthcare Cost and Utilization Project (HCUP) NIS Notes
     hcup-us.ahrq.gov/db/vars/discwt10/nisnote.jsp
     September 01, 2008 - Cost-to-Charge Ratio (CCR) Files Hospital Market Structure (HMS) Files Supplemental Variables for Revisit Analyses … DISCWT should be used to create national estimates for all analyses except those that involve total charge

106. Healthcare Cost and Utilization Project (HCUP) NIS Notes
     hcup-us.ahrq.gov/db/vars/discwtcharge/nisnote.jsp
     September 01, 2008 - Cost-to-Charge Ratio (CCR) Files Hospital Market Structure (HMS) Files Supplemental Variables for Revisit Analyses … DISCWT should be used to create national estimates for all analyses except those that involve total charge

107. Healthcare Cost and Utilization Project (HCUP) NIS Notes
     hcup-us.ahrq.gov/db/vars/discwtcharge10/nisnote.jsp
     September 01, 2008 - Cost-to-Charge Ratio (CCR) Files Hospital Market Structure (HMS) Files Supplemental Variables for Revisit Analyses … DISCWT10 should be used to create national estimates for all analyses except those that involve total

108. THE HCUP NATIONWIDE READMISSIONS DATABASE (NRD), 2013
     hcup-us.ahrq.gov/db/nation/nrd/NRD_Introduction_2013.jsp
     January 01, 2013 - The NRD is designed to be flexible to various types of analyses of readmissions. … The NRD is designed to be flexible to various types of readmission analyses. … The NRD is not designed to support hospital-specific analyses. … The NRD was designed to support many different types of readmission analyses. … The definitions of the readmission rate were specific to the purpose of the analyses.

109. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2006
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2006.jsp
     January 01, 2006 - (Analyses of time trends are recommended from 1993 forward. … analyses except those that involve total charges. … DISCWT10 for all analyses 1988-1997 DISCWT_U for all analyses D10CWT_U … These were developed separately for hospital- and discharge-level analyses. … In all data years except 2000, this weight is used to create national estimates for all analyses.

110. HCUP Methods Series Calculating National Inpatient Sample (NIS) Variances for Data Years 2012 and Later
     hcup-us.ahrq.gov/reports/methods/2015_09.jsp
     January 01, 2015 - Several other commercial and noncommercial statistical programming packages allow weighted analyses. … AHRQ also provides "trend weights" that reduce the impact of sample design changes on trend analyses. … One of the difficulties analysts will face with this approach is the requirement to perform analyses … Given that a very large number of observations will be available for most analyses, it may be feasible … Longitudinal analyses of hospital-level outcomes may be biased if they are based on any subset of NIS

111. Calculating Variances Using the 1999 Nationwide Inpatient Sample (pdf file)
     hcup-us.ahrq.gov/reports/methods/2015-09.pdf
     January 01, 2015 - Several other commercial and noncommercial statistical programming packages allow weighted analyses. … One of the difficulties analysts will face with this approach is the requirement to perform analyses … Given that a very large number of observations will be available for most analyses, it may be feasible … Longitudinal analyses of hospital-level outcomes may be biased if they are based on any subset of NIS … In any case, the analyses may be more efficient (e.g., produce more precise estimates) if they account

112. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2008
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2008.jsp
     January 01, 2008 - (Analyses of time trends are recommended from 1993 forward. … (Analyses of time trends are recommended from 1993 forward. … analyses except those that involve total charges. … DISCWT10 for all analyses 1988-1997 DISCWT_U for all analyses D10CWT_U … These were developed separately for hospital- and discharge-level analyses.

113. Enhanced State Data for Analysis and Tracking of Comparative Effectiveness Impact
     hcup-us.ahrq.gov/datainnovations/mn.jsp
     October 01, 2010 - Cost-to-Charge Ratio (CCR) Files Hospital Market Structure (HMS) Files Supplemental Variables for Revisit Analyses … dataset will support better measurement of risk-adjusted clinical outcomes and comparative effectiveness analyses

114. Clinical Classifications for Health Policy Research: Hospital Inpatient Statistics, 1992
     hcup-us.ahrq.gov/reports/natstats/his.htm
     December 01, 1998 - The estimated total number of discharges represented in these analyses is 34,989,827. … For all analyses, only the principal diagnosis and principal procedure were used.

115. untitled (pdf file)
     hcup-us.ahrq.gov/datainnovations/Opioid_trends_ICD_Med_Care.pdf
     May 15, 2017 - Moore, PhD,‡ and Anne Elixhauser, PhD* Background: Trend analyses of opioid-related inpatient stays … This study exam- ines how trend analyses of inpatient stays involving opioid diagnoses were affected … serious infections associated with injection opioid use nearly doubled between 2002 and 2012.2 Previous analyses … Databases that include both ICD-9-CM and ICD-10-CM codes represent a new challenge for trend analyses … Given the discontinuities in trends by diagnosis type and patient age, we recommend that trend analyses

116. Overview to the HCUP Nationwide Inpatient Sample (NIS), 2000
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2000.jsp
     January 01, 2000 - Prior to 2000, this weight is used to create national estimates for all analyses. … Beginning in 2000, this weight is used to create national estimates for all analyses excluding those … Prior to 2000, this weight is used to create national estimates for all analyses. … Beginning in 2000, this weight is used to create national estimates for all analyses excluding those … Prior to 2000, this weight is used to create national estimates for all analyses.

117. HEALTHCARE COST AND UTILIZATION PROJECT — HCUP (pdf file)
     hcup-us.ahrq.gov/db/nation/nis/NIS_2008_INTRODUCTION.pdf
     January 01, 2008 - (Analyses of time trends are recommended from 1993 forward. … (Analyses of time trends are recommended from 1993 forward. …  DISCWT10 for all analyses 2000  DISCWT to create nationwide estimates for all analyses except …  DISCWT10 for all analyses 1988-1997  DISCWT_U for all analyses  D10CWT_U for all analyses … These were developed separately for hospital- and discharge-level analyses.

118. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2010
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2010.jsp
     January 01, 2010 - (Analyses of time trends are recommended from 1993 forward. … (Analyses of time trends are recommended from 1993 forward. … analyses except those that involve total charges. … DISCWT10 for all analyses 1988 - 1997 DISCWT_U for all analyses … These were developed separately for hospital- and discharge-level analyses.

119. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2009
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2009.jsp
     January 01, 2009 - (Analyses of time trends are recommended from 1993 forward. … (Analyses of time trends are recommended from 1993 forward. … analyses except those that involve total charges. … DISCWT10 for all analyses 1988-1997 DISCWT_U for all analyses D10CWT_U … These were developed separately for hospital- and discharge-level analyses.

120. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2011
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2011.jsp
     January 01, 2011 - (Analyses of time trends are recommended from 1993 forward. … (Analyses of time trends are recommended from 1993 forward. … analyses except those that involve total charges. … DISCWT10 for all analyses 1988 - 1997 DISCWT_U for all analyses … These were developed separately for hospital-and discharge-level analyses.