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Total Results: 1,763 records

Showing results for "sampling".

181. NEDS Database Documentation - Corrections
     hcup-us.ahrq.gov/db/nation/neds/nedscorrections.jsp
     February 01, 2013 - In Version 2, these hospitals were reclassified to be included in the sampling frame at their appropriate … In Version 3, these hospitals were reclassified to be included in the sampling frame at their appropriate

182. HEALTHCARE COST AND UTILIZATION PROJECT — HCUP (pdf file)
     hcup-us.ahrq.gov/db/nation/kid/Introduction_to_KID_2000.pdf
     January 01, 2000 - The sampling frame is limited to pediatric discharges from community, non-rehabilitation hospitals for … The sampling frame is limited to pediatric discharges from community, non-rehabilitation hospitals for … Instead, the KID includes a sample of pediatric discharges from all hospitals in the sampling frame. … For the sampling, we stratified pediatric discharges by uncomplicated in-hospital birth, complicated … We then used systematic random sampling to select 10 percent of uncomplicated in-hospital births and

183. Overview to the HCUP Nationwide Inpatient Sample (NIS), 2000
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2000.jsp
     January 01, 2000 - Inpatient Stays State-Specific Restrictions Contents of CD-ROM Set NIS Data Elements SAMPLING … In order to improve the representativeness of the NIS, the sampling and weighting strategy was modified … The full descriptions of this process can be found in the special report on Changes in NIS Sampling … Stratification Variables To help ensure generalizability, five hospital sampling strata were defined … The hospitals were sorted according to these variables prior to systematic random sampling.

184. NEDS Overview
     hcup-us.ahrq.gov/nedsoverview.jsp
     November 01, 2024 - Beginning with data year 2022, emergency departments (EDs) in New Mexico are included in the NEDS sampling … records representing admissions directly from the ED to the same hospital were excluded from the NEDS sampling … EDs included in the NEDS sampling frame were required to have two types of ED records reported in the

185. Checklist for Working with the NRD
     hcup-us.ahrq.gov/db/nation/nrd/nrdchecklist.jsp
     November 01, 2024 - Return to top Research Design ⬜ Learn how to account for the NRD sampling design. … Accounting for the sampling design is critical for accurate analyses. … For more information, review the "Sampling Design of the NRD" section of the Introduction to the NRD

186. Overview to the HCUP Nationwide Inpatient Sample (NIS), 1999
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_1999.jsp
     January 01, 1999 - Inpatient Stays State-Specific Restrictions Contents of CD-ROM Set NIS Data Elements SAMPLING … In order to improve the representativeness of the NIS, the sampling and weighting strategy was modified … The full descriptions of this process can be found in the special report on Changes in NIS Sampling … Stratification Variables To help ensure generalizability, five hospital sampling strata were defined … The hospitals were sorted according to these variables prior to systematic random sampling.

187. HCUP Overview Course - Accessible Version
     hcup-us.ahrq.gov/HCUP_Overview/HCUP_Overview/index508.jsp
     October 01, 2022 - All discharges from those community hospitals comprise the SID; there is no sampling of hospitals or … Sampling The NIS consists of a stratified systematic sample of discharges from all hospitals in … Because the NIS sampling frame is not designed with "State" as a stratification variable, State-level … Sampling The NEDS approximates a 20% sample of hospital-owned emergency departments in the U.S. … Sampling Strata NRD Sampling Strata Variables Discharges are post-stratified in the NRD on the basis

188. Healthcare Cost and Utilization Project (HCUP) NIS Notes
     hcup-us.ahrq.gov/db/vars/nis_stratum/nisnote.jsp
     September 01, 2008 - 100-174 175+ Urban, teaching 1-199 200-324 325+ Some strata were combined for sampling … Bedsize ST_BEDSZ H_BEDSZ HOSP_BEDSIZE HOSP_BEDSIZE For detailed information about the NIS sampling

189. Overview to the HCUP Nationwide Inpatient Sample (NIS), 1998
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_1998.jsp
     January 01, 1998 - In order to improve the representativeness of the NIS, the sampling and weighting strategy was modified … The full descriptions of this process can be found in the special report on Changes in NIS Sampling … For more detailed descriptions of the sampling design, refer to the year-specific special reports Design … Stratification Variables To help ensure generalizability, five hospital sampling strata were defined … The hospitals were sorted according to these variables prior to systematic random sampling.

190. THE HCUP NATIONWIDE READMISSIONS DATABASE (NRD), 2013
     hcup-us.ahrq.gov/db/nation/nrd/NRD_Introduction_2013.jsp
     January 01, 2013 - DESIGN OF THE NRD Target Universe Sampling Frame Discharge Weights Post-Stratification for … Return to Introduction   SAMPLING DESIGN OF THE NRD The NRD was built to facilitate analyses … All of the discharges in the sampling frame were included making the NRD a sample of convenience. … We use the term post-stratification because the stratification was performed after sampling. … Variance estimates must take into account both the sampling design and the form of the statistic.

191. 2004 HCUP Nationwide Inpatient Sample (NIS) Comparison Report
     hcup-us.ahrq.gov/db/nation/nis/reports/2004niscomparisonrpt.jsp
     May 01, 2016 - Sampling probabilities were calculated to select 20 percent of the universe in each stratum defined by … The sampling frame for the NIS is based on AHA Survey data. … Statistics from the NHDS are considered geographically representative because the NHDS sampling frame … These include: Random variation between the two samples Differences in sampling strategies … The AHA-derived sampling weights in the NIS yield discharge counts consistent with the AHA universe,

192. C:\unzipped\Methods Series Reports to Convert\Comparison_Report_NIS1 1988-92.wpd (pdf file)
     hcup-us.ahrq.gov/reports/methods/Comparison_Report_NIS11988-92Final.pdf
     July 11, 1996 - However, the NIS sampling frame was constructed from the subset of universe hospitals that released … To improve the generalizability of the NIS estimates, five hospital sampling strata were used: 1. … The NHDS sampling frame includes very few specialty hospitals such as psychiatric, maternity, alcohol … Statistics calculated from the NHDS do have sampling error. … Medicare discharge statistics calculated from this source have no sampling error associated with them

193. Introduction to the NRD, 2022 (pdf file)
     hcup-us.ahrq.gov/db/nation/nrd/NRDIntroduction2022.pdf
     December 01, 2024 - ----------------------------------------------------------------------------------------------- 17 Sampling … Sampling Frame The sampling frame for the NRD was limited to discharges for patients treated at community … All of the discharges in the sampling frame were included, making the NRD a sample of convenience. … Discharge Weights This section explains the need for post-stratification for weighting the sampling … Variance estimates must take into account both the sampling design and the form of the statistic.

194. HCUP_methods_series_cover.ai (pdf file)
     hcup-us.ahrq.gov/reports/methods/2005_06.pdf
     January 01, 2005 - The sampling strata were defined based on five hospital characteristics: geographic region, hospital … Hospitals were excluded from the sampling frame if the coding of patient race was suspect (i.e., more … The sampling and weighting strategy used for the disparities analysis file is similar to the method … There is no sampling error associated with Claritas population counts. … For Claritas population counts, there is no sampling error.

195. Microsoft Word - CaseforPOAIndicator_final_060806 _2_.doc (pdf file)
     hcup-us.ahrq.gov/reports/methods/2006_8.pdf
     January 01, 2006 - The sampling strata were defined based on five hospital characteristics: geographic region, hospital … Hospitals were excluded from the sampling frame if the coding of patient race was suspect (i.e., more … The sampling and weighting strategy used for the disparities analysis file is similar to the method … There is no sampling error associated with Claritas population counts. … For Claritas population counts, there is no sampling error.

196. HEALTHCARE COST AND UTILIZATION PROJECT — HCUP (pdf file)
     hcup-us.ahrq.gov/db/nation/nrd/Introduction_NRD_2013.pdf
     January 01, 2013 - Sampling Frame The sampling frame for the NRD was limited to discharges for patients treated at community … All of the discharges in the sampling frame were included making the NRD a sample of convenience. … Discharge Weights This section explains the need for post-stratification for weighting the sampling … We use the term post-stratification because the stratification was performed after sampling. … Variance estimates must take into account both the sampling design and the form of the statistic.

197. Trends in Observed Adult Inpatient Mortality for High-Volume Conditions, 2002–2012 (pdf file)
     hcup-us.ahrq.gov/reports/statbriefs/sb194-Inpatient-Mortality-High-Volume-Conditions.pdf
     November 01, 2014 - We did not use the 2012 NIS because the sampling design and universe definition was revised. … It is drawn from a sampling frame that contains hospitals comprising more than 95 percent of all discharges … Over time, the sampling frame for the NIS has changed; thus, the number of States contributing to the … The new sampling strategy is expected to result in more precise estimates than those that resulted from … the previous NIS design by reducing sampling error: for many estimates, confidence intervals under

198. C:\unzipped\Methods Series Reports to Convert\Comparison_Report_NIS6 1997.wpd (pdf file)
     hcup-us.ahrq.gov/reports/methods/Comparison_Report_NIS61997Final.pdf
     August 09, 2000 - To improve the generalizability of the NIS estimates, five hospital sampling strata were used: 1. … The NHDS sampling frame includes very few specialty hospitals such as psychiatric, maternity, alcohol … Statistics calculated from the NHDS do have sampling error. … However, the statistics are assumed to be unbiased because the sampling frame is relatively unrestricted … Medicare discharge statistics from this source have no sampling error associated with them, because this

199. Microsoft Word - CaseforPOAIndicator_final_060806 _2_.doc (pdf file)
     hcup-us.ahrq.gov/reports/methods/2007_03.pdf
     January 01, 2007 - Sampling probabilities were calculated to select 20 percent of the universe in each stratum defined … The sampling frame for the NIS is based on AHA Survey data. … Statistics from the NHDS are considered geographically representative because the NHDS sampling frame … These include: • Random variation between the two samples • Differences in sampling strategies … The AHA-derived sampling weights in the NIS yield discharge counts consistent with the AHA universe,

200. THE HCUP NATIONWIDE READMISSIONS DATABASE (NRD), 2019
     hcup-us.ahrq.gov/db/nation/nrd/Introduction_NRD_2019.jsp
     January 01, 2019 - DESIGN OF THE NRD Target Universe Sampling Frame Discharge Weights Post-Stratification for … Sampling Frame The sampling frame for the NRD was limited to discharges for patients treated at community … All of the discharges in the sampling frame were included, making the NRD a sample of convenience. … Discharge Weights This section explains the need for post-stratification for weighting the sampling … Variance estimates must take into account both the sampling design and the form of the statistic.