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Showing results for "sampling".

161. 2003 HCUP Nationwide Inpatient Sample (NIS) Comparison Report
     hcup-us.ahrq.gov/db/nation/nis/reports/2003niscomparisonrpt.jsp
     May 01, 2016 - The sampling frame for the NIS is based on AHA Survey data. … The first section describes the NIS and changes in the sampling strategy that occurred in 1998. … Table 1 illustrates how the NIS sampling frame has grown. … Sampling error exists in both the NHDS and the NIS. … Therefore, the comparison statistics have no associated sampling error.

162. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2005
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2005.jsp
     January 01, 2005 - (See the report, Changes in the NIS Sampling and Weighting Strategy for 1998 , which describes these … In order to improve the representativeness of the NIS, the sampling and weighting strategy was modified … The hospitals were sorted according to these variables prior to systematic random sampling. … sampling frame required to net a total of 20 percent of hospitals nationally. … The NIS-Trends weights account for this change in NIS sampling.

163. Overview to the HCUP Nationwide Inpatient Sample (NIS), 2001
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2001.jsp
     January 01, 2001 - In order to improve the representativeness of the NIS, the sampling and weighting strategy was modified … The full description of this process can be found in the special report on Changes in NIS Sampling and … The hospitals were sorted according to these variables prior to systematic random sampling. … sampling frame required to net a total of 20 percent of hospitals nationally. … Estimates from earlier years of the NIS may be subject to more sampling bias than later years of the

164. HCUP_methods_series_cover.ai (pdf file)
     hcup-us.ahrq.gov/reports/methods/2005_03_del_379.pdf
     January 01, 2005 - Table 1 illustrates how the NIS sampling frame has grown. … No hospitals were dropped from the sampling frame. … NIS Sampling The overall sampling objective was to select a sample of hospitals that could be generalized … Sampling error exists in both the NHDS and the NIS. … Therefore, the comparison statistics have no associated sampling error.

165. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2004
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2004.jsp
     January 01, 2004 - (See the report, Changes in the NIS Sampling and Weighting Strategy for 1998 , which describes these … In order to improve the representativeness of the NIS, the sampling and weighting strategy was modified … The hospitals were sorted according to these variables prior to systematic random sampling. … sampling frame required to net a total of 20 percent of hospitals nationally. … The NIS-Trends weights account for this change in NIS sampling.

166. C (pdf file)
     hcup-us.ahrq.gov/reports/methods/2010_05.pdf
     January 01, 2010 - There is no sampling error associated with this calculated ALOS. … of length of stay, which would be the true population standard deviation, also calculated without sampling … There is no sampling error. … Therefore, the sample mean is a “random variable” that has a “sampling distribution” describing the … For simple random sampling from an infinitely large population, the formula for the standard error of

167. Overview to the HCUP Nationwide Inpatient Sample (NIS), 2002
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2002.jsp
     January 01, 2002 - In order to improve the representativeness of the NIS, the sampling and weighting strategy was modified … The full description of this process can be found in the special report on Changes in NIS Sampling and … The hospitals were sorted according to these variables prior to systematic random sampling. … sampling frame required to net a total of 20 percent of hospitals nationally. … Estimates from earlier years of the NIS may be subject to more sampling bias than later years of the

168. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2003
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2003_v7.jsp
     January 01, 2003 - (See the report, Changes in the NIS Sampling and Weighting Strategy for 1998 , which describes these … In order to improve the representativeness of the NIS, the sampling and weighting strategy was modified … The full description of this process can be found in the special report on Changes in NIS Sampling and … The hospitals were sorted according to these variables prior to systematic random sampling. … sampling frame required to net a total of 20 percent of hospitals nationally.

169. HCUP Calculating Standard Errors - Accessible Version
     hcup-us.ahrq.gov/tech_assist/standarderrors/508/508course_2016.jsp
     January 01, 2016 - estimation purposes, hospitals should be treated as though they were selected at the first stage of sampling … Discharges in the sampling frame are stratified by five key hospital characteristics. … In sampling terminology, each emergency department is considered a cluster. … All of the discharges in the sampling frame were included, making the NRD a sample of convenience. … In particular, I will use the SAS survey sampling and analysis procedures.

170. INTRODUCTION TO THE HCUP KIDS' INPATIENT DATABASE (KID), 2003
     hcup-us.ahrq.gov/db/nation/kid/kid_2003_introduction_rpt.jsp
     January 01, 2003 - The sampling frame is limited to pediatric discharges from community, non-rehabilitation hospitals in … Instead, the KID includes a sample of pediatric discharges from all hospitals in the sampling frame. … For the sampling, pediatric discharges are stratified by uncomplicated in-hospital birth, complicated … These were the same characteristics used to define the NIS sampling strata (ownership/control, bedsize … Estimates from earlier years of the KID may be subject to more sampling bias than later years of the

171. Description of Data Elements (pdf file)
     hcup-us.ahrq.gov/db/nation/nis/DataElements_NIS_2002_Hospital.pdf
     January 01, 2002 - For detailed information about the NIS sampling design, see the year-specific report on the Design of … For detailed information about the NIS sampling design, see the year-specific report on the Design of … For detailed information about the NIS sampling design, see the year-specific report on the Design of … For detailed information about the NIS sampling design, see the year-specific report on the Design of … For detailed information about the NIS sampling design, see the year-specific report on the Design of

172. HCUP-US NIS Overview
     hcup-us.ahrq.gov/nisoverview.jsp
     February 01, 2025 - The new sampling strategy produces more precise estimates than the previous NIS design by reducing sampling … hospital identifiers means that hospital linkages can no longer be done with the NIS and the sampling … However, the database has undergone changes over time, including the sampling and weighting strategy

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

174. HCUP-US Index Page
     hcup-us.ahrq.gov/tech_assist/index_stu.jsp
     February 01, 2022 - W | X | Y | Z     S Sample Design (HCUP) Course Sampling … design - KID Sampling design - NIS SASD SEDD Serving the Uninsured: Safety-Net Hospitals,

175. Healthcare Cost and Utilization Project (HCUP) NIS Description of Data Elements - Hospital Notes (pdf file)
     hcup-us.ahrq.gov/db/nation/nis/DataElements_NIS_2003_HOSPITAL.pdf
     January 01, 2003 - For detailed information about the NIS sampling design, see the year-specific report on the Design of … For detailed information about the NIS sampling design, see the year-specific report on the Design of … For detailed information about the NIS sampling design, see the year-specific report on the Design of … For detailed information about the NIS sampling design, see the year-specific report on the Design of … For detailed information about the NIS sampling design, see the year-specific report on the Design of

176. Healthcare Cost and Utilization Project (HCUP) NIS Description of Data Elements - Hospital Notes (pdf file)
     hcup-us.ahrq.gov/db/nation/nis/DataElements_NIS_2004_Hospital.pdf
     January 01, 2004 - For detailed information about the NIS sampling design, see the year-specific report on the Design of … For detailed information about the NIS sampling design, see the year-specific report on the Design of … For detailed information about the NIS sampling design, see the year-specific report on the Design of … For detailed information about the NIS sampling design, see the year-specific report on the Design of … For detailed information about the NIS sampling design, see the year-specific report on the Design of

177. C:\unzipped\Methods Series Reports to Convert\Comparison_Report_NIS4 1995.wpd (pdf file)
     hcup-us.ahrq.gov/reports/methods/Comparison_Report_NIS41995Final.pdf
     December 21, 1998 - However, the NIS sampling frame was constructed from the subset of universe hospitals that released their … 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. … Sample or Universe Sample Sample Sampling Frame 19 states 50 states and the District of Columbia

178. Healthcare Cost and Utilization Project (HCUP) NASS Notes
     hcup-us.ahrq.gov/db/vars/nass_stratum/nassnote.jsp
     August 01, 2019 - 100-174 175+ Urban, teaching 1-199 200-324 325+ Some strata were combined for sampling … Status HOSP_LOCTEACH Ownership HOSP_CONTROL For detailed information about the NASS sampling

179. C:\unzipped\Methods Series Reports to Convert\Comparison_Report_NIS2 1993.wpd (pdf file)
     hcup-us.ahrq.gov/reports/methods/Comparison_Report_NIS21993Final.pdf
     April 03, 1997 - However, the NIS sampling frame was constructed from the subset of universe hospitals that released their … 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

180. Microsoft Word - kid_dde_hospnotes_2000.doc (pdf file)
     hcup-us.ahrq.gov/db/nation/kid/DataElements_KID_Hospital_2000.pdf
     January 01, 2000 - For detailed information about the KID sampling design, see the year-specific report on the Design of … For detailed information about the KID sampling design, see the year-specific report on the Design of … For detailed information about the KID sampling design, see the year-specific report on the Design of … For detailed information about the KID sampling design, see the year-specific report on the Design of … For detailed information about the KID sampling design, see the year-specific report on the Design of