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41. HCUP Nationwide Inpatient Sample Design Report 2003
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_2003_Design_Report.jsp
    January 01, 2003 - (NIS) Design Report HCUP Nationwide Inpatient Sample Design of the HCUP Nationwide Inpatient Sample … Final Hospital Sample The final 2003 sample included 7,977,728 discharges from 994 hospitals selected … Sample Weights It is necessary to incorporate sample weights to obtain nationwide estimates. … number for the total sample. … and sample, respectively.

42. HCUP Nationwide Inpatient Sample Design Report 2001
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_2001_Design_Report.jsp
    January 01, 2001 - Hospital Sampling Frame Final Hospital Sample Subsamples Sample Weights Weight Data Elements … Final Hospital Sample The final 2001 sample included 7,452,727 discharges from 986 hospitals selected … Sample Weights It is necessary to incorporate sample weights to obtain nationwide estimates. … the total sample. … ) and N s (sample) were the number of community hospitals within stratum s in the universe and sample

43. HCUP Nationwide Inpatient Sample Design Report 1998
    hcup-us.ahrq.gov/db/nation/nis/reports/NIS_1998_Design_Report.jsp
    January 01, 1998 - Calendar Year States Sample Hospitals Sample Discharges (Millions) 1988–1992 … resultant hospital sample. … are presented for both the regular NIS sample and the total sample. … NIS Hospital Samples Regular Sample Total Sample Year Number of Hospitals Number of … ) and N s (sample) were the number of community hospitals within stratum s in the universe and sample

44. INTRODUCTION TO THE HCUP NATIONAL INPATIENT SAMPLE (NIS), 2021
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2021.jsp
    January 01, 2021 - HCUP National Inpatient Sample (NIS) ABSTRACT The National Inpatient Sample (NIS) is part of the … Rather than first drawing a sample of hospitals and then keeping all discharges from that sample … The systematic sample starting in 2012 is a self-weighted sample design similar to simple random sampling … Rather than first drawing a sample of hospitals and then keeping all discharges from that sample, … The new systematic sample is a self-weighted sample design similar to simple random sampling, but

45. INTRODUCTION TO THE HCUP NATIONAL INPATIENT SAMPLE (NIS), 2020
    hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2020.jsp
    January 01, 2020 - HCUP National Inpatient Sample (NIS) ABSTRACT The National Inpatient Sample (NIS) is part of the … First, the sample design was revised to create a sample of discharge records from all HCUP-participating … Rather than first drawing a sample of hospitals and then keeping all discharges from that sample, in … Rather than first drawing a sample of hospitals and then keeping all discharges from that sample, in … The new systematic sample is a self-weighted sample design similar to simple random sampling, but it

46. Calculating Variances Using the 1999 Nationwide Inpatient Sample (pdf file)
    hcup-us.ahrq.gov/reports/methods/2003_02.pdf
    January 01, 2003 - NIS Sample Design The final sample design is as follows. … NIS Sample Weights The discharge sample weights are calculated within each sampling stratum as the … However, the sample of NIS discharges is not a simple random sample. … We will consider the NIS sample as a two-stage cluster sample, even though the sampling rate was 100 … fsh = the proportion of the discharges in the sample from sample hospital h within stratum s.

47. Calculating Variances Using the 1999 Nationwide Inpatient Sample (pdf file)
    hcup-us.ahrq.gov/reports/methods/2005-07.pdf
    January 01, 2005 - KID Sample Weights For the discharge sample weights, we post-stratified hospitals on six characteristics … However, the sample of KID discharges is not a simple random sample. … fsh = the proportion of the discharges in the sample from sample hospital h within stratum s. … For the sample selection procedure, the sample design can be a complex multistage sample design that … HCUP KID 12/16/05 B-6 Appendix B EXECUTIVE SUMMARY INTRODUCTION KID Sample Design KID Sample

48. THE HCUP NATIONWIDE AMBULATORY SURGERY SAMPLE (NASS) 2019
    hcup-us.ahrq.gov/db/nation/nass/NASS_Introduction_2019.jsp
    January 01, 2019 - The HCUP Sample Design tutorial is designed to help users learn how to account for sample design in … On the basis of the set of NASS sample hospitals and universe totals, sample weights are computed that … Computation of sample weights is straightforward. … universe to sample encounter volumes so that the sample volume is inflated to agree with the universe … NASS Target Universe, Sampling Frame, and Final Sample Characteristics, 2019 Sample Description

49. THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2015
    hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2015.jsp
    January 01, 2015 - ) and N s (sample) were the number of hospital-owned EDs within stratum s in the universe and sample … A larger sample would be cumbersome for data users, given that a 20 percent sample contains about 30 … The HCUP Nationwide Inpatient Sample (NIS) prior to 2012 used stratified sample design similar to the … The HCUP Nationwide Inpatient Sample (NIS) prior to 2012 used stratified sample design similar to the … ED visit information from a sample of EDs HCUP Nationwide Emergency Department Sample (NEDS) Nationwide

50. THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2016
    hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2016.jsp
    January 01, 2016 - ) and N s (sample) were the number of hospital-owned EDs within stratum s in the universe and sample … A larger sample would be cumbersome for data users, given that a 20 percent sample contains about 30 … The HCUP Nationwide Inpatient Sample (NIS) prior to 2012 used stratified sample design similar to the … The HCUP Nationwide Inpatient Sample (NIS) prior to 2012 used stratified sample design similar to the … ED visit information from a sample of EDs HCUP Nationwide Emergency Department Sample (NEDS) Nationwide

51. THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2014
    hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2014.jsp
    January 01, 2014 - ) and N s (sample) were the number of hospital-owned EDs within stratum s in the universe and sample … A larger sample would be cumbersome for data users, given that a 20 percent sample contains about 30 … The HCUP Nationwide Inpatient Sample (NIS) prior to 2012 used stratified sample design similar to the … The HCUP Nationwide Inpatient Sample (NIS) prior to 2012 used stratified sample design similar to the … ED visit information from a sample of EDs HCUP Nationwide Emergency Department Sample (NEDS) Nationwide

52. THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2013
    hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2013.jsp
    January 01, 2013 - ) and N s (sample) were the number of hospital-based EDs within stratum s in the universe and sample … A larger sample would be cumbersome for data users, given that a 20 percent sample contains about 30 … The HCUP Nationwide Inpatient Sample (NIS) prior to 2012 used stratified sample design similar to the … The HCUP Nationwide Inpatient Sample (NIS) prior to 2012 used stratified sample design similar to the … ED visit information from a sample of hospital-based EDs HCUP Nationwide Emergency Department Sample

53. THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2010
    hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2010.jsp
    January 01, 2010 - The NIS is a sample of U.S. hospitals; the NEDS is a sample of U.S. hospital-based EDs. … ) and N s (sample) were the number of hospital-based EDs within stratum s in the universe and sample … A larger sample would be cumbersome for data users, given that a 20% sample contains over 29 million … The HCUP Nationwide Inpatient Sample (NIS) uses the same stratified sample design, so techniques appropriate … ED visit information from a sample of hospital-based EDs HCUP Nationwide Emergency Department Sample

54. THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2009
    hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2009.jsp
    January 01, 2009 - The NIS is a sample of U.S. hospitals; the NEDS is a sample of U.S. hospital-based EDs. … ) and N s (sample) were the number of hospital-based EDs within stratum s in the universe and sample … A larger sample would be cumbersome for data users, given that a 20% sample contains over 29 million … The HCUP Nationwide Inpatient Sample (NIS) uses the same stratified sample design, so techniques appropriate … ED visit information from a sample of hospital-based EDs HCUP Nationwide Emergency Department Sample

55. THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2006
    hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2006v2.jsp
    November 01, 2015 - The main objective of a stratified sample is to ensure that the sample is representative of the target … ) and N s (sample) were the number of hospital-based EDs within stratum s in the universe and sample … A larger sample would be cumbersome for data users given that a 20% sample contains over 25 million … The HCUP Nationwide Inpatient Sample (NIS) uses the same stratified sample design, so techniques appropriate … ED visit information from a sample of hospital-based EDs HCUP Nationwide Emergency Department Sample

56. THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2011
    hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2011.jsp
    January 01, 2011 - The NIS is a sample of U.S. hospitals; the NEDS is a sample of U.S. hospital-based EDs. … ) and N s (sample) were the number of hospital-based EDs within stratum s in the universe and sample … A larger sample would be cumbersome for data users, given that a 20% sample contains 29 million records … The HCUP Nationwide Inpatient Sample (NIS) uses the same stratified sample design, so techniques appropriate … ED visit information from a sample of hospital-based EDs HCUP Nationwide Emergency Department Sample

57. THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2012
    hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2012.jsp
    January 01, 2012 - ) and N s (sample) were the number of hospital-based EDs within stratum s in the universe and sample … A larger sample would be cumbersome for data users, given that a 20 percent sample contains 31 million … The HCUP Nationwide Inpatient Sample (NIS) prior to 2012 used stratified sample design similar to the … The HCUP Nationwide Inpatient Sample (NIS)) prior to 2012 used stratified sample design similar to the … ED visit information from a sample of hospital-based EDs HCUP Nationwide Emergency Department Sample

58. THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2007
    hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2007v2.jsp
    November 01, 2015 - The main objective of a stratified sample is to ensure that the sample is representative of the target … ) and N s (sample) were the number of hospital-based EDs within stratum s in the universe and sample … A larger sample would be cumbersome for data users given that a 20% sample contains over 25 million … The HCUP Nationwide Inpatient Sample (NIS) uses the same stratified sample design, so techniques appropriate … ED visit information from a sample of hospital-based EDs HCUP Nationwide Emergency Department Sample

59. THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2008
    hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2008.jsp
    January 01, 2008 - The main objective of a stratified sample is to ensure that the sample is representative of the target … ) and N s (sample) were the number of hospital-based EDs within stratum s in the universe and sample … A larger sample would be cumbersome for data users given that a 20% sample contains over 28 million records … The HCUP Nationwide Inpatient Sample (NIS) uses the same stratified sample design, so techniques appropriate … ED visit information from a sample of hospital-based EDs HCUP Nationwide Emergency Department Sample

60. THE HCUP NATIONWIDE AMBULATORY SURGERY SAMPLE (NASS) 2017
    hcup-us.ahrq.gov/db/nation/nass/NASS_Introduction_2017.jsp
    January 01, 2017 - The HCUP Sample Design tutorial is designed to help users learn how to account for sample design in … On the basis of the set of NASS sample hospitals and universe totals, sample weights are computed that … Computation of sample weights is straightforward. … universe to sample encounter volumes so that the sample volume is inflated to agree with the universe … NASS Target Universe, Sampling Frame, and Final Sample Characteristics, 2017 Sample Description