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  1. hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_1998.jsp
    January 01, 1998 - Overview to the HCUP Nationwide Inpatient Sample (NIS), 1998 An official website of the Department of Health & Human Services Search All AHRQ Websites Careers Contact Us Espanol …
  2. hcup-us.ahrq.gov/figures/nis_figure3_2008.jsp
    January 01, 2008 - Figure 3: NIS Hospital Sampling Frame, by Year Figure 3: NIS Hospital Sampling Frame, by Year Year Number of Hospitals 1988 1,247 1989 1,658 1990 6,620 1991 1,604 1992 1,591 1993 2,168 1994 2,135 1995 2,284 1996 2,268 19…
  3. hcup-us.ahrq.gov/figures/3_05.jsp
    Figure 3 : NIS Hospital Sampling Frame, by Year Figure 3 : NIS Hospital Sampling Frame, by Year Year 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 Number of Hospitals 1,247 1,658 1,620 1,604 1,591 2,168 2…
  4. hcup-us.ahrq.gov/figures/3_04.jsp
    Figure 3 : NIS Hospital Sampling Frame, by Year Figure 3 : NIS Hospital Sampling Frame, by Year Year 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 Number of Hospitals 1,247 1,658 1,620 1,604 1,591 2,168 2,135 …
  5. hcup-us.ahrq.gov/figures/3_03.jsp
    Figure 3 : NIS Hospital Sampling Frame, by Year Figure 3 : NIS Hospital Sampling Frame, by Year Year 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 Number of Hospitals 1,247 1,658 1,620 1,604 1,591 2,168 2,135 2,284 …
  6. hcup-us.ahrq.gov/figures/3_01.jsp
    Figure 3 : NIS Hospital Sampling Frame, by Year Figure 3 : NIS Hospital Sampling Frame, by Year Year 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 Number of Hospitals 1,247 1,658 1,620 1,604 1,591 2,168 2,135 2,284 2,268 2,452…
  7. hcup-us.ahrq.gov/figures/3_02.jsp
    Figure 3 : NIS Hospital Sampling Frame, by Year Figure 3 : NIS Hospital Sampling Frame, by Year Year 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 Number of Hospitals 1,247 1,658 1,620 1,604 1,591 2,168 2,135 2,284 2,268 …
  8. hcup-us.ahrq.gov/db/nation/nass/2019_NASS_Introduction.pdf
    January 01, 2019 - INTRODUCTION TO THE HCUP NATIONWIDE AMBULATORY SURGERY SAMPLE (NASS) 2019 HEALTHCARE COST AND UTILIZATION PROJECT — HCUP A FEDERAL-STATE-INDUSTRY PARTNERSHIP IN HEALTH DATA Sponsored by the Agency for Healthcare Research and Quality INTRODUCTION TO THE HCUP NATIONWIDE AMBULATORY SURGERY SAMPLE (NASS) 20…
  9. hcup-us.ahrq.gov/db/nation/kid/KIDIntroduction2022.pdf
    December 01, 2024 - Standard formulas for stratified, two-stage cluster samples without replacement may be used to calculate
  10. hcup-us.ahrq.gov/db/nation/kid/reports/KID_design_rpt_2003.jsp
    January 01, 2003 - Standard formulas for stratified, two-stage cluster samples without replacement may be used to calculate
  11. hcup-us.ahrq.gov/reports/methods/2003_04.pdf
    January 01, 2003 - the SID databases contain nearly all discharges from nearly all hospitals in the state, we treat the samples … We consider the SID to be samples from a “super-population” for purposes of variance estimation. … SID databases contain nearly all discharges from nearly all hospitals in the state, we treat the samples … We consider the NIS and SID to be samples from a “super- population” for purposes of variance estimation
  12. MAINTAIN AND EXPAND (pdf file)

    hcup-us.ahrq.gov/db/nation/kid/reports/KID_2003_Design_Edited_013006.pdf
    January 01, 2003 - Standard formulas for stratified, two-stage cluster samples without replacement may be used to calculate
  13. hcup-us.ahrq.gov/db/nation/nis/nisfilespecs.jsp
    November 01, 2024 - NIS File Specifications An official website of the Department of Health & Human Services Search All AHRQ Websites Careers Contact Us Espanol FAQs Email Updates …
  14. hcup-us.ahrq.gov/db/nation/nis/nissummstats.jsp
    November 01, 2024 - The following links provide summary statistics for the National (Nationwide) Inpatient Sample (NIS). Summary Statistics include means on all numeric variables, frequency distributions, and univariates on continuous variables. Summary statistics are provided by year. Contents: 2022 NIS 2021 NIS 2020…
  15. 2017-01 (pdf file)

    hcup-us.ahrq.gov/reports/methods/2017-01.pdf
    January 01, 2017 - superpopulation model, procedures have been developed to draw inferences using weights from complex samples
  16. hcup-us.ahrq.gov/db/nation/nass/NASSIntroduction2022.pdf
    December 01, 2024 - Introduction to the NASS, 2022 HEALTHCARE COST AND UTILIZATION PROJECT — HCUP A FEDERAL-STATE-INDUSTRY PARTNERSHIP IN HEALTH DATA Sponsored by the Agency for Healthcare Research and Quality INTRODUCTION TO THE HCUP NATIONWIDE AMBULATORY SURGERY SAMPLE (NASS) 2022 These pages pr…
  17. hcup-us.ahrq.gov/tech_assist/index_mno.jsp
    August 01, 2020 - HCUP-US Index Page An official website of the Department of Health & Human Services Search All AHRQ Websites Careers Contact Us Espanol FAQs Email Updates …
  18. hcup-us.ahrq.gov/db/nation/neds/NEDSIntroduction2022.pdf
    November 01, 2024 - Introduction to the NEDS HEALTHCARE COST AND UTILIZATION PROJECT — HCUP A FEDERAL-STATE-INDUSTRY PARTNERSHIP IN HEALTH DATA Sponsored by the Agency for Healthcare Research and Quality INTRODUCTION TO THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS) 2022 Please read all documen…
  19. hcup-us.ahrq.gov/reports/infographics.jsp
    October 01, 2022 - HCUP Infographics An official website of the Department of Health & Human Services Search All AHRQ Websites Careers Contact Us Espanol FAQs Email Updates …
  20. hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2007.jsp
    January 01, 2007 - THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2007 (Version 1) An official website of the Department of Health & Human Services Search All AHRQ Websites Careers Contact Us Es…

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