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  1. digital.ahrq.gov/sites/default/files/docs/citation/r21hs021544-zhou-final-report-2014.pdf
    January 01, 2014 - To assess the system performance, we randomly selected two samples of patients who visited the two clinics … To assess the system performance, we selected two randomized patients’ samples who visited the two clinics
  2. digital.ahrq.gov/sites/default/files/docs/publication/uc1hs015052-stuen-final-report-2008.pdf
    January 01, 2008 - Paired samples t-tests were conducted to determine if there were significant changes from pre- to post-service … Paired samples t-tests for provider ratings showed a similar trend with significantly higher provider
  3. hcup-us.ahrq.gov/news/exhibit_booth/neds_brochure.jsp
    May 01, 2018 - Nationwide Emergency Department Sample (NEDS) An official website of the Department of Health & Human Services Search All AHRQ Websites Careers Contact Us Espanol FAQs Email…
  4. hcup-us.ahrq.gov/news/exhibit_booth/nis_brochure.jsp
    May 01, 2018 - National (Nationwide) Inpatient Sample (NIS) An official website of the Department of Health & Human Services Search All AHRQ Websites Careers Contact Us Espanol FAQs Email …
  5. hcup-us.ahrq.gov/db/nation/nass/NASSIntroduction2021.pdf
    April 01, 2024 - Introduction To The HCUP Nationwide Ambulatory Surgery Sample 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) 2021 …
  6. hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2009.jsp
    January 01, 2009 - However, these NIS samples were not designed to yield a representative sample of hospitals at the State … The two samples could be combined to form a single, generalizable 20% subsample of discharges. … an equal probability of selection for the sample, regardless of whether they appeared in prior NIS samples … This deviates from the procedure used for earlier samples, which maximized the longitudinal component … For a description of zero-weight hospitals in the 1988-1992 samples, refer to the special report: Design
  7. hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_2003_SummaryStats_10PCT_SAMPLE_A.PDF
    January 01, 2003 - please refer to the section on Description of Data Elements. For more information about the coding of HCUP data elements, please refer to the section on Description of Data Elements. For more information about the coding of HCUP data elements, HCUP Summary Statistics Report: NIS 2003 - 10PCT_SAMPLE_A File 1 Means o…
  8. hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_2004_SummaryStats_10PCT_SAMPLE_A.PDF
    January 01, 2004 - please refer to the section on Description of Data Elements. For more information about the coding of HCUP data elements, please refer to the section on Description of Data Elements. For more information about the coding of HCUP data elements, HCUP Summary Statistics Report: NIS 2004 - 10PCT_SAMPLE_A File 1 Means o…
  9. hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_2001_SummaryStats_10PCT_SAMPLE_A.PDF
    January 01, 2001 - please refer to the section on Description of Data Elements. For more information about the coding of HCUP data elements, please refer to the section on Description of Data Elements. For more information about the coding of HCUP data elements, HCUP Summary Statistics Report: NIS 2001 - 10PCT_SAMPLE_A File 1 Means o…
  10. hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_2002_SummaryStats_10PCT_SAMPLE_A.PDF
    January 01, 2002 - please refer to the section on Description of Data Elements. For more information about the coding of HCUP data elements, please refer to the section on Description of Data Elements. For more information about the coding of HCUP data elements, HCUP Summary Statistics Report: NIS 2002 - 10PCT_SAMPLE_A File 1 Means o…
  11. hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_2000_SummaryStats_10PCT_SAMPLE_A.PDF
    January 01, 2000 - please refer to the section on Description of Data Elements. For more information about the coding of HCUP data elements, please refer to the section on Description of Data Elements. For more information about the coding of HCUP data elements, HCUP Summary Statistics Report: NIS 2000 - 10PCT_SAMPLE_A File 1 Means o…
  12. hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2004_10PCT_SAMPLE_A.TXT
    January 01, 2004 - Data Set Name: NIS_2004_10PCT_SAMPLE_A Number of Observations: 800457 Total Record Length: 506 Total Number of Variables: 126 Columns Description: ======= ============ 1- 3 Database name 5- 8 Discharge year of data 10- 25 File name 27- 29 Variable number 31- 59 Variable name 61- 63 …
  13. hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2002_10PCT_SAMPLE_A.TXT
    January 01, 2002 - Data Set Name: NIS_2002_10PCT_SAMPLE_A Number of Observations: 785398 Total Record Length: 490 Total Number of Variables: 116 Columns Description: ======= ============ 1- 3 Database name 5- 8 Discharge year of data 10- 25 File name 27- 29 Variable number 31- 49 Variable name 51- 53 …
  14. hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_2001_10PCT_SAMPLE_B.TXT
    January 01, 2001 - Data Set Name: NIS_2001_10PCT_SAMPLE_B Number of Observations: 745273 Total Record Length: 483 Total Number of Variables: 115 Columns Description: ======= ============ 1- 3 Database name 5- 8 Discharge year of data 10- 25 File name 27- 29 Variable number 31- 49 Variable nam…
  15. hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2003_10PCT_SAMPLE_A.TXT
    January 01, 2003 - Data Set Name: NIS_2003_10PCT_SAMPLE_A Number of Observations: 797773 Total Record Length: 505 Total Number of Variables: 126 Columns Description: ======= ============ 1- 3 Database name 5- 8 Discharge year of data 10- 25 File name 27- 29 Variable number 31- 59 Variable name 61- 63 …
  16. www.ahrq.gov/sites/default/files/wysiwyg/research/findings/nhqrdr/2018qdr-datasources.pdf
    October 01, 2019 - The plan samples are not adjusted for unequal probabilities of selection. … NHAMCS uses a 4-stage probability design that involves samples of primary sampling units (PSUs), hospitals … Population Targeted NHANES samples the U.S. civilian noninstitutionalized resident population of the … local geographic areas (which together make up the United States), the NIS draws independent quarterly samples … Schedule Quarterly samples, reported annually.
  17. www.ahrq.gov/sites/default/files/wysiwyg/research/findings/nhqrdr/2022qdr-datasources.pdf
    December 01, 2022 - The plan samples are not adjusted for unequal probabilities of selection. … Population Targeted NHANES samples the noninstitutionalized civilian resident population of the United … NHAMCS uses a 4-stage probability design that involves samples of primary sampling units (PSUs), hospitals … local geographic areas (which together make up the United States), NIS draws independent quarterly samples … Data Collection Schedule Quarterly samples, reported annually Geographic Estimates National, state
  18. hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2008.jsp
    January 01, 2008 - However, these NIS samples were not designed to yield a representative sample of hospitals at the State … The two samples could be combined to form a single, generalizable 20% subsample of discharges. … an equal probability of selection for the sample, regardless of whether they appeared in prior NIS samples … This deviates from the procedure used for earlier samples, which maximized the longitudinal component … For a description of zero-weight hospitals in the 1988-1992 samples, refer to the special report: Design
  19. hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2007.jsp
    January 01, 2007 - However, these NIS samples were not designed to yield a representative sample of hospitals at the State … The two samples could be combined to form a single, generalizable 20% subsample of discharges. … an equal probability of selection for the sample, regardless of whether they appeared in prior NIS samples … This deviates from the procedure used for earlier samples, which maximized the longitudinal component … For a description of zero-weight hospitals in the 1988-1992 samples, refer to the special report: Design
  20. www.ahrq.gov/ncepcr/tools/transform-qi/deliver-facilitation/modules/resources.html
    July 01, 2022 - This article from the British Medical Journal on the value of small samples sizes in rapid-cycle