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  1. hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2015_Core.TXT
    January 01, 2015 - Data Set Name: NIS_2015_CORE Number of Observations: 7153989 Total Record Length: 86 Total Number of Data Elements: 24 Columns Description ======= =========== 1- 3 Database name 5- 8 Discharge year of data 10- 35 File name 37- 39 Data element number 41- 69 Data element name 7…
  2. hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_1999_HOSPITALv2.TXT
    January 01, 1999 - Data Set Name: NIS_1999_HOSPITAL Number of Observations: 984 Total Record Length: 173 Total Number of Variables: 23 Columns Description: ======= ============ 1- 3 Database name 5- 8 Discharge year of data 10- 17 File name 19- 21 Variable number 23- 41 Variable name 4…
  3. hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_1999_HOSPITAL.TXT
    January 01, 1999 - Data Set Name: NIS_1999_HOSPITAL Number of Observations: 984 Total Record Length: 173 Total Number of Variables: 23 Columns Description: ======= ============ 1- 3 Database name 5- 8 Discharge year of data 10- 17 File name 19- 21 Variable number 23- 41 Variable name 4…
  4. hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2003_HOSPITAL.TXT
    January 01, 2003 - Data Set Name: NIS_2003_HOSPITAL Number of Observations: 994 Total Record Length: 178 Total Number of Variables: 24 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 Star…
  5. hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2002_HOSPITAL.TXT
    January 01, 2002 - Data Set Name: NIS_2002_HOSPITAL Number of Observations: 995 Total Record Length: 178 Total Number of Variables: 24 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 Star…
  6. hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_1998_HOSPITAL.TXT
    January 01, 1998 - Data Set Name: NIS_1998_HOSPITAL Number of Observations: 984 Total Record Length: 173 Total Number of Variables: 23 Columns Description: ======= ============ 1- 3 Database name 5- 8 Discharge year of data 10-17 File name 19-21 Variable number 23-41 Variable name 4…
  7. hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_2001_HOSPITAL.TXT
    January 01, 2001 - Data Set Name: NIS_2001_HOSPITAL Number of Observations: 986 Total Record Length: 173 Total Number of Variables: 23 Columns Description: ======= ============ 1- 3 Database name 5- 8 Discharge year of data 10- 25 File name 27- 29 Variable number 31- 49 Variable name 5…
  8. hcup-us.ahrq.gov/db/nation/nrd/NRD_Introduction_2010-2014.jsp
    January 01, 2014 - Admissions (NRD_DaysToEvent and LOS) NRD_DaysToEvent is the number of days from a randomly chosen "start … Each verified patient linkage number (NRD_VisitLink) was assigned a unique start date that was used to … The data element NRD_DaysToEvent was the difference between the visit's admission date and the start … For readmission analyses, determining the number of days between the end of one admission and the start … The number of days between the admissions (from discharge date of the first admission to the start
  9. hcup-us.ahrq.gov/news/exhibit_booth/HCUPOverviewDeck_121422.pdf
    February 09, 2022 - Description Number of categories More than 530 CCSR categories Category naming convention Categories start … Description Number of categories More than 320 CCSR categories Category naming convention Categories start
  10. hcup-us.ahrq.gov/db/state/siddist/siddist_filecompnd.jsp
    August 01, 2025 - SID File Composition - North Dakota An official website of the Department of Health & Human Services Search All AHRQ Websites Careers Contact Us Espanol FAQs Email Updates …
  11. hcup-us.ahrq.gov/db/state/siddist/siddist_filecompde.jsp
    June 01, 2024 - SID File Composition - Delaware An official website of the Department of Health & Human Services Search All AHRQ Websites Careers Contact Us Espanol FAQs Email Updates …
  12. hcup-us.ahrq.gov/db/nation/nass/nasscorrections_2022.jsp
    January 01, 2022 - 2021 NASS Known Data Issues An official website of the Department of Health & Human Services Search All AHRQ Websites Careers Contact Us Espanol FAQs Email Updates …
  13. hcup-us.ahrq.gov/db/nation/neds/nedscorrections_2022.jsp
    January 01, 2022 - 2022 NEDS Known Data Issues 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/nrd/Introduction_NRD_2010-2016.pdf
    January 01, 2016 - Admissions (NRD_DaysToEvent and LOS) NRD_DaysToEvent is the number of days from a randomly chosen "start … Each verified patient linkage number (NRD_VisitLink) was assigned a unique start date that was used … The data element NRD_DaysToEvent was the difference between the visit’s admission date and the start … For readmission analyses, determining the number of days between the end of one admission and the start … • The number of days between the admissions (from discharge date of the first admission to the start
  15. hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2006_Hospital.TXT
    January 01, 2006 - Data Set Name: NIS_2006_HOSPITAL Number of Observations: 1045 Total Record Length: 185 Total Number of Data Elements: 25 Columns Description ======= =========== 1- 3 Database name 5- 8 Discharge year of data 10- 25 File name 27- 29 Data element number 31- 59 Data element name 61-…
  16. hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2005_Hospital.TXT
    January 01, 2005 - Data Set Name: NIS_2005_HOSPITAL Number of Observations: 1054 Total Record Length: 185 Total Number of Data Elements: 25 Columns Description: ======= ============ 1- 3 Database name 5- 8 Discharge year of data 10- 25 File name 27- 29 Data element number 31- 59 Data element name 6…
  17. hcup-us.ahrq.gov/db/nation/nis/tools/stats/NIS_2000_HOSPITAL.TXT
    January 01, 2000 - Data Set Name: NIS_2000_HOSPITAL Number of Observations: 994 Total Record Length: 183 Total Number of Variables: 24 Columns Description: ======= ============ 1- 3 Database name 5- 8 Discharge year of data 10- 25 File name 27- 29 Variable number 31- 49 Variable name 5…
  18. hcup-us.ahrq.gov/db/nation/nis/tools/stats/FileSpecifications_NIS_2004_HOSPITAL.TXT
    January 01, 2004 - Data Set Name: NIS_2004_HOSPITAL Number of Observations: 1004 Total Record Length: 185 Total Number of Variables: 25 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 Sta…
  19. hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2018.jsp
    January 01, 2018 - discharge would be selected from the sorted list of discharges, beginning with a randomly selected start
  20. hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2019.jsp
    January 01, 2019 - discharge would be selected from the sorted list of discharges, beginning with a randomly selected start

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