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1. Standard Errors
   hcup-us.ahrq.gov/tech_assist/standarderrors/interactive/index.html
   March 06, 2024 - Standard Errors Enable Javascript support in the browser.

2. HCUP Calculating Standard Errors - Accessible Version
   hcup-us.ahrq.gov/tech_assist/standarderrors/508/508course_2016.jsp
   January 01, 2016 - HCUP Calculating Standard Errors - Accessible Version … About HCUP Learning Objectives Standard Errors Importance of Calculating Standard Errors … errors. … They MUST be used when calculating national estimates, regional estimates and standard errors. … Does calculating standard errors for a subset of discharges differ from calculating standard errors for

3. Microsoft Word - NISVarianceReport_Notification.doc (pdf file)
   hcup-us.ahrq.gov/db/nation/nis/reports/NISVarianceReport_Notification.pdf
   July 01, 2004 - Inpatient Database (KID) SUBJECT: Corrections to instructions on how to calculate variances (standard errors … Incorrect standard errors will be produced if a hospital gets eliminated from the sample in the process … For example, if every hospital treated at least one cystic fibrosis patient, then the standard errors … However, the standard errors will be incorrect if the NIS was subset to only those patients treated … You may well wonder how erroneous the standard errors were that you may have produced by subsetting

4. NIS Database Documentation - Corrections 1994-1997
   hcup-us.ahrq.gov/db/nation/nis/corrections_1994_1997.jsp
   January 01, 1994 - Correction to SPSS Label Program Correction to Instruction on How to Calculate Variances (Standard Errors … This program contains errors and should not be used. … Return to Contents   Correction to Instruction on How to Calculate Variances (Standard Errors) … Click to view the Correction to Instruction on How to Calculate Variances (Standard Errors).

5. NIS Database Documentation - Corrections 1993
   hcup-us.ahrq.gov/db/nation/nis/corrections_1993.jsp
   January 01, 1993 - Return to Contents   Correction to 1993 Weights file MEDSTAT discovered the following errors … We have an updated version of the weight file that corrects the above errors. … This program contains errors and should not be used. … Return to Contents   Correction to Instruction on How to Calculate Variances (Standard Errors) … Click to view the Correction to Instruction on How to Calculate Variances (Standard Errors) (PDF

6. Calculating National Inpatient Sample (NIS) Variances for Data Years 2012 and Later (pdf file)
   hcup-us.ahrq.gov/reports/methods/MS2015-09%20Addendum.pdf
   December 10, 2022 - Demonstration of NOMCAR Option In this section we demonstrate the effect on standard errors when using … with the use of NOMCAR: The following SAS code produces estimates of the sums, means, and standard errors … • The standard errors for the data elements ALLCODED and ONEMISSING are identical across the two … • The standard errors using the NOMCAR option are larger for the data element HOSPMISSING because … /* Obtain estimates: The following SAS code produces estimates of the sums, means, and standard errors

7. Calculating National Inpatient Sample (NIS) Variances for Data Years 2012 and Later (pdf file)
   hcup-us.ahrq.gov/reports/methods/MS2003-02%20Addendum.pdf
   December 10, 2022 - Demonstration of NOMCAR Option In this section we demonstrate the effect on standard errors when using … with the use of NOMCAR: The following SAS code produces estimates of the sums, means, and standard errors … mean, and sum are identical across the three data elements and two PROC SURVEYMEANS. • The standard errors … identical across the two approaches because all hospitals in the NIS are represented. • The standard errors … /* Obtain estimates: The following SAS code produces estimates of the sums, means, and standard errors

8. Calculating Kids’ Inpatient Database (KID) Variances (pdf file)
   hcup-us.ahrq.gov/reports/methods/MS2005-07%20Addendum.pdf
   December 10, 2022 - Demonstration of NOMCAR Option In this section we demonstrate the effect on standard errors when using … with the use of NOMCAR: The following SAS code produces estimates of the sums, means, and standard errors … • The standard errors for the data elements ALLCODED and ONEMISSING are identical across the two … • The standard errors using the NOMCAR option are larger for the data element HOSPMISSING because … /* Obtain estimates: The following SAS code produces estimates of the sums, means, and standard errors

9. NIS Database Documentation - Corrections 1998-1999
   hcup-us.ahrq.gov/db/nation/nis/corrections_1998_1999.jsp
   January 01, 1998 - discharges Incorrect label for region Correction to Instruction on How to Calculate Variances (Standard Errors … Return to Contents   Correction to Instruction on How to Calculate Variances (Standard Errors) … Click to view the Correction to Instruction on How to Calculate Variances (Standard Errors) (PDF

10. Exhibit 1.3. Reasons for Hospital Stays
    hcup-us.ahrq.gov/reports/factsandfigures/figures/2005/2005_1_3b.jsp
    January 01, 2005 - to Principal Diagnosis Number of Discharges (in Thousands) Percent of All Discharges Standard Errors … Number of Discharges (in Thousands) Percent of All Discharges Standard Errors Total Number of … Discharges (in Thousands) Percent of All Discharges Standard Errors   All reasons 39,164

11. Exhibit 1.3. Reasons for Hospital Stays
    hcup-us.ahrq.gov/reports/factsandfigures/figures/2005/2005_1_3a.jsp
    January 01, 2005 - to Principal Diagnosis Number of Discharges (in Thousands) Percent of All Discharges Standard Errors … Number of Discharges (in Thousands) Percent of All Discharges Standard Errors Total Number of … Discharges (in Thousands) Percent of All Discharges Standard Errors   All reasons 39,164

12. Exhibit 2.5 Circulatory Conditions
    hcup-us.ahrq.gov/reports/factsandfigures/figures/2005/2005_2_5a.jsp
    January 01, 2005 - Diagnosis CCS Condition Category and Name Total* Male Female Discharges in Thousands Standard Errors … in Thousands Rank Discharges in Thousands Standard Errors in Thousands Rank for Males Percent … Male Discharges in Thousands Standard Errors in Thousands Rank for Females Percent Female

13. Calculating Variances Using the 1999 Nationwide Inpatient Sample (pdf file)
    hcup-us.ahrq.gov/db/nation/kid/reports/CalculatingKIDVariances.pdf
    December 16, 2005 - and which will yield correct standard errors. … In particular, incorrect standard errors could be produced if a hospital is eliminated from the KID … Standard errors will always be calculated appropriately if all of the KID observations are retained … In addition to the methods shown in this report, standard errors can be estimated by validation and … Standard errors and confidence intervals can then be calculated from the validation data.

14. Calculating Variances Using the 1999 Nationwide Inpatient Sample (pdf file)
    hcup-us.ahrq.gov/reports/methods/2005-07.pdf
    January 01, 2005 - and which will yield correct standard errors. … In particular, incorrect standard errors could be produced if a hospital is eliminated from the KID … Standard errors will always be calculated appropriately if all of the KID observations are retained … In addition to the methods shown in this report, standard errors can be estimated by validation and … Standard errors and confidence intervals can then be calculated from the validation data.

15. NIS Database Documentation - Corrections 1988-1992
    hcup-us.ahrq.gov/db/nation/nis/corrections_1988_1992.jsp
    May 01, 2015 - Correction to SPSS Load Programs Correction to Instruction on How to Calculate Variances (Standard Errors … Return to Contents   Correction to Instruction on How to Calculate Variances (Standard Errors) … Click to view the Correction to Instruction on How to Calculate Variances (Standard Errors) (PDF

16. Exhibit 2.3 Most Frequent Diagnoses by Sex
    hcup-us.ahrq.gov/reports/factsandfigures/figures/2005/2005_2_3.jsp
    January 01, 2005 - CCS Condition Category and Name Males Females Number of Discharges in Thousands Standard Errors … in Thousands Percent of Male Discharges Rank Number of Discharges in Thousands Standard Errors

17. HCUP Methods Series Calculating National Inpatient Sample (NIS) Variances for Data Years 2012 and Later
    hcup-us.ahrq.gov/reports/methods/2015_09.jsp
    January 01, 2015 - This approach generally is recommended for calculating standard errors because it will yield correct … standard errors. … This means that the standard errors reported in the above table would be multiplied by 89.4 percent ( … The standard errors only will be correct if every sample hospital has at least one observation in the … Standard errors and confidence intervals then can be calculated from the validation data.

18. Calculating Variances Using the 1999 Nationwide Inpatient Sample (pdf file)
    hcup-us.ahrq.gov/reports/methods/2015-09.pdf
    January 01, 2015 - This approach generally is recommended for calculating standard errors because it will yield correct … standard errors. … This means that the standard errors reported in the above table would be multiplied by 89.4 percent … Standard errors will be calculated appropriately if all of the NIS observations are retained in the … Standard errors and confidence intervals then can be calculated from the validation data.

19. Calculating Variances Using the 1999 Nationwide Inpatient Sample (pdf file)
    hcup-us.ahrq.gov/reports/methods/2003_02.pdf
    January 01, 2003 - and which will always yield correct standard errors. … This means that the standard errors reported in the above table would be multiplied by 89.4 percent … HCUP NIS (Revised 12/11/15) 18 Calculating NIS Variances The standard errors from a subset will be … Standard errors will always be calculated appropriately if all of the NIS observations are retained … Standard errors and confidence intervals can then be calculated from the validation data.

20. HCUP Methods Series Calculating Nationwide Inpatient Sample (NIS) Variances for Data Years 2011 and Earlier
    hcup-us.ahrq.gov/reports/methods/2003_02.jsp
    January 01, 2003 - and which will always yield correct standard errors. … This means that the standard errors reported in the above table would be multiplied by 89.4 percent ( … For example, if every hospital treated at least one cystic fibrosis patient, then the standard errors … Standard errors will always be calculated appropriately if all of the NIS observations are retained in … Standard errors and confidence intervals can then be calculated from the validation data.