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  1. hcup-us.ahrq.gov/reports/statbriefs/sb19.pdf
    November 01, 2006 - Note: Statistics based on estimates with a relative standard error (standard error/weighted estimate) … greater than 0.30 or with standard error = 0 are not reliable.
  2. hcup-us.ahrq.gov/db/vars/dxccsn/nisnote.jsp
    September 01, 2008 - EAGE05, EDX03   Top     State Specific Notes Massachusetts Due to an error
  3. hcup-us.ahrq.gov/reports/factsandfigures/figures/2005/2005_5_1B.jsp
    January 01, 2005 - Exhibit 5.1. Uninsured Inpatient Hospital Stays: Admission Source and Discharge Status Exhibit 5.1. Uninsured Inpatient Hospital Stays: Admission Source and Discharge Status Share of Uninsured and Insured Stays by Discharges Status, 2005 Admission Source and Discharge Status Total-All Discharges…
  4. hcup-us.ahrq.gov/reports/factsandfigures/figures/2005/2005_2_11a.jsp
    January 01, 2005 - Exhibit 2.11. Influenza Exhibit 2.11. Influenza Characteristics of All Hospital Stays and Stays with a Principal Diagnosis of Influenza, 2005 Characteristics All Hospital Stays Hospital Stays for Influenza Discharges Number of discharges in thousands 39,163.8 50.0 Number of…
  5. hcup-us.ahrq.gov/reports/methods/2015_02.pdf
    January 01, 2015 - There is no sampling error associated with Nielsen census population counts; therefore, appropriate … QI estimates were included in the QDR if they reached a threshold defined by a relative standard error … For population counts based on Nielsen data, there is no sampling error. … We multiplied this standard error by 1,000. b. … Standard error estimates for age/sex adjusted inpatient rates per 1,000 discharges using inpatient
  6. hcup-us.ahrq.gov/reports/methods/2017-03.pdf
    January 01, 2017 - There is no sampling error associated with Claritas HCUP (07/13/17) Methods for HCUP Data in 2016 … QI estimates were included in the QDR if they reached a threshold defined by a relative standard error … For population counts based on Claritas data, there is no sampling error. … We multiplied this standard error by 1,000. b. … Standard error estimates for age/sex adjusted inpatient rates per 1,000 discharges using inpatient
  7. hcup-us.ahrq.gov/reports/methods/2016-01.pdf
    January 01, 2016 - There is no sampling error associated with Nielsen HCUP (11/20/15) Methods for HCUP Data in 2015 … QI estimates were included in the QDR if they reached a threshold defined by a relative standard error … For population counts based on Nielsen data, there is no sampling error. … We multiplied this standard error by 1,000. b. … Standard error estimates for age/sex adjusted inpatient rates per 1,000 discharges using inpatient
  8. hcup-us.ahrq.gov/reports/methods/2018-01.pdf
    January 01, 2018 - There is no sampling error associated with Claritas census population counts. … QI estimates were included in the QDR if they reached a threshold defined by a relative standard error … For population counts based on Claritas data, there is no sampling error. … We multiplied this standard error by 1,000. b. … Standard error estimates for age/sex adjusted inpatient rates per 1,000 discharges using inpatient
  9. MS-2019-02 (pdf file)

    hcup-us.ahrq.gov/reports/methods/2019-02.pdf
    January 01, 2019 - For population counts based on Census data, there is no sampling error. … Step-By-Step Example Consider the following example of calculating a population-based rate and standard error … There is no error associated with the Census population count. … For this example, call the population count "ADULT_US_POP" Step 4: Calculate rate and standard error … Calculate the population-based rate per 100,000 population and the standard error of the rate as follows
  10. hcup-us.ahrq.gov/reports/factsandfigures/figures/2005/2005_3_4.jsp
    January 01, 2005 - Exhibit 3.4. Cardiovascular Procedures Number of Inpatient Hospital Cardiovascular Procedures, 1993-2005 Year All-listed Procedures CABG (coronary artery bypass graft)* PTCA (percutaneous transluminal coronary angioplasty)** Endarterectomy*** Abdominal Aortic Aneurysm Repair 1993 …
  11. hcup-us.ahrq.gov/reports/trendtables/HCUPSummaryTrendTables_Methods.xlsx
    December 01, 2022 - equal to 10, representing fewer than two hospitals (State tables only), or with a relative standard error … less than 30, representing fewer than two hospitals (State tables only), or with a relative standard error … than 30, or representing fewer than two hospitals (State tables only), or with a relative standard error … than 30, or representing fewer than two hospitals (State tables only), or with a relative standard error … than 30, or representing fewer than two hospitals (State tables only), or with a relative standard error
  12. hcup-us.ahrq.gov/reports/factsandfigures/figures/2005/2005_3_6B.jsp
    January 01, 2005 - Exhibit 3.6. Orthopedic Procedures Exhibit 3.6. Orthopedic Procedures Growth in Discharges with Procedures on the Musculoskeletal System, 1993-2005 CCS Procedure Category and Name (All-listed Procedures) Number of Discharges with a Procedure Percent Growth in Discharges with a Procedure from 199…
  13. hcup-us.ahrq.gov/db/vars/aweekend/nisnote.jsp
    September 01, 2008 - From data year 1998 to 2000, there may be an error in AWEEKEND.
  14. hcup-us.ahrq.gov/db/nation/nis/tools/stats/MaskedStats_NIS_2019_Core_Weighted.PDF
    January 01, 2019 - Observations 7083805 Sum of Weights 35419023 Statistics Variable Label N Minimum Maximum Mean Std Error … of Mean Sum Std Error of Sum AGE Age in years at admission 7,083,547 0.00 90.00 50.15 0.20 1,776,075,884 … 24, 2021 2 Means of Continuous Data Elements Statistics Variable Label N Minimum Maximum Mean Std Error … of Mean Sum Std Error of Sum PCLASS_ORPROC Indicates operating room (major diagnostic or therapeutic … of Mean Sum Std Error of Sum PRDAY23 Number of days from admission to I10_PR23 6,270 -3.00 324.00
  15. hcup-us.ahrq.gov/db/nation/kid/tools/stats/KID_2019_MaskedStats_Core_Weighted.PDF
    January 01, 2019 - Observations 3089283 Sum of Weights 5902538.38 Statistics Variable Label N Minimum Maximum Mean Std Error … of Mean Sum Std Error of Sum AGE Age in years at admission 3,089,283 0.00 20.00 3.95 0.06 23,315,676 … 31, 2021 2 Means of Continuous Data Elements Statistics Variable Label N Minimum Maximum Mean Std Error … of Mean Sum Std Error of Sum PRDAY9 Number of days from admission to I10_PR9 42,456 -4.00 365.00 … of Mean Sum Std Error of Sum PRDAY21 Number of days from admission to I10_PR21 3,838 -2.00 358.00
  16. hcup-us.ahrq.gov/db/nation/kid/tools/stats/KID_2019_MaskedStats_Core_Weighted_V2.PDF
    January 01, 2019 - Observations 3089283 Sum of Weights 5902538.38 Statistics Variable Label N Minimum Maximum Mean Std Error … of Mean Sum Std Error of Sum AGE Age in years at admission 3,089,283 0.00 20.00 3.95 0.06 23,315,676 … 2, 2022 2 Means of Continuous Data Elements Statistics Variable Label N Minimum Maximum Mean Std Error … of Mean Sum Std Error of Sum PRDAY9 Number of days from admission to I10_PR9 42,456 -4.00 365.00 … of Mean Sum Std Error of Sum PRDAY21 Number of days from admission to I10_PR21 3,838 -2.00 358.00
  17. hcup-us.ahrq.gov/db/nation/nis/tools/stats/MaskedStats_NIS_2021_Core_Weighted.PDF
    January 01, 2021 - Observations 6666752 Sum of Weights 33333720 Statistics Variable Label N Minimum Maximum Mean Std Error … of Mean Sum Std Error of Sum AGE Age in years at admission 6,666,498 0.00 90.00 49.8089 0.1974 1,660,252,156 … 28, 2023 2 Means of Continuous Data Elements Statistics Variable Label N Minimum Maximum Mean Std Error … of Mean Sum Std Error of Sum ELECTIVE Elective versus non-elective admission 6,656,852 0.00 1.00 … of Mean Sum Std Error of Sum PRDAY9 Number of days from admission to I10_PR9 151,425 -4.00 345.00
  18. hcup-us.ahrq.gov/db/nation/nis/tools/stats/MaskedStats_NIS_2019_Core_Weighted_V2.PDF
    January 01, 2019 - Observations 7083805 Sum of Weights 35419023 Statistics Variable Label N Minimum Maximum Mean Std Error … of Mean Sum Std Error of Sum AGE Age in years at admission 7,083,547 0.00 90.00 50.15 0.20 1,776,075,884 … 2, 2022 2 Means of Continuous Data Elements Statistics Variable Label N Minimum Maximum Mean Std Error … of Mean Sum Std Error of Sum PCLASS_ORPROC Indicates operating room (major diagnostic or therapeutic … of Mean Sum Std Error of Sum PRDAY23 Number of days from admission to I10_PR23 6,270 -3.00 324.00
  19. hcup-us.ahrq.gov/db/nation/nis/tools/stats/MaskedStats_NIS_2022_Core_Weighted.PDF
    January 01, 2022 - Observations 6578372 Sum of Weights 32891849 Statistics Variable Label N Minimum Maximum Mean Std Error … 25, 2024 2 Means of Continuous Data Elements Statistics Variable Label N Minimum Maximum Mean Std Error … of Mean Sum Std Error of Sum FEMALE Indicator of sex 6,576,958 0.00 1.00 0.5537 0.0011 18,208,318 … of Mean Sum Std Error of Sum PAY1 Primary expected payer (uniform) 6,568,727 1.00 6.00 2.0986 0.0059 … of Mean Sum Std Error of Sum PRDAY22 Number of days from admission to I10_PR22 9,872 -3.00 347.00
  20. hcup-us.ahrq.gov/reports/statbriefs/sb19.jsp
    May 19, 2016 - Note: Statistics based on estimates with a relative standard error (standard error/weighted estimate) … greater than 0.30 or with standard error = 0 are not reliable.

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