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221. NIS Database Documentation - Corrections 1998-1999
     hcup-us.ahrq.gov/db/nation/nis/corrections_1998_1999.jsp
     January 01, 1998 - NIS Database Documentation - Corrections 1998-1999 An official website of the Department of Health & Human Services Search All AHRQ Websites Careers Contact Us Espanol FAQs …

222. Healthcare Cost and Utilization Project (HCUP) NIS Notes
     hcup-us.ahrq.gov/db/vars/prdayn/nisnote.jsp
     September 01, 2008 - Pennsylvania In 1992, Pennsylvania data contained many out-of-range procedure days due to a processing error … Also in 1995, a data processing error in the source data resulted in a number of records with procedure

223. Healthcare Cost and Utilization Project (HCUP) KID Notes
     hcup-us.ahrq.gov/db/vars/prdayn/kidnote.jsp
     September 01, 2008 - Pennsylvania In 1992, Pennsylvania data contained many out-of-range procedure days due to a processing error … Also in 1995, a data processing error in the source data resulted in a number of records with procedure

224. Healthcare Cost and Utilization Project (HCUP) NEDS Notes
     hcup-us.ahrq.gov/db/vars/aweekend/nedsnote.jsp
     May 01, 2015 - From data year 1998 to 2000, there may be an error in AWEEKEND.

225. HCUP Central Distributor User Guide (pdf file)
     hcup-us.ahrq.gov/pdf/HCUP_Central_Distributor_User_Guide.pdf
     January 01, 2024 - the built-in zip utilities in Windows® (Windows Explorer) or Mac (Archive Utility) will produce an error … Central Disributor User Guide | January 2024 If your download link has expired, you have received an error … the built-in zip utilities in Windows® (Windows Explorer) or Mac (Archive Utility) will produce an error … Troubleshooting Password Issues If you are receiving a password error, please first ensure you are … During the unzip/extraction process, error messages about corrupted files, folder errors, or incorrect

226. Neds 2014 Maskedstats Core Weighted (pdf file)
     hcup-us.ahrq.gov/db/nation/neds/stats/NEDS_2014_MaskedStats_Core_Weighted.PDF
     January 01, 2014 - 1, 2016 2 Means of Continuous Data Elements Statistics Variable Label N N Miss Min Max Mean Std Error … 1, 2016 3 Means of Continuous Data Elements Statistics Variable Label N N Miss Min Max Mean Std Error … 1, 2016 4 Means of Continuous Data Elements Statistics Variable Label N N Miss Min Max Mean Std Error … 1, 2016 5 Means of Continuous Data Elements Statistics Variable Label N N Miss Min Max Mean Std Error … 1, 2016 6 Means of Continuous Data Elements Statistics Variable Label N N Miss Min Max Mean Std Error

227. Exhibit 2.5 Circulatory Conditions
     hcup-us.ahrq.gov/reports/factsandfigures/figures/2005/2005_2_5a.jsp
     January 01, 2005 - Exhibit 2.5 Circulatory Conditions Exhibit 2.5 Circulatory Conditions Number of Discharges, Percent Distribution, and Rank for the Most Frequent Principal Diagnoses of Circulatory Conditions by Sex, 2005 Principal Diagnosis CCS Condition Category and Name Total* Male Female Discharges…

228. Neds 2017 Core Maskedstats (pdf file)
     hcup-us.ahrq.gov/db/nation/neds/stats/NEDS_2017_Core_MaskedStats.PDF
     January 01, 2017 - Kurtosis 24.952278 Uncorrected SS 657588298 Corrected SS 31702681 Coeff Variation 22.5061141 Std Error … Kurtosis -0.9297541 Uncorrected SS 7.66454E10 Corrected SS 2.00845E10 Coeff Variation 59.589758 Std Error … Kurtosis 148.183939 Uncorrected SS 1.46439E15 Corrected SS 1.00547E15 Coeff Variation 148.017603 Std Error

229. Kid 2022 Maskedstats Core Weighted (pdf file)
     hcup-us.ahrq.gov/db/nation/kid/tools/stats/KID_2022_MaskedStats_Core_Weighted.PDF
     January 01, 2022 - Observations 3009812 Sum of Weights 5660863.33 Statistics Variable Label N Minimum Maximum Mean Std Error … of Mean Sum Std Error of Sum AGE Age in years at admission 3,009,812 0.00 20.00 3.68 0.06 20,830,228 … 5, 2024 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 44,162 -4.00 359.00 … of Mean Sum Std Error of Sum PRDAY21 Number of days from admission to I10_PR21 4,687 -2.00 367.00

230. INTRODUCTION TO THE HCUP NATIONAL INPATIENT SAMPLE (NIS), 2021
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2021.jsp
     January 01, 2021 - The self-weighting design of the new NIS reduces the margin of error for estimates and delivers … For national-level estimates, the 2012 NIS systematic design reduces the margin of error by 42 to … The margin of error is commonly used by the popular press to describe the reliability of sample … The systematic design also consistently reduced the margin of error for estimates at the DRG level … As such, there may be some measurement error in the identification of cases.

231. Microsoft Word - MS2012-01 Population Denominator Data _Updated through 2010 population_.doc (pdf file)
     hcup-us.ahrq.gov/reports/methods/2012_01.pdf
     January 01, 2012 - 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

232. 2017-01 (pdf file)
     hcup-us.ahrq.gov/reports/methods/2017-01.pdf
     January 01, 2017 - Standard error calculations should take into account the poststratification weights and clustering of … Output for 30-day All-Cause AMI Readmissions Analytic Sample Software Mean Standard Error Sum Standard … Error All NRD discharges SAS 0.001918 4.1 x 10-5 67,717 1,624.8 Stata 0.001918 4.1 x 10-5 67,717 … Unbiased estimates of error variance then are obtained by comparing the actual values to the predicted

233. Neds 2022 Core Maskedstats Weighted (pdf file)
     hcup-us.ahrq.gov/db/nation/neds/stats/NEDS_2022_Core_MaskedStats_Weighted.PDF
     January 01, 2022 - Core File 15:48 Tuesday, November 5, 2024 3 Means of Continuous Data Elements Statistics Mean Std Error … Core File 15:48 Tuesday, November 5, 2024 5 Means of Continuous Data Elements Statistics Mean Std Error

234. Neds 2021 Core Maskedstats Weighted (pdf file)
     hcup-us.ahrq.gov/db/nation/neds/stats/NEDS_2021_Core_MaskedStats_Weighted.PDF
     January 01, 2021 - 2021 Core File 18:25 Friday, March 1, 2024 3 Means of Continuous Data Elements Statistics Mean Std Error … 2021 Core File 18:25 Friday, March 1, 2024 5 Means of Continuous Data Elements Statistics Mean Std Error

235. Exhibit 2.3 Most Frequent Diagnoses by Sex
     hcup-us.ahrq.gov/reports/factsandfigures/figures/2005/2005_2_3.jsp
     January 01, 2005 - Exhibit 2.3 Most Frequent Diagnoses by Sex Exhibit 2.3 Most Frequent Diagnoses by Sex Number of Discharges,* Percent Distribution, and Rank of Most Frequent Principal Diagnoses for Inpatient Hospital Stays by Sex, 2005 Principal Diagnosis CCS Condition Category and Name Males Females Numb…

236. Title: (pdf file)
     hcup-us.ahrq.gov/datainnovations/NWAbstractFinal.pdf
     September 29, 2013 - Title: States: Idaho, Oregon, Washington Title: Improving Data & Enhancing Access—(IDEA) Principal Investigator: Victoria Warren-Mears Organization: Northwest Portland Area Indian Health Board Project Dates: September 30, 2010, to September 29, 2013 Grant Number: R01 HS19972-01 Correctly assessing th…

237. Statistical Brief #88: Trends in Uninsured Hospital Stays, 1998-2007 (pdf file)
     hcup-us.ahrq.gov/reports/statbriefs/sb88.pdf
     March 01, 2010 - 37,800 2.2% 39,100 1.7% 963,900 2.4% * Statistics based on estimates with a relative standard error … (standard error/weighted estimate) greater than 0.30 or with standard error = 0 in the nationwide statistics

238. Introduction to the NIS (pdf file)
     hcup-us.ahrq.gov/db/nation/nis/NISIntroduction2022.pdf
     November 01, 2024 - • The self-weighting design of the new NIS reduces the margin of error for estimates and delivers … For national-level estimates, the 2012 NIS systematic design reduces the margin of error by 42 to 48 … The systematic design also consistently reduced the margin of error for estimates at the DRG level. … As such, there may be some measurement error in the identification of cases. … Unbiased estimates of error variance are then obtained by comparing the actual values to the predicted

239. 2015 01 (pdf file)
     hcup-us.ahrq.gov/reports/methods/2015_01.pdf
     January 01, 2015 - s Rules, the M estimates are pooled to form a single estimate for each parameter and its standard error … The idea is to estimate the regression coefficients and the error variance for a regression model. … The errors are assumed to be normally distributed so that the regression coefficients and the error … The standard error estimated from the imputed data was $226, which was $37 less than the estimate of … Pooled std error Original p-value Pooled p-value Intercept 8.688 8.668 0.3852 0.3819 <

240. Checklist for Working with the KID
     hcup-us.ahrq.gov/db/nation/kid/kidchecklist.jsp
     September 01, 2025 - Standard error calculations should take into account the stratification (data element KID_STRATUM) and