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281. HEALTHCARE COST AND UTILIZATION PROJECT — HCUP (pdf file)
     hcup-us.ahrq.gov/db/nation/nis/NISIntroduction2019.pdf
     September 01, 2021 - hospital volume analysis) can no longer be performed. … The NIS is available yearly, beginning with 1988, allowing analysis of trends over time. … For trends analysis using NIS data 2011 and earlier, revised weights should be used to make estimates … Choosing Data Elements for Analysis • For all data elements you plan to use in your analysis, first … • The NIS is available yearly, beginning with 1988, allowing analysis of trends over time.

282. HCUP Nationwide Inpatient Sample Design Report 2004
     hcup-us.ahrq.gov/db/nation/nis/reports/NIS_2004_Design_Report.jsp
     January 01, 2004 - Login Do Your own analysis Explore Expert Research & Limited … Sampling Frame Final Hospital Sample Subsamples Sample Weights Weight Data Elements Data Analysis … SAMPLE SAMPLE WEIGHTS Hospital Weights Discharge Weights Weight Data Elements DATA ANALYSIS … For example, nearly all SAS (Statistical Analysis System) procedures incorporate weights. … In addition, several statistical analysis programs have been developed to specifically calculate

283. Clinical Classifications Software (CCS) for ICD-9-CM
     hcup-us.ahrq.gov/toolssoftware/ccs/ccs.jsp
     September 01, 2025 - Login Do Your own analysis Explore Expert Research & Limited … special archival version of the single-level CCS for diagnoses is available for users doing longitudinal analysis … National estimates of hospital utilization by children with gastrointestinal disorders: analysis of the … Perioperative complications and mortality after spinal fusions: analysis of trends and risk factors. … National estimates of hospital use by children with HIV infection in the United States: analysis of data

284. NIS Related Reports
     hcup-us.ahrq.gov/db/nation/nis/nisrelatedreports.jsp
     February 01, 2025 - Login Do Your own analysis Explore Expert Research & Limited … To do trends analysis using earlier data years, use NIS Trend Weights   The following

285. HEALTHCARE COST AND UTILIZATION PROJECT — HCUP (pdf file)
     hcup-us.ahrq.gov/db/nation/nis/reports/NIS_2003_Design_Report_Edited_012506.pdf
     January 01, 2003 - .......................................................................................... iv Data Analysis … Data Analysis Missing Values Missing data values can compromise the quality of estimates. … In order to facilitate analysis of trends using multiple years of NIS data, an alternate set of NIS … DATA ANALYSIS Missing Values Missing data values can compromise the quality of estimates. … In order to facilitate analysis of trends using multiple years of NIS data, an alternate set of NIS

286. HEALTHCARE COST AND UTILIZATION PROJECT — HCUP (pdf file)
     hcup-us.ahrq.gov/db/nation/nis/reports/NIS_2004_Design_Report.pdf
     January 01, 2004 - .......................................................................................... iv Data Analysis … Data Analysis Missing Values Missing data values can compromise the quality of estimates. … In order to facilitate analysis of trends using multiple years of NIS data, an alternate set of NIS … DATA ANALYSIS Missing Values Missing data values can compromise the quality of estimates. … In order to facilitate analysis of trends using multiple years of NIS data, an alternate set of NIS

287. Opioid-Related Inpatient Stays and Emergency Department Visits by State, 2009-2014 (pdf file)
     hcup-us.ahrq.gov/reports/statbriefs/sb219-Opioid-Hospital-Stays-ED-Visits-by-State.pdf
     October 31, 2016 - Types of hospitals included in HCUP State Inpatient Databases This analysis used State Inpatient Databases … Excluded for this analysis are long-term care facilities such as rehabilitation, psychiatric, and alcoholism … Types of hospitals included in HCUP State Emergency Department Databases This analysis used State Emergency … Unit of analysis The unit of analysis for inpatient data is the hospital discharge (i.e., the hospital … The unit of analysis for ED data is the ED visit, not a person or patient.

288. Opioid-Related Inpatient Stays and Emergency Department Visits by State, 2009-2014 #219
     hcup-us.ahrq.gov/reports/statbriefs/sb219-Opioid-Hospital-Stays-ED-Visits-by-State.jsp
     October 31, 2016 - Login Do Your own analysis Explore Expert Research & Limited … Types of hospitals included in HCUP State Inpatient Databases This analysis used State Inpatient Databases … Excluded for this analysis are long-term care facilities such as rehabilitation, psychiatric, and alcoholism … Unit of analysis The unit of analysis for inpatient data is the hospital discharge (i.e., the hospital … The unit of analysis for ED data is the ED visit, not a person or patient.

289. Utilization of Intensive Care Services, 2011 #185
     hcup-us.ahrq.gov/reports/statbriefs/sb185-Hospital-Intensive-Care-Units-2011.jsp
     December 01, 2014 - Login Do Your own analysis Explore Expert Research & Limited … The analysis considered 16.9 million inpatient stays from 1,882 hospitals. … This analysis was limited to those stays with ICU services. … This analysis was further limited to general medical/surgical hospitals. … Unit of analysis The unit of analysis is the hospital discharge (i.e., the hospital stay), not a person

290. HCUP Frequently Asked Questions
     hcup-us.ahrq.gov/tech_assist/faq.jsp
     September 01, 2025 - What is HCUP's unit of analysis? … Can I perform multi-year or trend analysis using the NIS? … Can I use the NASS for longitudinal analysis? The NASS can be used for longitudinal analysis. … Can I conduct a multi-year analysis with the NRD? … How should the CCIR for ICD-10-CM be used for an analysis that counts chronic conditions?

291. Enhancing the Clinical Content of Administrative Data - Present on Admission (POA) Toolkit
     hcup-us.ahrq.gov/datainnovations/clinicaldata/poatoolkit.jsp
     July 01, 2021 - Login Do Your own analysis Explore Expert Research & Limited … aims to provide a comprehensive set of materials needed for all-payer POA indicator collection and analysis

292. THE HCUP NATIONWIDE AMBULATORY SURGERY SAMPLE (NASS) 2020
     hcup-us.ahrq.gov/db/nation/nass/NASS_Introduction_2020.jsp
     January 01, 2020 - Login Do Your own analysis Explore Expert Research & Limited … Will not identify or attempt to identify any individual, including by the use of vulnerability analysis … It is essential to check all procedure codes used for analysis to ensure that the codes are in effect … It is critical to check all ICD-10-CM codes used for analysis to ensure that the codes are in effect … In contrast, some HCUP State databases may be used for this type of analysis.

293. Changes in Pediatric Hospitalizations and In-Hospital Deaths in the Initial Period of the COVID-19 Pandemic (April–September 2020), 13 States (pdf file)
     hcup-us.ahrq.gov/reports/statbriefs/sb283-COVID-19-PediatricHosptl.pdf
     August 23, 2021 - This analysis is limited to discharges for pediatric patients treated in community, nonrehabilitation … This analysis is limited to patients treated in community, nonrehabilitation hospitals in 13 States … Types of hospitals included in HCUP State Inpatient Databases (and quarterly inpatient data) This analysis … Excluded for this analysis are long-term care facilities such as rehabilitation, psychiatric, and alcoholism … Unit of analysis The unit of analysis is the hospital discharge (i.e., the hospital stay), not a person

294. Results Final Report
     hcup-us.ahrq.gov/datainnovations/clinicaldata/3MSummaryResultsReportFinal.jsp
     October 03, 2010 - Login Do Your own analysis Explore Expert Research & Limited … The rows in the analysis are the different ranges of the laboratory test result being examined. … Each model was run against the Florida analysis dataset. … RESULTS APR DRG Classification of the Florida Administrative Discharge Analysis Dataset The 188, … 555 administrative records in the analysis file were grouped and assigned an Admission and Discharge

295. THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2009
     hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2009.jsp
     January 01, 2009 - Login Do Your own analysis Explore Expert Research & Limited … One of the most distinctive features of the NEDS is its large sample size, which allows for analysis … Structure the information for efficient storage, manipulation, and analysis. … Return to Introduction   HOW TO USE THE NEDS FOR DATA ANALYSIS This section provides a brief … In contrast, the HCUP state databases may be used for this type of analysis.

296. Characteristics and Costs of Potentially Preventable Inpatient Stays, 2017 (pdf file)
     hcup-us.ahrq.gov/reports/statbriefs/sb259-Potentially-Preventable-Hospitalizations-2017.pdf
     January 01, 2017 - Data Source The estimates in this Statistical Brief are based upon an analysis done for the National … SID meeting the following inclusion criteria were included in the nationally weighted analysis file: … In data year 2017, the nationally weighted analysis file includes data from 36 SID and 30,744,878 discharges … Unit of analysis The unit of analysis is the hospital discharge (i.e., the hospital stay), not a person … Introduction Definitions Unit of analysis Costs and charges Expected payer Region Reporting of

297. HCUP Facts and Figures 2009: Statistics on Hospital-Based Care in the United States
     hcup-us.ahrq.gov/reports/factsandfigures/2009/sources_methods.jsp
     January 01, 2009 - Login Do Your own analysis Explore Expert Research & Limited … INFO ACKNOWLEDGMENTS CITATION FACTS & FIGURES 2009 PDF SOURCES AND METHODS Unit of Analysis … The unit of analysis is the hospital stay rather than the patient. … CCS codes are used extensively in this report to define groups of diagnoses and procedures for analysis

298. THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2007
     hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2007v2.jsp
     November 01, 2015 - Login Do Your own analysis Explore Expert Research & Limited … One of the most distinctive features of the NEDS is its large sample size, which allows for analysis … Structure the information for efficient storage, manipulation, and analysis. … Return to Introduction   HOW TO USE THE NEDS FOR DATA ANALYSIS This section provides a brief … In contrast, the HCUP state databases may be used for this type of analysis.

299. THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2006
     hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2006v2.jsp
     November 01, 2015 - Login Do Your own analysis Explore Expert Research & Limited … One of the most distinctive features of the NEDS is its large sample size, which allows for analysis … Structure the information for efficient storage, manipulation, and analysis. … Return to Introduction   HOW TO USE THE NEDS FOR DATA ANALYSIS This section provides a brief … In contrast, the HCUP state databases may be used for this type of analysis.

300. Racial and Ethnic Differences in Emergency Department Visits Related to Substance Use Disorders, 2019 (pdf file)
     hcup-us.ahrq.gov/reports/statbriefs/sb301-ED-Substance-Use-Disorders-Race-2019.pdf
     January 01, 2019 - Because the analysis included patient county of residence designations, the population was limited to … Because the analysis included patient county of residence designations, the population was limited to … Because the analysis included patient county of residence designations, the population was limited to … Because the analysis included patient county of residence designations, the population was limited to … Unit of analysis The unit of analysis is the ED visit, not a person or patient.