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421. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2007
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2007.jsp
     January 01, 2007 - However, these NIS samples were not designed to yield a representative sample of hospitals at the State … The two samples could be combined to form a single, generalizable 20% subsample of discharges. … an equal probability of selection for the sample, regardless of whether they appeared in prior NIS samples … This deviates from the procedure used for earlier samples, which maximized the longitudinal component … For a description of zero-weight hospitals in the 1988-1992 samples, refer to the special report: Design

422. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2008
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2008.jsp
     January 01, 2008 - However, these NIS samples were not designed to yield a representative sample of hospitals at the State … The two samples could be combined to form a single, generalizable 20% subsample of discharges. … an equal probability of selection for the sample, regardless of whether they appeared in prior NIS samples … This deviates from the procedure used for earlier samples, which maximized the longitudinal component … For a description of zero-weight hospitals in the 1988-1992 samples, refer to the special report: Design

423. TRial of Aggregate Data Exchange for Maintenance of certification and Raising Quality (TRADEMaRQ) - Final Report (pdf file)
     digital.ahrq.gov/sites/default/files/docs/citation/r21hs022583-phillips-final-report-2018.pdf
     January 01, 2018 - Maintenance of Certification (MOC), measuring and reporting quality measures from limited patient samples … to reduce burden for reporting quality measures, to use whole-panel data rather than hand-entered samples

424. INTRODUCTION TO THE HCUP NATIONAL INPATIENT SAMPLE (NIS), 2021
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2021.jsp
     January 01, 2021 - Analyses of time trends using the HCUP NIS are recommended from 1993 forward because earlier samples … Analyses of time trends using the HCUP NIS are recommended from 1993 forward because earlier samples

425. INTRODUCTION TO THE HCUP NATIONAL INPATIENT SAMPLE (NIS), 2020
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2020.jsp
     January 01, 2020 - Analyses of time trends using the HCUP NIS are recommended from 1993 forward because earlier samples … Analyses of time trends using the HCUP NIS are recommended from 1993 forward because earlier samples

426. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2010
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2010.jsp
     January 01, 2010 - However, these NIS samples were not designed to yield a representative sample of hospitals at the State … The two samples could be combined to form a single, generalizable 20% subsample of discharges. … an equal probability of selection for the sample, regardless of whether they appeared in prior NIS samples … This deviates from the procedure used for earlier samples, which maximized the longitudinal component … For a description of zero-weight hospitals in the 1988-1992 samples, refer to the special report: Design

427. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2011
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2011.jsp
     January 01, 2011 - However, these NIS samples were not designed to yield a representative sample of hospitals at the State … The two samples could be combined to form a single, generalizable 20% subsample of discharges. … an equal probability of selection for the sample, regardless of whether they appeared in prior NIS samples … This deviates from the procedure used for earlier samples, which maximized the longitudinal component … For a description of zero-weight hospitals in the 1988-1992 samples, refer to the special report: Design

428. The Impact of Health Information Technology on Demand for Inpatient Services - Final Report (pdf file)
     digital.ahrq.gov/sites/default/files/docs/publication/r36hs018272-barrette-final-report-2011.pdf
     January 01, 2011 - Other sub-samples of the data are necessary to fully understand the impact of health IT on hospital … implies case studies, 11 small samples … In both DRG samples the health IT combination variable (EMR & CPOE) and interactions are jointly significantly … Also, in both samples the health IT * distance interaction term was negative; it was only significant … In the joint replacement and heart failure samples the average annual marginal effect of adopting CPOE

429. Fielding the CAHPS Child Hospital Survey (pdf file)
     www.ahrq.gov/sites/default/files/wysiwyg/pqmp/toolkits/fielding-child-hcahps.pdf
     June 02, 2025 - Sampling In disproportionate stratified random sampling, dissimilar sampling ratios are used to draw samples

430. Fielding the CAHPS Child Hospital Survey (pdf file)
     www.ahrq.gov/sites/default/files/wysiwyg/cahps/surveys-guidance/hospital/about/fielding-child-hcahps-93.pdf
     June 02, 2025 - Sampling In disproportionate stratified random sampling, dissimilar sampling ratios are used to draw samples

431. INTRODUCTION TO THE HCUP NATIONAL INPATIENT SAMPLE (NIS), 2013
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2013.jsp
     January 01, 2013 - Analyses of time trends using the HCUP NIS are recommended from 1993 forward because earlier samples … Analyses of time trends using the HCUP NIS are recommended from 1993 forward because earlier samples … of discharges from a sample of approximately 1,000 hospitals, whereas the proposed systematic design samples … Patient factors DRG Admission month The superior performance of the systematic design that samples … 0.58 0.57 0.55 Hospital Mortality 0.57 0.55 0.55 0.51 Based on 500 Simulated Samples

432. Sample Designs of the Medical Expenditure Panel Survey Household Component, 1996–2006 and 2007–2016 (pdf file)
     meps.ahrq.gov/data_files/publications/mr33/mr33.pdf
     January 01, 2019 - annual estimates produced from MEPS, data are combined across two distinct nationally representative samples … Reserve samples for 2 additional years were also selected. … Also, since the sample size in MEPS full-year files include samples from two overlapping panels, the … Beginning with the 2002 MEPS, samples were drawn from three or more domains.

433. Methodology Report #33: Sample Designs of the Medical Expenditure Panel Survey Household Component, 1996-2006 and 2007-2016
     meps.ahrq.gov/data_files/publications/mr33/mr33.shtml
     January 01, 2019 - annual estimates produced from MEPS, data are combined across two distinct nationally representative samples … Reserve samples for 2 additional years were also selected. … Also, since the sample size in MEPS full-year files include samples from two overlapping panels, the … Beginning with the 2002 MEPS, samples were drawn from three or more domains.

434. Methodology Report #3: Design and Methods of the 1996 Medical Expenditure Panel Survey Nursing Home Component (pdf file)
     meps.ahrq.gov/data_files/publications/mr3/mr3.pdf
     September 01, 1998 - To allow a chance of selection for all persons in this universe, two samples of residents were selected … who were admitted to the sampled nursing home between January 1 and June 30, 1996 (the first of two samples … absence of contact X X X Active diagnoses and conditions on MDS assessment X X X Collected for both samples … nutritional status Chewing problem X X X Swallowing problem X X X Mouth pain X X X Collected for both samples … Collected for both samples, measured for: Collected for the January 1st sample, measured at: Collected

435. Calculating Variances Using the 1999 Nationwide Inpatient Sample (pdf file)
     hcup-us.ahrq.gov/db/nation/kid/reports/CalculatingKIDVariances.pdf
     December 16, 2005 - • The SURVEYSELECT procedure provides a variety of methods for selecting probability-based random samples … The procedure can select a simple random sample, or samples with design features such as stratification

436. Calculating Variances Using the 1999 Nationwide Inpatient Sample (pdf file)
     hcup-us.ahrq.gov/reports/methods/2005-07.pdf
     January 01, 2005 - • The SURVEYSELECT procedure provides a variety of methods for selecting probability-based random samples … The procedure can select a simple random sample, or samples with design features such as stratification

437. Calculating Variances Using the 1999 Nationwide Inpatient Sample (pdf file)
     hcup-us.ahrq.gov/reports/methods/2003_02.pdf
     January 01, 2003 -  The SURVEYSELECT procedure provides a variety of methods for selecting probability-based random samples … The procedure can select a simple random sample, or samples with design features such as stratification

438. HCUP Nationwide Inpatient Sample Design Report 1992-1988
     hcup-us.ahrq.gov/db/nation/nis/reports/NIS_1992_1988_Design_Report.jsp
     January 01, 1992 - The two samples can be combined to form a single, generalizable 20 percent subsample of discharges. … Potthoff, Woodbury, and Manton 2 ) have been developed to draw inferences using weights from complex samples

439. HCUP Sample Design: National Databases - Accessible Version
     hcup-us.ahrq.gov/tech_assist/sampledesign/508_compliance/index508_2018.jsp
     January 01, 2018 - Remember that these national databases are based on samples - they must be weighted to derive national

440. 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 - superpopulation (stochastic) model, procedures have been developed to draw inferences using weights from complex samples … The SURVEYSELECT procedure provides a variety of methods for selecting probability-based random samples … The procedure can select a simple random sample, or samples with design features such as stratification