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Showing results for "design sample size".

161. Table 2: NIS and NHDS Comparisons by Region, 1999 (pdf file)
     hcup-us.ahrq.gov/reports/methods/1999NISComparisonReportFinal.pdf
     March 08, 2002 - Due to the limited sample size, valid estimates were not available for all breakdowns of the NHDS data … size of the NHDS yielding insufficient sample sizes to produce valid estimates. … In areas where there are no biases due to sampling, the NIS provides a large enough sample size to yield … Because NIS estimates have greater precision due to a large sample size, it might be the preferred database … Where a comprehensive geographic representation is more important than a large sample size, and the

162. THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2007
     hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2007v2.jsp
     November 01, 2015 - One of the most distinctive features of the NEDS is its large sample size, which allows for analysis … Return to Introduction   SAMPLING DESIGN OF THE NEDS Similar to the design of the Nationwide … A sample size of 20 percent was based on previous experience with similar research databases. … sizes 8: Metropolitan (large and small) 9: Non-metropolitan (micropolitan and non-urban … sizes: (8) Trauma center level I or II, (9) Trauma center level I, II, or III.

163. THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2006
     hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2006v2.jsp
     November 01, 2015 - One of the most distinctive features of the NEDS is its large sample size, which allows for analysis … Return to Introduction   SAMPLING DESIGN OF THE NEDS Similar to the design of the NIS, the NEDS … A sample size of 20 percent was based on previous experience with similar research databases. … sizes 8: Metropolitan (large and small) 9: Non-metropolitan (micropolitan and non-urban … sizes: (8) Trauma center level I or II, (9) Trauma center level I, II, or III.

164. THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2020
     hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2020.jsp
     January 01, 2020 - One of the most distinctive features of the NEDS is its large sample size, which allows for analysis … The HCUP Sample Design tutorial is designed to help users learn how to account for sample design in their … The HCUP Sample Design tutorial is designed to help users learn how to account for sample design in their … A sample size of 20 percent was based on previous experience with similar research databases. … size and/or a coefficient of variation >30 percent.

165. Family Experiences with Coordination of Care (FECC) Measure Set (pdf file)
     www.ahrq.gov/sites/default/files/wysiwyg/pqmp/measures/chronic/chipra-166-fullreport.pdf
     March 01, 2018 - Sample Size: What is the typical sample size available for each unit at this level? … Sample Size: What is the typical sample size available for each unit at this level? … Sample Size: What is the typical sample size available for each unit at this level? … Sample Size: What is the typical sample size available for each unit at this level? … Sample Size: What is the typical sample size available for each unit at this level?

166. THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2009
     hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2009.jsp
     January 01, 2009 - One of the most distinctive features of the NEDS is its large sample size, which allows for analysis … The HCUP Sampling Design tutorial is designed to help users learn how to account for sample design … A sample size of 20 percent was based on previous experience with similar research databases. … Collapsed categories used for strata with small sample sizes: (8) Trauma center level I or II, (9) Trauma … Collapsed categories used for strata with small sample sizes: (8) Metropolitan (large and small), (9)

167. Final Progress Report: Improving Implementation and QI Research with Regression Risk Analysis (pdf file)
     www.ahrq.gov/sites/default/files/2025-02/kleinman2-report.pdf
     January 01, 2025 - Methods (Study Design, Data Sources/Collection, Interventions, Measures, Limitations) Study Design … In the case of complex survey design, two ARR estimates were calculated: one that accounted for the … We also have used the margins command to create code that adjusts for complex survey design for all … The resulting sample size of variables with non-missing values on the variables of interest is 86,913 … Computing risk ratios from Data with Complex Survey Design.

168. Layout 1 (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/cancer-radiation_executive.pdf
     November 01, 2009 - Four reviewers identified studies of any design describing clinical outcomes or adverse events with 10 … Primary outcomes were explicitly stated in only three trials, which also reported a priori sample size … All trials enrolled a relatively small sample size, ranging from 15 to 393 patients, and studied different … The available slots for particle beam radiotherapy are very limited, and this may have impacted the design … Most eligible studies were noncomparative in nature and had small sample sizes.

169. MEPS Sample Persons In-Scope for Part of the Year: Identification and Analytic Considerations
     meps.ahrq.gov/about_meps/hc_sample.shtml
     April 01, 2005 - Table 1: Sample Sizes and Reasons for Part-Year Data, 2002 MEPS Characteristics Sample Size …  wgt=1; *; proc descript data=work.a filetype=sas design … size" total setotal/  style=NCHS totalfmt=f12.0 setotalfmt=f12.0;   … category catfmt.; *; proc descript data=work.a filetype=sas design … size" wsum="Weighted size" mean semean/  style=NCHS wsumfmt=f12.0 meanfmt=f10.3

170. THE HCUP NATIONWIDE AMBULATORY SURGERY SAMPLE (NASS) 2018
     hcup-us.ahrq.gov/db/nation/nass/NASS_Introduction_2018.jsp
     January 01, 2018 - The HCUP Sample Design tutorial is designed to help users learn how to account for sample design in … The tutorial will be updated in the future to directly address the NASS sampling design. … estimates ( encounter universe ), tabulated in strata used in the sampling design. … Examine the strata with deficient ratios or sample sizes. … The NASS sampling design consists of a stratified, single-stage cluster sample.

171. HEALTHCARE COST AND UTILIZATION PROJECT — HCUP (pdf file)
     hcup-us.ahrq.gov/db/nation/nass/NASS_Introduction_2016.pdf
     January 01, 2016 - • The HCUP Sample Design tutorial is designed to help users learn how to account for sample design … estimates (encounter universe), tabulated in strata used in the sampling design. … • Examine the strata with deficient ratios or sample sizes. … Census region was considered as an essential stratum to include in the design. … The NASS sampling design consists of a stratified, single- stage cluster sample.

172. HEALTHCARE COST AND UTILIZATION PROJECT — HCUP (pdf file)
     hcup-us.ahrq.gov/db/nation/nass/2017_NASS_Introduction.pdf
     January 01, 2017 - • The HCUP Sample Design tutorial is designed to help users learn how to account for sample design … estimates (encounter universe), tabulated in strata used in the sampling design. … • Examine the strata with deficient ratios or sample sizes. … Census region was considered as an essential stratum to include in the design. … The NASS sampling design consists of a stratified, single- stage cluster sample.

173. THE HCUP NATIONWIDE EMERGENCY DEPARTMENT SAMPLE (NEDS), 2008
     hcup-us.ahrq.gov/db/nation/neds/NEDS_Introduction_2008.jsp
     January 01, 2008 - One of the most distinctive features of the NEDS is its large sample size, which allows for analysis … Return to Introduction   SAMPLING DESIGN OF THE NEDS Similar to the design of the Nationwide … A sample size of 20 percent was based on previous experience with similar research databases. … sizes 8: Metropolitan (large and small) 9: Non-metropolitan (micropolitan and non-urban … sizes: (8) Trauma center level I or II, (9) Trauma center level I, II, or III.

174. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2011
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2011.jsp
     January 01, 2011 - The NIS' large sample size enables analyses of rare conditions, such as specific types of cancer; uncommon … The HCUP Sampling Design tutorial is designed to help users learn how to account for sample design … Return to Introduction Hospital Sample Design Design Considerations The NIS is a stratified … This sample size was determined by AHRQ based on their experience with similar research databases. … While this approach was admittedly less efficient, the extremely large sample sizes yield reliable estimates

175. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2010
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2010.jsp
     January 01, 2010 - The NIS' large sample size enables analyses of rare conditions, such as specific types of cancer; uncommon … The HCUP Sampling Design tutorial is designed to help users learn how to account for sample design … Return to Introduction Hospital Sample Design Design Considerations The NIS is a stratified … This sample size was determined by AHRQ based on their experience with similar research databases. … While this approach was admittedly less efficient, the extremely large sample sizes yield reliable estimates

176. INTRODUCTION TO THE HCUP NATIONWIDE INPATIENT SAMPLE (NIS), 2009
     hcup-us.ahrq.gov/db/nation/nis/NIS_Introduction_2009.jsp
     January 01, 2009 - The NIS' large sample size enables analyses of rare conditions, such as specific types of cancer; uncommon … The HCUP Sampling Design tutorial is designed to help users learn how to account for sample design … Return to Introduction Hospital Sample Design Design Considerations The NIS is a stratified … This sample size was determined by AHRQ based on their experience with similar research databases. … While this approach was admittedly less efficient, the extremely large sample sizes yield reliable estimates

177. Transparency of Reporting Requirements: Tympanostomy Tubes (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/transparency-tympanostomy_research-protocol.pdf
     September 02, 2016 - This spreadsheet will capture basic intervention, outcome, study design, sample size, and whether results … , intervention type and duration, population, outcomes, and sample size. … We will make such comparisons only with respect to 1) general design items used to inform risk … We quantify such impact as a potential increase in total study population sample size (>20%), a change … With input from the TEP, study-design and sample-size filters will be implemented, as needed, to contain

178. Adolescent Assessment of Preparation for Transition (ADAPT) to Adult-Focused Health Care (pdf file)
     www.ahrq.gov/sites/default/files/wysiwyg/pqmp/measures/outcomes/chipra-146-fullreport.pdf
     January 01, 2020 - Sample Size: What is the typical sample size available for each unit at this level? … Sample Size: What is the typical sample size available for each unit at this level? … Sample Size: What is the typical sample size available for each unit at this level? … Sample Size: What is the typical sample size available for each unit at this level? … Sample Size: What is the typical sample size available for each unit at this level?

179. Diabetes Mellitus | Digital Healthcare Research
     digital.ahrq.gov/medical-condition/diabetes-mellitus
     January 01, 2025 - Patient-Reported Data into Diabetes Management A flexible micro-randomized trial design … and sample size considerations. … A flexible micro-randomized trial design and sample size considerations.

180. Appendix H. Calculating Sensitivity and Specificity for Validation | Agency for Healthcare Research and Quality
     www.ahrq.gov/research/findings/final-reports/ssi/ssiaph.html
     April 01, 2018 - be positive is a hypergeometric random variable (A, AP, a) = (population size, subpopulation size, sample … size) From the True positive charts, A, a are sampled   Sampled? … sensitivity) Var(Specificity) = Var(HR specificity) + Var(HR specificity) x (Alg specificity) 2 Table for sample … size a = c = 50 (so 50 true + and 50 true -) Algorithm Sensitivity Algorithm Specificity … The variance in the estimates were small due to the large sample size (C+D) and high sensitivity of the