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Showing results for "statistical".

1. Meta-Analytic Statistical Inferences for Continuous Measure Outcomes as a Function of Effect Size Metric and Other Assumptions | Effective Health Care Program
   effectivehealthcare.ahrq.gov/products/statistical-inference
   April 10, 2013 - Meta-Analytic Statistical Inferences for Continuous Measure Outcomes as a Function of Effect Size Metric … Topic Initiated April 10, 2013 Research Report Meta-Analytic Statistical

2. Meta-Analytic Statistical Inferences for Continuous Measure Outcomes as a Function of Effect Size Metric and Other Assumptions | Effective Health Care (EHC) Program
   effectivehealthcare.ahrq.gov/products/statistical-inference/research
   April 10, 2013 - Meta-Analytic Statistical Inferences for Continuous Measure Outcomes as a Function of Effect Size Metric … Also unresolved is which of many possible available equations best optimize statistical modeling for … Results This investigation provides guidance for statistical practice in relation to meta-analysis … In contrast, when conditions deviate from these ideals, the SMD yields better statistical inferences … the choice of effect size metrics, estimators, and sampling variances can have substantial impact on statistical

3. Methods Research Report - Meta-Analytical Statistical Inferences for Continuous Measure Outcomes as a Function of Effect Size Metric and Other Assumptions (pdf file)
   effectivehealthcare.ahrq.gov/sites/default/files/pdf/statistical-inference_research.pdf
   April 01, 2013 - Methods Research Report - Meta-Analytical Statistical Inferences for Continuous Measure Outcomes as a … Size Metric and Other Assumptions Methods Research Report Meta-Analytic Statistical … Also unresolved is which of many possible available equations best optimize statistical modeling for … Statistical methods for meta-analysis. Orlando: Academic Press; 1985. 9. … Statistical power analysis for the behavioral sciences. 2nd ed.

4. Quantitative Synthesis: Chapter 4. Quantifying, Testing, and Exploring Statistical Heterogeneity (pdf file)
   effectivehealthcare.ahrq.gov/sites/default/files/pdf/ehc-presentation-quantitative-synthesis-chapter-4.pdf
   July 01, 2019 - Quantifying, Testing, and Exploring Statistical Heterogeneity Quantitative Synthesis Chapter 4. … Quantifying, Testing, and Exploring Statistical Heterogeneity Prepared for: The Agency for Healthcare … Learning objective Statistical heterogeneity • Statistical heterogeneity occurs when estimates across … heterogeneity tests statistical for statistical heterogeneity in meta-analysis is Q:11 ► Q is computed … Quantifying, Testing, and Exploring �Statistical Heterogeneity Learning objective Statistical heterogeneity

5. Development and Implementation of Secure Statistical Analyses on Distributed Databases | Effective Health Care (EHC) Program
   effectivehealthcare.ahrq.gov/products/dsitributed-database-analyses/abstract
   July 28, 2010 - Development and Implementation of Secure Statistical Analyses on Distributed Databases Abstract Archived … As a result, this current project is to develop, test, and validate a method for secure statistical analysis … The successful implementation of the secure statistical analysis within a distributed database model … Methods: This work is intended to enable remote execution of multivariate statistical analysis within … scientific reports will be prepared, including a comprehensive implementation manual targeting master level statistical

6. Quantitative Synthesis Chapter 3. Choice of Statistical Model for Combining Studies (pdf file)
   effectivehealthcare.ahrq.gov/sites/default/files/pdf/ehc-presentation-quantitative-synthesis-chapter-3.pdf
   February 01, 2018 - Choice of Statistical Model for Combining Studies Quantitative Synthesis Chapter 3. … The statistical basis of meta-analysis. Stat Methods Med Res. 1993;2(2):121-45. … Choice of Statistical Model for Combining Studies Slide Number 2 Statistical models for meta-analysis … Statistical models for meta-analysis� Recommendations for �Chapter 3. … Statistical models for meta-analysis� Author References

7. Slide 1
   effectivehealthcare.ahrq.gov/sites/default/files/study-size-planning-chapter-9.pptx
   January 01, 2013 - power) for any subgroup analyses Specify the expected precision (or statistical power) as sensitivity … power) for any unplanned subgroup analyses; and specify the expected precision (or statistical power … a prespecified hypothesis and adequate statistical power. … Needed study size depends on the chosen type 1 error rate (α) and required statistical power. … Specify the expected precision (or statistical power) for any planned subgroup analyses.

8. Quantitative Synthesis: Chapter 1. Decision To Combine Trials (pdf file)
   effectivehealthcare.ahrq.gov/sites/default/files/pdf/ehc-presentation-quantitative-synthesis-chapter-1.pdf
   July 01, 2019 - Performance of statistical methods for meta-analysis when true study effects are non-normally distributed … are not concerns. ► Chapter 4 covers statistical heterogeneity in detail • Statistical heterogeneity … http://www.training.cochrane.org/handbook Assessing statistical heterogeneity • I2: proportion of … Performance of statistical methods for meta-analysis when true study effects are non-normally distributed … heterogeneity Assessing statistical heterogeneity Pooling decision tree (1) Pooling decision tree

9. Covariate Selection for Observational Comparative Effectiveness Research
   effectivehealthcare.ahrq.gov/sites/default/files/considerations-for-statistical-chapter-10.pptx
   January 01, 2013 - Considerations for statistical analysis. In: Velentgas P and Dreyer NA, eds. … Considerations for statistical analysis. In: Velentgas P and Dreyer NA, eds. … Considerations for statistical analysis. In: Velentgas P and Dreyer NA, eds. … Considerations for statistical analysis. In: Velentgas P and Dreyer NA, eds. … Considerations for statistical analysis. In: Velentgas P and Dreyer NA, eds.

10. Harmonization of Cognitive Measures in Individual Participant Data and Aggregate Data Meta-Analysis | Effective Health Care (EHC) Program
    effectivehealthcare.ahrq.gov/products/cognitive-measures-harmonization/research
    March 21, 2013 - They can be approached with The aim of this study was to identify approaches to statistical harmonization … The second component was to identify general literature on statistical methods for data harmonization … Results Three general classes of statistical harmonization models were identified: (1) standardization … In general consistency was found among the statistical harmonization methods; however, there was some … Of the three methods of statistical harmonization for cognition data, T-score standardization is the

11. Development and Implementation of Secure Statistical Analyses on Distributed Databases | Effective Health Care Program
    effectivehealthcare.ahrq.gov/products/dsitributed-database-analyses
    July 28, 2010 - Development and Implementation of Secure Statistical Analyses on Distributed Databases … July 28, 2010 Abstract Archived Development and Implementation of Secure Statistical

12. Development of Statistical Estimators to Address Questions of Comparative Effectiveness in Elderly Heart Failure Patients | Effective Health Care Program
    effectivehealthcare.ahrq.gov/products/heart-failure-seniors-estimators
    December 02, 2009 - Development of Statistical Estimators to Address Questions of Comparative Effectiveness in Elderly Heart … Initiated December 02, 2009 Research Report Development of Statistical

13. Ch 9-User-Guide-To-Ocer 130129 (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/ch_9-user-guide-to-ocer_130129.pdf
    September 21, 2012 - This is problematic when investigators interpret study findings in terms of the statistical significance … models.4 Calculating statistical power requires specification of several investigator choices and … Finally, needed study size depends on the chosen Type I error rate (a) and the required statistical … o Specify the expected precision (or statistical power) for any planned subgroup analyses. … Stata Statistical Software: Release 11. College Station, TX: StataCorp; 2009. 3. Hintze, J.

14. Comprehensive Overview of Methods and Reporting of Meta-Analyses of Test Accuracy | Effective Health Care (EHC) Program
    effectivehealthcare.ahrq.gov/products/diagnostic-tests-reviews/research
    March 27, 2012 - methods used in the meta-analysis of diagnostic tests, validate newly proposed methods, develop new statistical … test types covered, methods for literature synthesis and quality assessment, availability of data, and statistical … In statistical analyses, sensitivity (in 77 percent), specificity (in 74 percent) and diagnostic/predictive … Over time there have been substantial improvements in the literature review, quality assessment and statistical … Advanced statistical methods have been increasingly adopted over time but their use still remains limited

15. Developing Methods to Assess Health Outcomes in the Presence of Competing Risks for Effectiveness Research | Effective Health Care Program
    effectivehealthcare.ahrq.gov/products/health-outcomes-competing-risks/abstract
    February 11, 2010 - Evaluating health outcomes in the presence of competing risks: a review of statistical methods and clinical … Although statistical methods exist for quantifying the probability of benefit from an intervention while … considering competing risks in the evaluation of treatment effectiveness, and to review appropriate statistical … Research Design and Methods We reviewed 3 statistical approaches for analyzing the competing risks … Results Simulation studies evaluating the statistical power to detect the effect of intervention under

16. Slide 1
    effectivehealthcare.ahrq.gov/sites/default/files/estimation-and-reporting_chapter-3.pptx
    January 01, 2013 - significance Describe how confounding will be addressed Describe statistical approaches that will be … Restriction of RCTs to homogeneous groups improves statistical power. … It should also be noted that a statistical test of interaction does not correspond to an assessment of … It is important to ensure adequate statistical power for confirmatory subgroup analyses. … It is important to ensure adequate statistical power to detect subgroup effects and to appropriately

17. Slide 1
    effectivehealthcare.ahrq.gov/sites/default/files/sensitivity-analysis-chapter-11.pptx
    January 01, 2013 - Observational studies and statistical models rely on assumptions ranging from how a variable is defined … to how a statistical model is chosen and parameterized. … Consider the use of more than one cohort definition or statistical approach. … Cohort Definition and Statistical Approaches Cohort Definition and Statistical Approaches It can … Statistical software-based Statistical software-based approaches can be helpful where the association

18. Conducting Quantitative Synthesis when Comparing Medical Interventions: AHRQ and the Effective Health Care Program (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/methodsguide_conductingquantitativesynthesis.pdf
    October 01, 2010 - Statistical heterogeneity: variability in observed treatment effects across studies. … These decisions require clinical insights as well as statistical expertise. … A p-value of 0.10 instead of 0.05 could be used to determine statistical significance. … Statistical power analysis for the behavioral sciences. Hillsdale, NJ: L. … A comparison of statistical methods for meta-analysis. Stat Med 2001;20:825–840. 37.

19. Conducting Quantitative Synthesis when Comparing Medical Interventions: AHRQ and the Effective Health Care Program (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/methods-guidance-quantitative-synthesis_methods.pdf
    October 01, 2010 - Statistical heterogeneity: variability in observed treatment effects across studies. … These decisions require clinical insights as well as statistical expertise. … A p-value of 0.10 instead of 0.05 could be used to determine statistical significance. … Statistical power analysis for the behavioral sciences. Hillsdale, NJ: L. … A comparison of statistical methods for meta-analysis. Stat Med 2001;20:825–840. 37.

20. The Empirical Evidence of Bias in Trials Measuring Treatment Differences | Effective Health Care (EHC) Program
    effectivehealthcare.ahrq.gov/products/treatment-effects-bias/research
    September 29, 2014 - provider blinding; detection bias through outcome assessor and data analyst blinding and appropriate statistical … studies on patient and/or provider blinding, 8 studies on assessor blinding, 2 studies on appropriate statistical … In contrast, evidence was generally inconsistent and imprecise in relation to confounding, adequate statistical … to measure biases, the thoroughness of reporting of trial conduct that was required, approaches to statistical