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Showing results for "statistical".

61. S166 (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/s166.pdf
    October 01, 2007 - Bayesian Estimates The use of Bayesian statistical methods in meta-analy- sis has been well documented … clinically because they are represented in units of standard deviation and thus must be judged from a statistical … Statistical Interpretation of the Findings We found no significant differences in any of the com- parisons … Changes in statistical conclusions also occurred. … Statistical methods for examining heterogeneity and combining results from several studies in meta- analysis

62. Continuous-Outcomes-Quantitative-Synthesis Methods (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/continuous-outcomes-quantitative-synthesis_methods.pdf
    March 01, 2011 - Current practices of using statistical testing for baseline difference vary. … in terms of bias, coverage probability, and statistical power. … Statistical Analysis with Missing Data. 2nd ed. Hoboken, NJ: Wiley; 1987. 27. … Statistical methods for analysis of effects of treatment in overviews of randomized trials. … Statistical Power Analysis for the Behavioral Sciences. 2nd ed.

63. Amended Protocol: Interventions for Breathlessness in Patients with Advanced Cancer (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/dyspnea-protocol-amended.pdf
    May 19, 2020 - Statistical significance (will be set at a two-sided alpha of 0.05). … We will evaluate statistical heterogeneity among studies using an I2 statistic, and anticipate statistical … A I2 value greater than 50% will be considered as substantial statistical heterogeneity. … Statistical power analysis for the behavioral sciences. Hillsdale, NJ: L.

64. Carbohydrate-Intake-Prepub-Final-Research-Table-Rct (xls file)
    effectivehealthcare.ahrq.gov/sites/default/files/related_files/carbohydrate-intake-prepub-final-research-table-rct.xlsx
    May 29, 2025 - For yes: overall <20% For yes: per group <10% loss to follow up For yes: explains and uses relevant statistical

65. Disposition of Comments CER 214 Stroke Prevention in Patients With Atrial Fibrillation (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/related_files/cer-214-afib-disposition-comments.pdf
    October 30, 2019 - The ITT approach provides valid statistical tests of no treatment difference hypotheses. … This inconsistency has been fixed and we now consistently note whether statistical significance was … , or statistical significance, does not measure the size of an effect or the importance of a result … The prognostic studies of course have the time element but may also have statistical issues (e.g., … This can give the impression that statistical analysis has shown that the apparent difference is not

66. Evidence-based Practice Center Systematic Review Protocol (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/related_files/breast-cancer-medications_disposition-comments.pdf
    March 10, 2010 - The wording of the sentence should be changed to reflect lack of statistical significance. … I think that this leaves the impression that statistical significance is equivalent to precision of … estimation (including statistical significance). … In other words, the paragraph is conflating hypothesis testing (i.e., statistical significance) with … examined statistical precision. We clarified this in the text.

67. Slide 1 (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/johnson_-ahrq-mcda-presentation.pdf
    August 27, 2012 -  Statistical model estimates preference weights consistent with observed choices. … – Surrogate markers – Risk concepts  Consensus among researchers – Experimental design – Statistical

68. AHRQ Slide Template 2009 (ppt file)
    effectivehealthcare.ahrq.gov/sites/default/files/presentation.ppt
    August 01, 2009 - To become familiar with approaches to graphical presentations of findings not synthesized through statistical … population, interventions, and outcomes Methodological heterogeneity — variation in study design Statistical … Various statistical models are useful for identifying the level of heterogeneity between studies. … Evidence maps are another way to present data graphically without synthesizing them quantitatively through statistical … Statistical significance status in the primary studies could be based on different analyses (e.g., haplotype-based

69. Acs-Pci-Adjunctive-Devices Research-Protocol (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/acs-pci-adjunctive-devices_research-protocol.pdf
    July 01, 2010 - population, setting, interventions, and comparison groups; appropriate measurement of outcomes; appropriate statistical … confidence intervals will be calculated by using a DerSimonian and Laird random-effects model.9 Statistical … appropriate in all situations, an I2 value of >50 percent has been regarded as representative of important statistical … to assess for the presence of publication bias.10 Statistics will be performed by using StatsDirect statistical … sizes were on the same side of unity; whether the range of effect sizes was narrow, and the degree of statistical

70. Evidence-based Practice Center Systematic Review Protocol (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/hepatitis-c-screening_research-protocol.pdf
    October 20, 2011 - ascertaining exposures, potential confounders, and outcomes; and whether they performed appropriate statistical … appropriateness of meta-analysis, we will consider the clinical and methodological diversity and assessed statistical … We will use standard  2 tests to assess the presence of statistical heterogeneity among studies and … Statistical heterogeneity will be explored by using subgroup analysis or meta-regression. … When statistical meta-analysis is not possible, we will group studies by similarity of intervention

71. S44 (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/s44.pdf
    October 01, 2007 - The Researchers’ Domain: Grant Funding, Ethics Approval, Statistical Analyses Funding and Ethics Review … size and stopping rules, participant flow, recruitment, baseline data Researcher Grant proposals with statistical … run scientific advisory panel, matching and blocking, randomization methods, blinding of analysis, statistical … analyses, assess generalizability, overall interpretation, publication of findings Hypotheses and statistical … expected the policy would not be targeted by income, so we prepared instead to do the targeting in our statistical

72. Appendicitis Research-Protocol (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/appendicitis_research-protocol.pdf
    December 09, 2013 - We will not base the decision to perform a meta-analysis on statistical criteria for heterogeneity. … For all statistical tests, except those for heterogeneity, statistical significance will be defined … For reporting bias, we will make qualitative dispositions rather than perform formal statistical tests … Appropriate statistical methods are required to assess diagnostic tests for replacement, add-on, and … Diagnostic statistical procedures in medical meta-analyses. Stat Med. 1999 Sept;18(17-18):2331-41.

73. Rapid Evidence Product: Adverse Events Associated With COVID-19 Pharmaceutical Treatments (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/related_files/COVID-19-pharmaceutical-treatments-rapid-review.pdf
    March 01, 2024 - Certainty of evidence is insufficient due to risk of bias, lack of statistical significance, extremely … Certainty of evidence for bleeding events is insufficient due to lack of statistical significance, lack … Lack of statistical significance and conflicting results lead to a certainty rating of insufficient … The risk of certainty was rated moderate due to statistical significance and precision. … Certainty of evidence is limited due to lack of statistical significance 30 and risk of bias

74. Grades-Predictive-Values White-Paper-2015 (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/grades-predictive-values_white-paper-2015.pdf
    January 01, 2015 - We determined qualitative concordance based on a 2-tiered approach incorporating changes in statistical … Statistical significance did not change, and 2. … In other words, we did not consider cases in which a p-value changed statistical significance within … In other words, in 64 percent of comparisons either the statistical significance changed between first … Statistical Power Analysis for the Behavioral Sciences (2nd Ed.).

75. Methods-Guidance-Reporting-Bias Methods (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/methods-guidance-reporting-bias_methods.pdf
    November 01, 2013 - The Statistical Review describes key statistical issues and findings that affect conclusions regarding … In addition to the primary endpoint analysis, the statistical reviewer may also address secondary or … The Drugs@FDA site may be searched by the generic or trade drug name (not drug class) for Statistical … Primary and secondary endpoints, primary endpoint results, statistical analysis, and statistical significance … Publication decisions revisited: the effect of the outcome of statistical tests on the decision to

76. Methods Guide for Medical Test Reviews Chapter 12 (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/methods-guidance-tests-prognostic_methods.pdf
    July 01, 2012 - separate estimates of the treatment effect in subgroups defined by the predictve test, along with a statistical … Each phase of development is focused on different types of questions, research designs, and statistical … Research issues and strategies for genomic and proteomic biomarker discovery and validation: a statistical … The statistical evaluation of medical tests for classification and prediction.

77. Appendix F 0 (xls file)
    effectivehealthcare.ahrq.gov/sites/default/files/related_files/Appendix%20F_0.xlsx
    October 08, 2025 - Did the Study Perform Appropriate Statistical Analyses on Potential Confounders (i.e., Age, Sex, Other

78. Evidence-based Practice Center Systematic Review Protocol (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/related_files/ptsd-5-protocol-update-2023.pdf
    January 01, 2023 - civilians2,3 and seven to nine percent in Veterans.4,5 Since PTSD was first included by the Diagnostic and Statistical … symptoms or symptom clusters without overall PTSD outcome • Studies that did not perform formal statistical … Statistical Analysis Method 5. Adjusted Variables in Statistical Analysis 6. … Statistical Analysis Method 6. Adjusted Variables in Statistical Analysis 7.

79. Evidence Report No. 222, Data Linkage Strategies To Advance Youth Suicide Prevention (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/suicide-prevention_research.pdf
    October 01, 2016 - Which statistical methods are reliable and valid for analyzing linked national, State, and community … What are potential sources of bias for these statistical methods? b. … What are potential sources of bias for these statistical methods? b. … What are potential sources of bias for these statistical methods? b. … Statistical Abstracts of the United States. Washington, D.C: US Census Bureau; 2015.

80. Evidence-based Practice Center Systematic Review Protocol (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/case-management_research-protocol.pdf
    June 06, 2011 - methods for ascertaining exposures, potential confounders, and outcomes; and whether appropriate statistical … appropriateness of meta-analysis, we will consider the clinical and methodological diversity and assessed statistical … We will assess the presence of statistical heterogeneity among studies by using standard 2 tests … Statistical heterogeneity will be explored by using subgroup analysis or meta-regression. … When statistical meta-analysis is not possible, we will group studies by similarity of intervention