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Showing results for "estimates".

1. Development of a Software Tool for Obtaining Doubly Robust Estimate of Treatment Effects | Effective Health Care Program
   effectivehealthcare.ahrq.gov/products/treatment-effects-estimates-tool
   December 02, 2009 - Development of a Software Tool for Obtaining Doubly Robust Estimate of Treatment Effects Timeline January 01, 2005 Topic Initiated December 02, 2009 Research Report Development of a Software Tool for Obtaining Doubly Robust Estimate of Treatment Effects

2. Development of a Software Tool for Obtaining Doubly Robust Estimate of Treatment Effects | Effective Health Care Program
   effectivehealthcare.ahrq.gov/products/treatment-effects-estimates-tool/research
   December 02, 2009 - We have developed a simple SAS® macro for obtaining doubly robust estimates.

3. Executive Summary_Comparative Effectiveness Review No. 273_Treatment of Stages I-III Squamous Cell Anal Cancer: A Systematic Review (pdf file)
   effectivehealthcare.ahrq.gov/sites/default/files/related_files/cer-273-anal-cancer-executive-summary.pdf
   August 01, 2024 - late harms 1; RCT; n=585 No significant difference, imprecise estimates. … Moderate DM (up to 5 yrs) 1; RCT; n=682 No significant difference, precise estimates. … Low PFS, CR 1; RCT; n=940 No significant difference, precise estimates. … Low Late harms 1; RCT; n=682 No significant difference, imprecise estimates. … Low Acute derm, GI, GU harms 1; RCT; n=144 No significant difference, imprecise estimates.

4. Change Score or Followup Score? An Empirical Evaluation of the Impact of Choice of Mean Difference Estimates | Effective Health Care (EHC) Program
   effectivehealthcare.ahrq.gov/products/choice-of-mean/white-paper
   April 20, 2015 - An Empirical Evaluation of the Impact of Choice of Mean Difference Estimates White Paper April 20, … using either the change score from the baseline or the followup scores would produce biased effect estimates … of mean difference, while the ANCOVA model provides the least biased estimates. … also evaluated whether the impact qualitatively varied by the comparator and alternative random effect estimates … Choice of mean difference estimates could impact meta-analysis conclusions.

5. Suppl-1-User-Guide-To-Ocer 130129 (pdf file)
   effectivehealthcare.ahrq.gov/sites/default/files/suppl-1-user-guide-to-ocer_130129.pdf
   January 01, 2011 - 161 Abstract The identification process is an a priori assessment of the treatment effect estimates … Risk adjustment (RA) methods produce these estimates. … Assumptions Required To Yield Unbiased Estimates For RA estimators to yield unbiased estimates of … of ATT from RA estimators or estimates of LATE from IV estimators. … Understanding instrumental variables estimates of treatment effects.

6. Alcohol | Effective Health Care (EHC) Program
   effectivehealthcare.ahrq.gov/health-topics/alcohol
   April 20, 2015 - An Empirical Evaluation of the Impact of Choice of Mean Difference Estimates White Paper

7. S123 (pdf file)
   effectivehealthcare.ahrq.gov/sites/default/files/s123.pdf
   October 01, 2007 - ORIGINAL ARTICLE Heterogeneity and the Interpretation of Treatment Effect Estimates From Risk Adjustment … Results: Risk adjustment models yielded average survival estimates similar to trial results. … and these estimates varied with the instrument specification. … Including both instruments in the specification yielded estimates between the estimates found with the … Understanding instrumental variables estimates of treatment effects.

8. Empirical Assessment of Within-Arm Correlation Imputation in Trials of Continuous Outcomes | Effective Health Care (EHC) Program
   effectivehealthcare.ahrq.gov/products/continuous-outcomes-correlation/research
   November 19, 2012 - data reported, and simulates the effect of using different correlation values on meta-analysis summary estimates … We assessed the bias on estimates of within-group change SEs by comparing reported SEs with imputed SEs … We simulated meta-analyses, assessing the bias, coverage, and accuracy of the summary estimates derived … Imputing values in meta-analyses where some or all within-group correlation estimates are not reported

9. SAS.doc (pdf file)
   effectivehealthcare.ahrq.gov/sites/default/files/pdf/treatment-effects-estimates-tool_research.pdf
   April 18, 2007 - We have developed a simple SAS® macro for obtaining doubly robust estimates. … Specifically, one estimates the probability that a particular patient receives a given treatment as

10. Research White Paper - Assessing the Predictive Validity of Strength of Evidence Grades: A Meta-Epidemiological Study (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/grades-predictive-values_white-paper.pdf
    September 01, 2015 - For each of the 160 documents, we determined whether estimates remained stable as subsequent studies … Thus, we used these estimates as “gold standards” to determine the predictive validity. … estimates of the gradeable documents with the high SOE estimates from the Cochrane reports (the gold … Conversely, substantially more low or insufficient SOE estimates than expected remained stable. … The circles in the columns reflect the point estimates.

11. Change Score or Followup Score? An Empirical Evaluation of the Impact of Choice of Mean Difference Estimates | Effective Health Care Program
    effectivehealthcare.ahrq.gov/products/choice-of-mean
    April 20, 2015 - An Empirical Evaluation of the Impact of Choice of Mean Difference Estimates Timeline … An Empirical Evaluation of the Impact of Choice of Mean Difference Estimates

12. 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 - Modified Bland-Altman diagram comparing the point estimates of the first trials with the point estimates … Assessing Concordance in Effect Estimates To assess the concordance or discordance of effect estimates … between the point estimates of first trials and point estimates of the pooled subsequent trials was … 4 displays a modified Bland-Altman diagram comparing point estimates of first trials with point estimates … Modified Bland-Altman diagram comparing the point estimates of the first trials with the point estimates

13. An Empirical Assessment of Bivariate Methods for Meta-Analysis of Test Accuracy (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/bivariate-methods-utility_research.pdf
    November 01, 2012 - Overall, point estimates from the two methods are similar, however the uncertainty around the estimates … BREMA estimates obtained from ML methods; interval estimates from the posterior distribution with … to obtain the graph*/ matrix estimates = e(b) local beta_sroc_unweighted = estimates[1,1] local … = estimates[1,1] local alpha_sroc_weighted = estimates[1,2] local a_w = `alpha_sroc_weighted'/( … = e(b) matrix variances = e(V) local mean_se = estimates[1,1] local mean_sp = estimates[1,2

14. An Empirical Assessment of Bivariate Methods for Meta-Analysis of Test Accuracy | Effective Health Care (EHC) Program
    effectivehealthcare.ahrq.gov/products/bivariate-methods-utility/research
    November 19, 2012 - Fixed effects univariate analyses produced estimates with narrower confidence intervals compared to random … Methods using the normal approximation (both univariate and bivariate, inverse variance and ML) produced estimates … Point estimates from univariate and bivariate random effects meta-analyses were similar when performing … Fitting the bivariate model using ML and fully Bayesian methods produced almost identical point estimates … sensitivity and specificity; however, Bayesian results indicated additional uncertainty around summary estimates

15. S166 (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/s166.pdf
    October 01, 2007 - Results: Estimates for comparisons tended to be clinically and statistically similar across methods. … Estimates obtained through indirect comparisons were not biased and were similar to those obtained through … than of direct estimates (assuming similar sample sizes). … Perhaps we need not have been so modest in our presentation of these earlier indirect estimates. … �ib � Normal�0,10000 Prior distribution for study level estimates.

16. Alcoholism and Alcohol Abuse | Effective Health Care (EHC) Program
    effectivehealthcare.ahrq.gov/health-topics/alcoholism-and-alcohol-abuse
    January 17, 2012 - An Empirical Evaluation of the Impact of Choice of Mean Difference Estimates White Paper

17. Supplemental Project To Assess the Transparency of Reporting for Trials Evaluating Treatment for Infertility | Effective Health Care (EHC) Program
    effectivehealthcare.ahrq.gov/products/transparency-infertility/research
    June 28, 2017 - Protocol: Management of Infertility (2015) Background and Objectives Selective reporting can bias estimates … CT.gov for detecting selective reporting, and to determine the impact of selective reporting on the estimates

18. 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 - comprehensively and systematically review and compare empirical evaluations of specific types of bias on effect estimates … Some studies concerned the effect of more than one type of bias on effect estimates. … When the bias was present, commonly the treatment effect was increased, but rarely were the estimates

19. Quantitative Synthesis: Chapter 5. Network Meta-Analysis (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/ehc-presentation-quantitative-synthesis-chapter-5.pdf
    February 01, 2018 - Learning objective Network meta-analysis • Decision-makers want head-to-head estimates of different … for the same treatment comparison.3,4 ► In closed loops, direct and indirect estimates of treatment … • The simple indirect comparison approach is to qualitatively compare the point estimates and overlap … ► The approach involves presenting the 3 estimates for each comparison (direct, indirect, and network … estimates), then rating strength of evidence separately fore ach one. 13.

20. Methods Guide for Medical Test Reviews Chapter 9 (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/methods-guidance-tests-performance_methods.pdf
    July 01, 2012 - “imperfect” reference standard), the typical (“naïve”) estimates of sensitivity and specificity are … Qualify the interpretation of naïve estimates of the index test’s performance. … of the bias of these naïve estimates. … Adjust or correct the naïve estimates of sensitivity and specificity. … the naïve estimates of sensitivity and specificity in the ROC space (see Figure 9–3).