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Total Results: 969 records

Showing results for "design sample size".

301. 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 - Results of stratified analyses based on sample size, risk of bias, and magnitude of effect estimates … To determine the influence of risk of bias, sample sizes of first and pooled subsequent trial, and the … Sample sizes of the first trials varied greatly (from 20 to 46,500 participants; median 112) and often … Results of stratified analyses based on sample size, risk of bias, and magnitude of effect estimates … Influence of trial sample size on treatment effect estimates: meta- epidemiological study.

302. Evidence-based Practice Center Systematic Review Protocol (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/treatment-resistant-depression_disposition-comments.pdf
     September 01, 2011 - sizes or give some other indicator of precision. … We agree, and we have added a sample size column to these summary tables. … George 2005; Excluded from KQ2 for wrong study design (observational study). … sizes or give some other indicator of precision. … We agree, and we have added a sample size column to these summary tables.

303. S96 (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/s96.pdf
     October 01, 2007 - Findings from NEISS-CADES can help design and prioritize patient safety interventions for outpatient … attributes (acceptability, flexibility, representativeness, simplicity, and stability) based on the system’s design … between reporting steps Sensitivity Proportion of true cases detected Limitations Simplicity System design … The NEISS sample (design and implementation) 1997 to present. … Epidemiology: Study Design and Data Analysis. 2nd ed.

304. AHRQ Slide Template-Widescreen
     effectivehealthcare.ahrq.gov/sites/default/files/wysiwyg/pdf/epc-child-adolesc-mental-health-grand-rounds.pptx
     May 22, 2025 - Brief Assessment Tools Characteristic Range Across Studies Risk of Bias 1 low, 9 moderate, 8 high Sample … Size 50-2,512 (8-489 with OCD) Mean Age Range 9-16 Male 32%-71% White 88%-98% Source outpatient … Was a case-control design avoided? Did the study avoid inappropriate exclusions? … intervention/exposure and comparison (n=176) or outcomes (n=83) were not of interest, if the study design … Our review identified important gaps in the literature to inform future research design.

305. Disposition of Comments Report for Strategies To Reduce Cesarean Birth in Low-Risk Women (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/cesarean-birth-2010_disposition-comments.pdf
     January 01, 2010 - The major impact is on the design and assessment of future research . … The issue of adequate sample size in individual studies was not well described, e.g. notation of whether … or not each study's sample size was base on an appropriate power analysis. … The focus on over sample size vs a criterion of power analysis base on primary outcome should be rethought … The 2 issues of mixed parity and sample size determination via power analysis were appropriately addressed

306. Appendicitis Executive (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/appendicitis_executive.pdf
     December 01, 2015 - size cutoff (48) No human subjects (4) No primary data (922) No reference standard or reference standard … Nine of the studies had a paired design and 44 had a parallel-group design. … Four of the studies had a paired design and four had a parallel-group design. … Many had sample sizes that were too small to reliably detect small or moderate differences between … • In contrast to the RCTs, NRCSs of alternative testing strategies attained large sample sizes but

307. Disposition of Comments_Comparative Effectiveness Review No. 272_Genitourinary Syndrome of Menopause: A Systematic Review (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/cer-272-genitourinary-syndrome-disposition-comments.pdf
     July 31, 2024 - Shelton Nutrition Counselor, Emergence Functional Nutrition Alvin, TX General I agree that sample … size was not large enough, nor was duration of study long enough to determine harms. … captured this article and it was evaluated for eligibility, however it was excluded due to study design

308. Methods Guide for Comparative Effectiveness Reviews - Avoiding Bias in Selecting Studies (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/methods-guidance-bias_methods.pdf
     February 01, 2013 - Reviewers may decide to restrict study inclusion based on sample size (e.g.,> 1,000 patients) or publication … match studies in gray literature documents based on characteristics such as unique study identifies, sample … size (by group), and study duration, to those found in published literature to remove any duplicates … Because the study is registered at the beginning of the study, the intended primary outcome measures, sample … size, and other trial characteristics are known prior to reading reports of results.

309. Research Protocol: Breast Reconstruction After Mastectomy (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/breast-reconstruction-mastectomy-protocol.pdf
     April 09, 2020 - the remaining 19 percent of patients receive AR.4 IBR can be further divided based on the physical design … versus no chemotherapy Timing • Any Setting • Any, including single- and multicenter Design … Timing • Any Page 13 of 24 Setting • Any, including single- and multicenter Design … there are no eligible citations identified in a consecutive sample of 370 consecutive citations (this sample … size chosen because the upper 97.5% confidence interval bound for a proportion of 0/370 is less than

310. Colorectal-Cancer-Protocol_130520 (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/colorectal-cancer-staging_research-protocol.pdf
     May 20, 2013 - Study Design Criteria Single test performance. … For questions about test performance, studies of any design—randomized, cross-sectional, case-control … Any study design, including modeling, will be acceptable for inclusion for questions about harms. … Empirical evidence of design-related bias in studies of diagnostic tests. … Was an a priori design or protocol provided? 2. Was a comprehensive search strategy performed?

311. head-neck-cancer-update-140204 (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/head-neck-cancer-update_research-protocol.pdf
     February 04, 2014 - may vary by KQ, but, the tables will contain common elements such as author, year of publication, sample … size, study type, intervention(s), and comparator(s). … certainty surrounding an effect estimate with respect to a given outcome, based on the sufficiency of sample … size and number of events. … Therefore study questions, design and/or methodological approaches do not necessarily represent the

312. Comparative Effectiveness of Strategies to De-escalate Aggressive Behavior in Psychiatric Patients in Acute Care Settings (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/aggression_executive.pdf
     October 01, 2016 - Their inputs addressed points such as sample size thresholds for eligible studies and whether and how … sizes, attrition, settings, geographic locations, and study funders. … size).64 Time to OAS improvement 20 Insufficient Low risk of bias, consistency unknown—single … size).64 11 Intervention and Comparison Primary Outcome of Interest Outcome N of Patients … sizes for comparative trials of these types of interventions (perhaps apart from medication protocols

313. Integrating Stakeholder Preferences in Comparative Effectiveness Research: Potential Uses of Multi-Criteria Decision Analysis Techniques (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/mcda_webinar_transcript2.pdf
     August 27, 2012 - sizes for MCDA? … We don’t need any sample sizes here. … In general, sample size has to do with the precision of the estimate score, the weights, and I am not … That determines the sample size. … JOHNSON: Can I very quickly followup on a question that was asked earlier on sample size, how many

314. Assessing Applicability (ppt file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/assessing-applicability.ppt
     January 01, 2009 - Experimental and quasi-experimental design for generalized causal inference. … size to assess minimally important differences from a patient perspective Use intention-to-treat analysis … duration and clinically relevant treatment modalities Assess for adverse events Have an adequate sample … size to assess minimally important differences from a patient perspective Use intention-to-treat analysis … Experimental and quasi-experimental design for generalized causal inference.

315. Cell-Free-Dna-Appendix-C-Prepub-Final (xls file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/cell-free-dna-appendix-c-prepub-final.xlsx
     January 01, 2025 - History of Cancer Other Relevant Population Characteristics Control Population Description Total Study Sample … Size Enrolled at Baseline Cancer Confirmation With Tissue/Specimen Diagnosis Followup Length (In Diagnostic … Salat, 2022 No No Yes High concerns Case-control design using a convenience sample. … Were all restrictions in eligibility criteria based on study characteristics appropriate (e.g., date, sample … size, study quality, outcomes measured)?

316. Cell-Free-Dna-Final-App-C (xls file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/cell-free-dna-final-app-c.xlsx
     January 01, 2025 - History of Cancer Other Relevant Population Characteristics Control Population Description Total Study Sample … Size Enrolled at Baseline Cancer Confirmation With Tissue/Specimen Diagnosis Followup Length (In Diagnostic … Salat, 2022 No No Yes High concerns Case-control design using a convenience sample. … Were all restrictions in eligibility criteria based on study characteristics appropriate (e.g., date, sample … size, study quality, outcomes measured)?

317. Disposition of Comments for CER 167 Renal Masses (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/renal-cancer_disposition-comments.pdf
     February 24, 2016 - opinions and the best studies available at the time, which were observational and retrospective in design … EORTC is an exception due to its randomized control trial design with the most valid analysis being … Precision is based more on sample size and number of studies. … Heterogeneity in study design and reported outcomes prevent meta-analysis. … Specifically, each study had different study design and follow- up times.

318. Hypertension-Pulmonary-Arterial Executive (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/hypertension-pulmonary-arterial_executive.pdf
     April 01, 2013 - , in particular including those related to administration or monitoring of treatment; whether the sample … size was sufficient to assess minimally important differences from a patient perspective; and the use … elevated sPAP by echocardiography;24 however, this finding is limited by the lack of replication, small sample … size (wide confidence limits) and confounding with RV strain on ECG. … Finally, the studies that compared combination therapy with monotherapy were all of similar design,

319. Cerebral-Palsy-Feeding Executive (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/cerebral-palsy-feeding_executive.pdf
     March 01, 2013 - Effects on eating efficiency and swallowing were not consistent, and the small sample sizes suggest … sizes. … sizes. … sizes. … sizes.

320. Depression-Postpartum-Screening Executive (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/depression-postpartum-screening_executive.pdf
     May 01, 2013 - Sample size ranged from 99 recruited at a single site to 4,084 enrolled from 101 practices. … was a cross-sectional study, one was a pre-post intervention study, one was a quasi-experimental design … Defining sample size for the study based on detecting clinically relevant differences in test performance … here is between the increased generalizability of having subjects take a single test versus overall sample … size. 5.