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Showing results for "sample".

141. Plant-Based-Chronic-Pain-Appendix-G (xls file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/plant-based-chronic-pain-appendix-g.xlsx
     January 12, 2021 - Risk of bias of cannabis cohort studies Author, year Did the study attempt to enroll all (or a random sample

142. 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-executive-summary.pdf
     July 01, 2024 - • Harms reporting was limited by sample sizes and short followup duration though most studies did … focused on natural products (i.e., herbal or botanical supplements and vitamins) and were small in sample … trials did not provide adequate statistical reporting) dDowngraded one level for imprecision (total sample … level for imprecision (SD crosses no-effect threshold) fDowngraded two levels for imprecision (total sample

143. Observational Studies: Empirical Evidence of Their Contributions to Comparative Effectiveness Reviews (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/observational-studies_white-paper.pdf
     December 01, 2013 - We selected a 25 percent sample of the most recent eligible CERs. … Our final sample included 23 CERs published since November 2012. … We selected a 25 percent sample of the eligible CERs, based on most recent date of publication, due … From the eligible CERs, we initially selected a sample of 25 percent of the most recently published … Finally the subgroup analyses are based on a small sample size.

144. 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 - In this sample, the EPC approach to GRADE could not reliably predict the likelihood that individual … our study was to determine the predictive validity of the EPC approach to GRADE based on a diverse sample … For example, in about 20 percent of our sample (presented in Table 1), confidence intervals cross both … Second, how representative our sample is remains unclear. … In addition, our sample was limited to RCTs, so findings are likely not generalizable to research based

145. Calcineurin_Inhibitors_Protocol_FINAL_10-07-2014 (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/calcineurin-inhibitor_research-protocol.pdf
     October 08, 2014 - for inclusion, but retrospective studies must use consecutive enrollment or enrollment of a random sample … Duplicate abstraction on a 10-percent random sample will be used to ensure accuracy. … ionization to analyze molecules; effective in detecting therapeutic levels of drugs in a biologic sample … Sample of Search Strategy Table A-1. … Sample Risk of Bias Items ECRI Risk of Bias Item List for Controlled or Comparative studies 1.

146. Dispostion of Comments Report for Child and Adolescent Exposure to Trauma (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/trauma-child-interventions_disposition-comments.pdf
     February 11, 2013 - compared one type of treatment with another, a wait-list control, or no treatment/placebo using a sample … Overall the report demonstrated the large gaps in knowledge, the small sample sizes, the lack of replication … clinical research in the trauma area) but I would not have much confidence in any study with small sample … Getting larger sample sizes in this area would be difficult because larger samples are quite costly … Sample size should have been given much greater weight in determination of strength of evidence.

147. Self-Measured Blood Pressure: Future Research Needs (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/measuring-blood-pressure-future_research.pdf
     August 01, 2012 - Sample Size for a Randomized Controlled Trial for a Composite CVD Outcome Appendixes ....... 13 … This would require smaller sample sizes than for trials with CVD outcomes as the effect sizes would … An additional approach to decrease the necessary sample size would be to exclude individuals with a … Resource Use, Size, and Duration An RCT, especially one with a long duration and large sample size, … Sample size for a randomized controlled trial for a composite CVD outcome Total sample size for an

148. PREGNANCY, INCLUDING PRETERM BIRTH #12 (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pregnancy_hi_impact.pdf
     January 01, 2012 - A new blood test takes a sample of maternal blood during the first trimester in pregnant women interested … “Fetal Nucleic Acid Technology” to detect and isolate circulating fetal DNA from a maternal blood sample … “Fetal Nucleic Acid Technology” to detect and isolate circulating fetal DNA from a maternal blood sample … Sequenom states that circulating fetal DNA can be obtained from a maternal blood sample very early … comfort relative to invasive tests, and the ability of most any physician’s office to perform blood sample

149. Research White Paper: A Framework To Facilitate the Use of Systematic Reviews and Meta-analyses in the Design of Primary Research Studies (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/primary-research-design_research.pdf
     January 01, 2012 - Goudie, et al. assessed a sample of randomized controlled trials (RCTs) published in leading medical … Several publications have proposed methods which can be used to simulate sample size calculations and … Does the proposed study have adequate sample size and power? … Insufficient data: too few primary studies, or studies that are too small (sample size inadequate or … Evidence-based sample size calculations based upon updated meta-analysis.

150. Layout 1 (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/cancer-radiation_executive.pdf
     November 01, 2009 - 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 … Most eligible studies were noncomparative in nature and had small sample sizes.

151. Transparency of Reporting Requirements: Tympanostomy Tubes | Effective Health Care (EHC) Program
     effectivehealthcare.ahrq.gov/products/transparency-tympanostomy/research-protocol
     September 03, 2016 - This spreadsheet will capture basic intervention, outcome, study design, sample size, and whether results … evidence map to include data on study design, intervention type and duration, population, outcomes, and sample … We quantify such impact as a potential increase in total study population sample size (>20%), a change … Estimating effect size under publication bias: small sample properties and robustness of a random effects … With input from the TEP, study-design and sample-size filters will be implemented, as needed, to contain

152. 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 … evidence map to include data on study design, intervention type and duration, population, outcomes, and sample … We quantify such impact as a potential increase in total study population sample size (>20%), a change … Estimating effect size under publication bias: small sample properties and robustness of a random effects … With input from the TEP, study-design and sample-size filters will be implemented, as needed, to contain

153. Evidence Report on the (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/pelvic-pain_research-protocol.pdf
     February 16, 2011 - • Loss to followup: varies by study; to maximize acceptable sample size, we will assume 0 percent … • Statistic: use the two-tailed z-test and the t-test for sample size. … • Sample size: for an RCT with 2 groups, with 100 percent meeting the diagnostic criteria for CPP … • Null hypothesis of effect size of 50 percent: need 64 subjects per study group; a total sample … • Null hypothesis of effect size of 30 percent: need 176 subjects per group; a total sample size

154. Future Research Needs for Treatment of Obstructive Sleep Apnea (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/sleep-apnea-treatment-future_research.pdf
     February 01, 2012 - Sample Discussion Thread: Treatment ................................................................. … Sample Size Calculation for an RCT of Behavioral Interventions To Improve Compliance With CPAP, MAD, … We specifically considered the feasibility of the research questions focusing on potential sample size … size in the thousands, while using surrogate outcomes would need smaller sample sizes. … size in the thousands, while using surrogate outcomes would need smaller sample sizes.

155. Microsoft Word - Comparative_Effectiveness_Research_Review_Disposition_of_Comments_Report_Final_120710_refs_delinked1.docx (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/autism_disposition-comments.pdf
     November 01, 2010 - With the assistance of our technical experts, we selected a minimum sample size of 10 in order to maximize … of the Autism Diagnostic Interview - Revised in 2003 allowed researchers to introduce metrics of sample … We have added rationale about our decisions regarding sample size to the Methods section of the review … Thank you for your comment Methods It was not clear from the EPC report why 10 was used as a sample … By admitting "case study and case-control designs" but excluding all "behavioral studies with sample

156. Disposition of Comments Report for Testing of CYP2C19 Variants and Platelet Reactivity for Guiding Antiplatelet Treatment (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/antiplatelet-treatment_disposition-comments.pdf
     September 25, 2013 - We agree that number of studies and sample size of each can affect the performance of heterogeneity … The blood sample is further centrifuged at higher speed to isolate platelet poor plasma (PPP). … Manipulation Required Prior to Measurement; Sample Matrix; Materials Required; Pre-analystic Sample … • Differences in sample matrix. LTA uses plasma; VASP and VerifyNow use whole blood. … • Sample transport (the VerifyNow test is point‐of‐care and can be performed at the location of sample

157. Assessing Equivalence and Noninferiority | Effective Health Care (EHC) Program
     effectivehealthcare.ahrq.gov/products/equivalence/research
     June 22, 2012 - The second project assessed the methodology used for a random sample of 50 recent systematic reviews

158. 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 will present sample code and results from analyses of simulated data.

159. PREGNANCY, INCLUDING PRETERM BIRTH #12 (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/12_pregnancy_potential_high_impact_june_2012.pdf
     January 01, 2012 - uses Fetal Nucleic Acid Technology to detect and isolate circulating fetal DNA from a maternal blood sample … Sequenom states that circulating fetal DNA can be obtained from a maternal blood sample very early … using Fetal Nucleic Acid Technology to detect and isolate circulating fetal DNA from a maternal blood sample … Sequenom states that circulating fetal DNA can be obtained from a maternal blood sample very early … comfort relative to invasive tests, and the ability of most physician’s offices to perform blood sample

160. Disposition of Comments_Comparative Effectiveness Review No. 256: Effectiveness of Telehealth for Women's Preventive Services (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/cer-256-telehealth-women-disposition-comments.pdf
     June 16, 2022 - marginalized populations, for example in the excluded study Glass et al., approximately 40% of the sample … They are not a representative sample of the broader patient base. … And ignores unrepresentativeness of sample who participate in telehealth studies. … and national NZ sample) is problematic as the review includes two later studies that are examining … They are not a representative sample. Issue now addressed.