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Showing results for "design sample size".

121. Methods Guide for Comparative Effectiveness Reviews - Expanded Guidance on Selected Quantitative Synthesis Topics (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/quantitative-synthesis-expanded-methods_methods.pdf
     March 01, 2013 - size requirements, that approach may lead to serious misinterpretation of the data. … In meta-analysis, sample size is less of a concern than in clinical trials, and thus the motivation … size. … Types of studies included Study design Specify what type of study designs are being combined (e.g … size, intervention, outcome, study design, target population, study population, baseline risk and other

122. Pharmacologic and Nonpharmacologic Treatments of Posttraumatic Stress Disorder (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/ptsd-repository-expanded-protocol.pdf
     October 24, 2019 - , the following PICOTS (Populations, Interventions, Comparators, Outcomes, Timing, Settings, Study Design … on study duration or length of followup • Settings: o No limitation on study setting • Study Design … , year, setting, country, sample size, eligibility criteria, source(s) of funding, study characteristics … Characteristics of included studies, such as number of publications by year, study sample size, proportion … Study design l. Indicate if subscale or symptom cluster data is reported (Y/N) m.

123. Evidence-based Practice Center Systematic Review Protocol (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/cad-women-diagnosis_research-protocol.pdf
     June 06, 2011 - systemic fibrosis, anaphylaxis, and arrhythmias—and how these events vary by demographic factors Sample … size We will not exclude articles based on sample size during the full-text screening but may revisit … We will design the data abstraction forms for this project to collect the data required to evaluate … Study design will be considered when grading quality. … Therefore, study questions, design, and/or methodological approaches do not necessarily represent the

124. uterine-fibroids-protocol-160301 (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/uterine-fibroids_research-protocol.pdf
     March 01, 2016 - bleeding symptoms.17 Furthermore, as the literature evolves, including larger studies of stronger design … We may include in the analysis high of risk of bias studies that have a large sample size or that evaluate … Many fibroid studies have small sample sizes, which limit the ability of a study to overcome differences … will use established concepts of the quantity of evidence (e.g., numbers of studies, aggregate ending-sample … sizes), the quality of evidence (from the quality ratings on individual articles), and the coherence

125. Plasma-Cell-Dyscrasias-Sflc-Assay Executive (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/plasma-cell-dyscrasias-sflc-assay_executive.pdf
     August 01, 2012 - Followup times varied from 3 months to 13 years, with sample sizes of 40 to 399 patients. … / spectrum bias as well as (in one study) small sample size. … without adjustments for potential confounders and as C in the other five studies because of their small sample … sizes, limited information about study design, and/or potential selection bias. … Studies should have an a priori calculation of the sample size needed to determine the desired precision

126. Infantile-Hemangioma Executive (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/infantile-hemangioma_executive.pdf
     January 01, 2016 - The evidence was limited by low sample size, lack of comparisons of the same modalities, and variations … Due to low sample size and limitations in reporting, pain and scarring were found to have insufficient … For Nd:YAG and carbon dioxide lasers, all studies were severely limited by sample size, and strength … Due to low sample size and limitations in reporting, pain and scarring were found to have insufficient … sizes.

127. Disposition of Comments for Interventions for Adolescents and Young Adults With Autism Spectrum Disorders (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/autism-adolescents_disposition-comments.pdf
     August 27, 2012 - The only excluded study design was the single case report. … With the assistance of our content and technical experts, we selected a minimum sample size of 20 in … allows us to account for typically smaller study sizes in ASD research while including studies with sample … sizes large enough to suggest effects of interventions. … With the assistance of our content and technical experts, we selected a minimum sample size of 20 in

128. Disposition of Comments Report for Comparison of Characteristics of Nursing Homes and Other Residential Long-Term Care Settings for People With Dementia (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/dementia-nursing-home-characteristics_disposition-comments.pdf
     October 23, 2012 - Sometimes an adequate sample size is difficult to achieve because an outcome under study (such as aggressive … Sample size is of course also limited by attrition due to death/decline in this population. … Cost is also a big issue/barrier to obtaining sufficient sample sizes, especially for non-pharmacological … of the interventions/exposures of interest, more studies need to be conducted with larger sample sizes … Sample size and design remain important considerations in terms of validity, but we agree that the

129. Methods Guide for Comparative Effectiveness Reviews_Inclusion of Nonrandomized Studies of Interventions in Systematic Reviews of Intervention Effectiveness: An Update (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/wysiwyg/pdf/methods-guide-inclusion-nonrandomized-studies.pdf
     September 01, 2022 - Moreover, because of their generally smaller sample size and shorter duration than NRSIs, RCTs more … Given the relatively small sample sizes and short duration of most RCTs, they are frequently underpowered … Studies that are conducted using big data offer the obvious advantage of very large sample sizes (often … Because of large sample sizes, high precision of treatment effect sizes is often attained, which may … Moreover, because of their generally large sample sizes, effect size estimates from individual NRSIs

130. Methods Guide for Comparative Effectiveness Reviews_Inclusion of Nonrandomized Studies of Interventions in Systematic Reviews of Intervention Effectiveness: An Update (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/product/pdf/methods-guide-inclusion-nonrandomized-studies.pdf
     September 01, 2022 - Moreover, because of their generally smaller sample size and shorter duration than NRSIs, RCTs more … Given the relatively small sample sizes and short duration of most RCTs, they are frequently underpowered … Studies that are conducted using big data offer the obvious advantage of very large sample sizes (often … Because of large sample sizes, high precision of treatment effect sizes is often attained, which may … Moreover, because of their generally large sample sizes, effect size estimates from individual NRSIs

131. Evidence-based Practice Center Technical Brief Protocol (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/pain-chronic_research-protocol.pdf
     July 28, 2010 - What was the study design? 2. What was the sample size? 3. … What are specific needs to make research in this area effective (e.g., design, definition of pain program … We will include studies of any sample size, any design (RCT, controlled clinical trial, uncontrolled … General study factors (design, sample size, country, funding source) Information related to Question … General Study Factors Study Design (RCT, CCT, Uncontrolled Observational, Case Report/Case

132. Version 2_Risk of Reinfection From SARS-CoV-2 -- An Update of an Antibody Response Following SARS-CoV-2 Infection and Implications for Immunity: A Living Rapid Review (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/version-2-risk-of-reinfection-from-SARSCoV2_0.pdf
     December 31, 2022 - sizes for the available studies were not large. … ~85%), but this value should be interpreted in the context of high precision resulting from large sample … sizes and low overall counts of reinfection. … sizes or a case-control design would be needed to determine whether vaccination augments protection … sizes and violations of distributional assumptions, and also has less variance than many alternative

133. Cervical Degenerative Disease Treatment (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/product/pdf/cervical-degenerative-protocol.pdf
     January 12, 2022 - of spinal cord disease);5,14,24-28 (7) high rate of industry sponsorship,12 which could influence design … , setting, country, funding, sample size, eligibility criteria, attrition, population and clinical … This may be based on sample size sufficiency and number of events. … When quantitative synthesis is not possible, sample size and assessment of variance within individual … Therefore, study questions, design, and methodological approaches do not necessarily represent the

134. First- and Second-Generation Antipsychotics in Children and Young Adults: Systematic Review Update (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/antipsychotics-children-update-disposition-170621.pdf
     March 16, 2017 - ASD (ES, Key points) (for individual SGAs): “smaller sample sizes contributing to the SOE for each … TEP 7 Methods [page 68]: Authors mention precision evaluated "on the basis of sample size and, if size … Given the typical small sample sizes within studies, imbalance between groups is likely to occur. … We divided the sample size in the control arm by 2 to account for the lower precision from this approach … We realized that 2 of the analyses did not split the sample size for one control group and we re-did

135. First- and Second-Generation Antipsychotics in Children and Young Adults: Systematic Review Update (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/antipsychotics-children-update-disposition-170621.pdf
     March 16, 2017 - ASD (ES, Key points) (for individual SGAs): “smaller sample sizes contributing to the SOE for each … TEP 7 Methods [page 68]: Authors mention precision evaluated "on the basis of sample size and, if size … Given the typical small sample sizes within studies, imbalance between groups is likely to occur. … We divided the sample size in the control arm by 2 to account for the lower precision from this approach … We realized that 2 of the analyses did not split the sample size for one control group and we re-did

136. Evidence-based Practice Center Systematic Review Protocol (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/heart-failure-natriuretic-peptide_research-protocol.pdf
     December 20, 2011 - and sample size. … sizes, settings, funding sources, comparator treatments (type, dose, duration, and provider), methodological … accuracy outcomes, and the effect size for treatment monitoring; this domain is related to study sample … size) 5) Other key domains (publication bias, dose-response association, existence of plausible … Quality Assessment Form: Cross-Sectional Design and Before-After Design Study Population Yes/No

137. Renal-Artery-Stenosis Surveillance (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/renal-artery-stenosis_surveillance.pdf
     June 01, 2012 - The sample size of the randomized trials ranged from 82 11 to 806 7. … The sample size of the observational studies ranged from 40 13 to 149 5 participants. … The findings from an RCT with smaller sample size (n=82) favored the revascularization group: Medical … [sample size =55] The survival curves were nearly identical for the two groups over 42 months. … Or 2) a trial not published in the above top 5 journals but have a sample size of at least triple the

138. PowerPoint Presentation (ppt file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/medical-test-reviews-risk-bias.ppt
     June 01, 2012 - error Adequacy of reporting Aspects of data analysis Applicability Specifying ethics approval Detailing sample … size estimates No consensus has yet been achieved on the optimal criteria for quality assessment in … adequacy of reporting, aspects of data analysis, applicability, specifying ethics approval, and detailing sample … size estimates. … (Yes/No/Unclear) Was a case-control design avoided?

139. PowerPoint Presentation (ppt file)
     effectivehealthcare.ahrq.gov/sites/default/files/medical-test-reviews-risk-bias.ppt
     June 01, 2012 - error Adequacy of reporting Aspects of data analysis Applicability Specifying ethics approval Detailing sample … size estimates No consensus has yet been achieved on the optimal criteria for quality assessment in … adequacy of reporting, aspects of data analysis, applicability, specifying ethics approval, and detailing sample … size estimates. … (Yes/No/Unclear) Was a case-control design avoided?

140. Living Systematic Review on Cannabis and Other Plant-Based Treatments for Chronic Pain: Surveillance Report 2 (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/cer-250-cannabis-apps-a-e-surveillance-report-2-final_0_0.pdf
     March 01, 2022 - size (imprecision). … size (imprecision). … sizes or numbers of studies; (2) narrowness of enrolled populations (see Tables 6 and 7); (3) lack … , year, setting, country, sample size, eligibility criteria, population and clinical characteristics … Publication bias (small sample size bias) is assessed using funnel plots when there are eight or more