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Showing results for "design sample size".

41. Template for Draft Reports (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/osteoarthritis-knee-future_research.pdf
    February 01, 2013 - An RCT will be resource intensive, requiring a large sample size because the marginal difference between … Large sample sizes and the identification, measurement, and appropriate adjustment for confounding … Large sample sizes and the identification, measurement, and appropriate adjustment for confounding … Advantages for producing a valid result Results will be most valid with a large sample size and the … The trial has a planned sample size of 300. 19 Discussion This FRN project refined

42. 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 - Overall the report demonstrated the large gaps in knowledge, the small sample sizes, the lack of replication … sizes. … Getting larger sample sizes in this area would be difficult because larger samples are quite costly … The only anecdote for small sample sizes is a collection of smaller studies that reach similar conclusions … Sample size should have been given much greater weight in determination of strength of evidence.

43. CER 217 Management of Infertility Evidence Summary (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/related_files/cer-217-infertility-evidence-summary.pdf
    May 01, 2019 - (Sample Size) Conclusion Strength of Evidence (Rationale)a Lifestyle modifications + IVF vs. … (Sample Size) Conclusion Strength of Evidence (Rationale)a ART vs. no infertility treatment … (Sample Size) Conclusion Strength of Evidence (Rationale)a ART: IVF/ICSI vs. … (Sample Size) Conclusion Strength of Evidence (Rationale)a Oral Agents With IUI vs. … and Sample Size Conclusion Strength of Evidence (Rationale)a IVF vs.

44. Living Systematic Review on Cannabis and Other Plant-Based Treatments for Chronic Pain: 2023 Update -- Surveillance Report 4 (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/related_files/cannabis-2023-surv-rep-4.pdf
    January 01, 2023 - The new study was assessed as high risk of bias and had a small sample size (n=60). … studies identified since the 2023 systematic review Search Period Citation Risk of Bias N Study Design … 2023a) 23 Randomized controlled trial 3 Search Period Citation Risk of Bias N Study Design

45. Evidence-based Practice Center Systematic Review Protocol (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/therapies-for-autism-spectrum-disorder-2-9-2010.pdf
    January 01, 2010 - sizes, limited follow-up, and limited discussion of the durability of treatment gains once active therapy … sizes must be appropriate for the study question addressed in the paper; single case reports or small … After reviewing a sample of relevant articles, the Methods and Content Leads will design the data collection … size, and study type (e.g., randomized controlled trial, prospective observational study, etc). … Therefore study questions, design and/or methodological http://www.effectivehealthcare.ahrq.gov/�

46. Evidence-based Practice Center Systematic Review Protocol (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/autism_research-protocol.pdf
    December 09, 2009 - sizes, limited follow-up, and limited discussion of the durability of treatment gains once active therapy … sizes must be appropriate for the study question addressed in the paper; single case reports or small … After reviewing a sample of relevant articles, the Methods and Content Leads will design the data collection … size, and study type (e.g., randomized controlled trial, prospective observational study, etc). … Therefore study questions, design and/or methodological http://www.effectivehealthcare.ahrq.gov/�

47. C- Evidence-based Practice Center Technical Brief Protocol (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/musculoskeletal-disorders-imaging_research-protocol.pdf
    August 05, 2010 - , of studies with a specific characteristic), or medians and interquartile range (e.g., for study sample … sizes), as applicable.11 Qualitative synthesis of information will be facilitated by the use of tables … Alternative graphs depicting study designs, medical conditions where positional MRI is utilized, sample … sizes enrolled, and the specific outcomes investigated, will be generated. … or longitudinal; single center or multicenter) and study sample size.

48. Liver-Cancer Research-Protocol (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/liver-cancer_research-protocol.pdf
    July 24, 2013 - Sample Size Studies with very small numbers of participants (n < 20) will not be included. … , setting, country, sample size, eligibility criteria, population and clinical characteristics, intervention … We will also estimate publication bias by examining whether studies with smaller sample sizes tended … size of the studies • Settings in which the studies are performed (e.g., use of different reference … size to be determined after full text review.

49. AHRQ Evidence-Based Practice Center (EPC) Program Research Gaps Summary: Pain Management (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/related_files/gaps-pain-management.pdf
    January 01, 2023 - • Study design. … sizes can help address evidence gaps. … size to evaluate the differential impact of conditions and factors. … Study Design • Trials with sufficient sample size designed to evaluate differential effectiveness … size limitations.

50. Tinnitus Executive (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/related_files/tinnitus_executive.pdf
    August 01, 2013 - sizes (n<60). … Small sample sizes led to these studies being considered imprecise. … Sample sizes tended to be small (<100 persons), and power calculations were largely absent from the … treatment groups, justify minimum clinically important differences, and justify sample sizes … • Enroll sample sizes large enough to evaluate confounders.

51. Evidence Report on the (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/antidepressants-update_research-protocol.pdf
    July 13, 2011 - size For quantitative analysis: no limit For qualitative analysis: n ≥ 40 Key Question 2a: … size For RCTs: no limit For observational studies: n ≥ 100 Key Question 2b: Response and … size For RCTs: For quantitative analysis: no limit For qualitative analysis: n ≥ 40 For … size For RCTs: For quantitative analysis: no limit For qualitative analysis: n ≥ 40 For … , study design, methods, and results.

52. Defining an Optimal Format for Presenting Research Needs (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/methods-future-presentation-format_research.pdf
    January 01, 2019 - size. … size that would inform all parameters in the decision model. … sizes with the largest trials in the field, as a yardstick for research feasibility or cost. … Econ 16981193 Expected value of information and decision making in HTA 2007 Health Econ 17327242 Sample-size … dynamics of aging information 2010 Phys Rev Lett 20378190 Simulation sample sizes for Monte Carlo

53. Evidence Summary_Comparative Effectiveness Review No. 247_Interventional Treatments for Acute and Chronic Pain: Systematic Review (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/related_files/cer-247-interventional-treatments-acute-chronic-pain-evidence-summary_0.pdf
    September 01, 2021 - a potential marker for publication bias) due to small numbers of trials and heterogeneity in study design … shortcomings (e.g., high attrition, lack of intent-to-treat analysis, baseline group differences, small sample … sizes, inadequate or unclear randomization or allocation concealment methods, open-label design, and

54. Evidence-based Practice Center Systematic Review Protocol (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/antiplatelet-treatment_research-protocol.pdf
    November 22, 2011 - size of 50 excludes studies that are too small to be informative without being otherwise restrictive … sizes are unlikely to provide estimates of predictive effects that are adequately precise o Studies … sizes are unlikely to estimate comparative effectiveness with adequate precision o Studies that … sizes; as such, they are unlikely to affect our conclusions. … and will include elements that address population characteristics, sample size, study design, descriptions

55. GRADING THE STRENGTH OF A BODY OF EVIDENCE (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/methods-guidance-grading-evidence_methods.pdf
    November 01, 2013 - It is based on the potential for random error evaluated through the sufficiency of sample size and, … EPCs can evaluate sufficiency of sample size relative to the optimal information size (OIS). … After assessing the adequacy of the sample size or events, EPCs must consider whether the potential … of studies and total sample size across studies assessed at risk of reporting bias and the total … number and sample size across studies considered free of reporting bias.

56. Transparency of Reporting Requirements: Omega-3 Fatty Acids and Cardiovascular Disease (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/transparency-omega-3_research-protocol.pdf
    September 02, 2016 - This spreadsheet will capture basic intervention, outcome, study design, sample size, and whether results … size (for all outcomes). … ) but would not have been included in the original report (primarily due to small sample size) and … , intervention type and duration, population, outcomes, and sample size. … We quantify such impact as a potential increase in total study population sample size (>20%), a change

57. Evidence-based Practice Center Systematic Review Protocol (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/autism-adolescents_research-protocol.pdf
    March 29, 2011 - A cutoff sample size of 20 provides a balance, allowing us to review and comment on adequate literature … In particular, the TEP noted that a sample size of 20 for studies of all types of interventions (e.g … ., medical, behavioral, etc.) takes into account the typically smaller sample sizes in the ASD literature … size, and study type (e.g., randomized controlled trial, prospective observational study, etc.). … sizes), the quality of evidence (from the quality ratings on individual articles), and the coherence

58. Evidence-based Practice Center Systematic Review Protocol (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/depression-brain-injury_research-protocol.pdf
    December 09, 2009 - publication, study location (e.g., country, city, state) and time period, population description, sample … size, and study type (e.g., randomized controlled trial, prospective observational study, etc). … 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 … Therefore study questions, design and/or methodological approaches do not necessarily represent the

59. Transparency of Reporting Requirements: Effectiveness of Treatments Options for the Prevention of Complications and Treatment of Symptoms of Diabetic Peripheral Neuropathy (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/pdf/transparency-neuropathy_research-protocol.pdf
    September 01, 2016 - To estimate the number completed, we then added criteria to limit by study design, status and crudely … Preliminary data extraction elements: Trial design Design (randomized?) … Reasons for delays (if any) Population Total enrollment, sample size in each arm, drop-outs Participants … • Comparison of prespecified statistical plan • Sample sizes, total and per arm.

60. Disposition of Comments Report for Evidence Report/Technology Assessment No. 214 (pdf file)
    effectivehealthcare.ahrq.gov/sites/default/files/related_files/smoking-pregnancy-infants_disposition-comments.pdf
    February 25, 2014 - = 0.30) the sample size per E + C Group. … The justification for this unacceptable sample size criteria in the Report makes no sense. … (See CDC Epi-Info/Estimation of sample sizes + Fleiss). … Although it is commonly used, a minimum sample size of 50 has no intrinsic value as a cutoff. … The 29 “Good + Fair” studies, excluding the deleted evaluations with small sample sizes, would be the