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Total Results: 969 records

Showing results for "design sample size".

281. Dementia-Agitation-Aggression Executive (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/dementia-agitation-aggression_executive.pdf
     March 01, 2016 - This was mainly because of heterogeneous comparisons and small sample sizes. … Calculation of sample sizes necessary for appropriately powered RCTs should incorporate the high attrition … Sample size calculations should also take into consideration that individuals with dementia may change … Withdrawals and dropouts created considerable loss of participants from already small sample sizes in … sizes.

282. Association Between Outcomes and Dental Services in People at Risk of Post-Transplant Complications: A Rapid Response Review (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/dental-post-transplant-complications-rapid-research.pdf
     May 01, 2025 - : study design, study population eligibility criteria, sample size, follow-up duration, setting • … Funding Risk of Bias Study Design Sample Size (Treatment/Control) Study Inclusion Criteria … Sample Size (Treatment/Contr ol) Treatment Comparison Outcomes Assessed Results in the … We rated this study as being of fair quality due to its retrospective design and small sample size. … , had a small sample size.

283. Evidence Report on the (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/vte-protocol-8-4-10.pdf
     February 01, 2008 - Observational studies will be limited to those with a larger sample size given that most contemporary … Observational studies will be assessed for sample size, participant selection method, exposure measurement … This can be assessed through the evaluation of both design and study limitations. … Source: www.effectivehealthcare.ahrq.gov Published Online: August 06, 2010 had an adequate sample … size, and used intention to treat analysis.12 Studies meeting less than 5 criteria would be classified

284. Evidence Report on the (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/blood-clots-hip-knee-surgery_research-protocol.pdf
     February 01, 2008 - Observational studies will be limited to those with a larger sample size given that most contemporary … Observational studies will be assessed for sample size, participant selection method, exposure measurement … This can be assessed through the evaluation of both design and study limitations. … Source: www.effectivehealthcare.ahrq.gov Published Online: August 06, 2010 had an adequate sample … size, and used intention to treat analysis.12 Studies meeting less than 5 criteria would be classified

285. Treatment Strategies for Women With Coronary Artery Disease: Future Research Needs (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/cad-women-treatment-future_research.pdf
     February 01, 2013 - of large enough sample size with stratification of randomization by sex to allow for meaningful sex-based … of large enough sample size with stratification of randomization by sex to allow for meaningful sex-based … Considerations include: • Sample size required for a particular outcome and to include a representative … size to achieve adequate power … size

286. Assessing-The-Risk-Of-Bias-In-Systematic-Reviews-Of-Health-Care-Interventions (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/assessing-the-risk-of-bias-in-systematic-reviews-of-health-care-interventions-01_0.pdf
     May 01, 2005 - Study Design. … uncertainty surrounding an effect estimate with respect to a given outcome, based on the sufficiency of sample … size and number of events.24 Both GRADE33 and AHRQ guidance on evaluating the strength of evidence24 … However, instead of equating risk of bias solely with study design, the bias represented by study design … Does design matter?

287. CERs Report cover (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/hip-feature-treatment-future_research.pdf
     September 23, 2010 - Likely multicenter studies will be necessary to attain adequately powered sample sizes. … The sample size was limited by the Paperwork Reduction Act and Information Collections Policy (44 USC … Instead, we sought to minimize the burden by using a small sample size and informal discussions via … Sample size est. was 220; 300 envelopes were generated but only 210 enrolled: groups were unbalanced … Linkage with other ongoing efforts (e.g., PROMIS) Design Issues 6.

288. Untitled (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/thromboembolism-update_research-protocol.pdf
     February 17, 2016 - The basic elements and design of the extraction form will be the similar to those used for other AHRQ … exposures, and comparators analyzed; outcome definitions; effect modifiers; enrolled and analyzed sample … sizes; study design features; funding source; results; and risk of bias questions.   … These included descriptions of the study design, sample size, interventions, followup duration, outcomes … Therefore study questions, design, and methodological approaches do not necessarily represent the views

289. Assessing-The-Risk-Of-Bias-In-Systematic-Reviews-Of-Health-Care-Interventions (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/product/pdf/assessing-the-risk-of-bias-in-systematic-reviews-of-health-care-interventions-01.pdf
     May 01, 2005 - Study Design. … uncertainty surrounding an effect estimate with respect to a given outcome, based on the sufficiency of sample … size and number of events.24 Both GRADE33 and AHRQ guidance on evaluating the strength of evidence24 … However, instead of equating risk of bias solely with study design, the bias represented by study design … Does design matter?

290. Disposition of Comments: Comparative Effectiveness Review No. 232_Interventions for Breathlessness in Patients With Advanced Cancer (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/cer-232-breathlessness-cancer-comments.pdf
     November 19, 2020 - size etc). … Given the 3 studies with substantial sample size, and our prespecified criteria, we have kept the conclusion … The number of studies were already very limited, the sample sizes were small, not all reported these … outcomes, and the study design varied a lot. … often used a blinded placebo design.

291. An analytical framework for quantifying components of variability in prescriber decisions (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/instrumental-variable-methods_research.pdf
     April 01, 2010 - Reporting p- values is probably not helpful as they are more a reflection of sample size than covariate … and the predicted value of treatment. 10 The bias is toward the OLS estimate and decreases with sample … size but increases with the number of instruments included in the first-stage model.

292. Colon-Cancer-Gene-Profiling Research-Protocol (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/colon-cancer-gene-profiling_research-protocol.pdf
     March 13, 2012 - The FDA addresses the safety and effectiveness of diagnostic tests and the quality of the design and … (prospective vs. retrospective; cohort vs. convenience sample; derivation, validation, or both), sample … size, and study goal (analytic validity, clinical validity, and/or clinical utility) • Comparator …  Sample size (number of patients/specimens) o If samples are from previous studies, which studies? … • What was the study design?

293. Antiplatelet-Treatment Executive (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/antiplatelet-treatment_executive.pdf
     September 01, 2013 - size, study design, analytic details, and outcomes. … We considered evidence to be sparse if it was from only one study with a small sample size. … The 106 studies had intermediate to large sample sizes: median number of enrolled individuals = 277, … The sample sizes ranged from 21 to more than 2,000 participants, and all 14 studies were relatively … The remaining 12 studies had smaller sample sizes, ranging from 21 to 159 patients, and also had short

294. Psychological and Pharmacological Treatments for Adults with Posttraumatic (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/ptsd-adult-treatment-update_research-protocol.pdf
     December 31, 2017 - KQs 1–3: Randomized controlled trials (RCTs) of any sample size, systematic reviews (for references … nonrandomized controlled trials, prospective cohort studies with an eligible comparison group and a sample … size of at least 500,a case-control studies with a sample size of at least 500a All other designs … and studies using included designs that do not meet the sample size criterion Language Studies … For KQ 4, we have chosen a sample size cutoff of 500 for prospective cohort studies and case-control

295. Evidence-based Practice Center Systematic Review Protocol (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/rotator-cuff-tear_disposition-comments.pdf
     October 05, 2010 - that the lack of statistically significant difference between the groups is attributable to the small sample … size; this study was aborted early since it appeared that augmentation would not improve the rates … We hope that authors will find the recommendations for future research helpful in guiding the design … Discussion [The section on future research provides sound advice on general principles of study design … In particular, and appendix would be helpful within which the design of one or more ideal studies are

296. Research to Improve the Delivery of Clinical Preventive Services to People with Disabilities (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/wysiwyg/stakeholder-report_0824.pdf
     August 01, 2024 - The intervention studies, some of which were characterized by small sample sizes, focused on educational … benefits of exploring data harmonization to enable the analysis of data from multiple studies with small sample … sizes; and • The need for more qualitative data integrated into research studies, including oral … More broadly, a focus on universal design—in which products, services, and environments are designed … Curb cuts are one well-known example of universal design.

297. Data Points 13: Use of Preoperative Breast MRI among older women with ductal carcinoma in situ and locally invasive breast cancer (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/dcis-mri-utilization_research.pdf
     August 01, 2012 - We present results for the comedo subtype where there is adequate sample size. … Leonard for their graphic design expertise.

298. advanced-care-decision-aids-protocol-131209 (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/advanced-care-decision-aids_research-protocol.pdf
     December 09, 2013 - We will include studies published in English of any sample size and any design (randomized controlled … Studies that examined decision aids in different populations (possibly by study design) Decision Clinical … Exclusion Sample Comparator Harms (ethical/ Aid/Use population/ criteria- criteria size/Study emotional design

299. Evidence-based Practice Center Systematic Review Protocol (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/ptsd-adult-treatment_research-protocol.pdf
     December 20, 2011 - In addition, we will include nonrandomized controlled trials of any sample size, prospective cohort … studies with an eligible comparison group with a sample size of at least 500, and case-control studies … with a sample size of at least 500. … We will not include observational studies with a sample size of less than 500 or for other KQs due … For KQ 6, we have chosen a sample size cutoff Source: www.effectivehealthcare.ahrq.gov Published

300. The Effectiveness and Risks of Long-Term Opioid Treatment of Chronic Pain (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/chronic-pain-opioid-treatment_executive.pdf
     September 19, 2014 - size, duration of followup, attrition, intervention characteristics (including specific opioid and … risk prediction instruments, we attempted to create two-by-two tables from information provided (sample … size, prevalence, sensitivity, and specificity) and compared calculated measures of diagnostic accuracy … risks (RR) and associated 95 percent confidence intervals (CI) based on the information provided (sample … sizes and 6 incidence of outcomes of interest in each intervention group).