Results

Total Results: 962 records

Showing results for "design sample size".

141. Emergency Medical Service/911 Workforce Infection Control and Prevention Issues (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/product/pdf/ems-911-workforce-protocol.pdf
     January 01, 2015 - the United States • Military exercises and drills • Live evacuations from another country Study design … We also will capture the sample size of studies, recognizing that some studies may fail to find a significant … difference because of a small sample size. … will independently assess the quality of each study by focusing primarily on classifying the study design

142. breast-biopsy-update-130920 (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/breast-biopsy-update_research-protocol.pdf
     September 20, 2013 - Finally, we will collect any primary research articles, regardless of design (i.e., case reports and … The basic elements and design of these forms will be similar to those we have used for other reviews … of diagnostic tests and will include elements that address population characteristics, sample size, … Studies of different designs will be graded within the context of their study design. … Design characteristics include methods of population selection and sampling and followup duration.

143. Frameworks for Determining Research Gaps During Systematic Reviews (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/methods-future-research-steps-framework_research.pdf
     June 01, 2011 - If there is only one available study, even if considered large sample size, the consistency of results … If there is only one available study, even if considered large sample size, the consistency of results … o Research Gap Number 2 − Reason for Gap – insufficient information (sample sizes in studies too small … o Description of project design – i.e., study design, PICO questions, sample size o Background and justification … If there is only one available study, even if considered large sample size, the consistency of results

144. hemorrhage-postpartum-protocol-140611 (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/hemorrhage-postpartum_research-protocol.pdf
     June 11, 2014 - We will not require a minimum sample size for comparative studies addressing Key Questions 1-4. … For estimating sample size, we used the one-tailed z-test and the t-test. … size that could yield significant results would be an N of 42. … sizes large enough to measure effects of the intervention. … sizes), the quality of evidence (from the quality ratings on individual articles), and the coherence

145. Fibromyalgia Executive (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/fibromyalgia_executive.pdf
     January 01, 2015 - Included fibromyalgia subgroup studies, by study design Study Design Count Randomized controlled trials … sizes in nonpooled analyses. … At baseline, MDD subgroup sample sizes were small in all RCTs, excluding the pooled IPD RCT analyses … Sample sizes were small. … sizes) are not shown.

146. Evidence-based Practice Center Systematic Review Protocol (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/recombinant-factor-viia_disposition-comments.pdf
     June 01, 2010 - • Inappropriate pooling of results from studies with disparity in trial design, endpoint and sample … The results from studies with disparity in sample size, heterogeneity in trial design and endpoint … The heterogeneity and disparity in sample size among the four studies further restricts pooling of data … Further, the sample sizes for the Mayer 2005a study are incorrectly reported as 495 total subjects ( … We have corrected the sample size errors regarding “495” in the text and “399” in the table.

147. FRN 29: Future Research Needs on Procalcitonin-Guided Antibiotic Therapy (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/procalcitonin-future_research.pdf
     August 01, 2014 - Recruitment of unit “clusters” willing to be randomized may constrain sample size. … Generally less resource intensive than an experimental design, but sample size will depend on desired … However, the magnitude of the noninferiority margin is inversely proportional to sample size, which … Recruitment of unit “clusters” willing to be randomized may constrain sample size. … Generally less resource intensive than an experimental design, but sample size will depend on desired

148. Future Research Needs for Angiotensin-Converting Enzyme Inhibitors (ACEIs), Angiotensin II Receptor Antagonists (ARBs), or Direct Renin Inhibitors (DRIs) for Treating Hypertension (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/ace-inhibitor-arb-future_research.pdf
     March 01, 2012 - sizes, and only one study included evaluation of a DRI. 4 Table 1. … sizes for ARBs, the precise magnitude of this effect is difficult to quantify. … Considerations include: • Sample size required for a particular outcome and to include a representative … size to achieve adequate power … size

149. Making Healthcare Safer IV_Rapid Review: Use of Structured Handoff Protocols for Intrahospital Within-Unit Transitions (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/structured-handoff-rapid-research.pdf
     January 01, 2025 - Handoff From Whom to Whom Setting/C ontext Sample Size Clinical Outcomes Starmer 201337 … Handoff From Whom to Whom Setting/C ontext Sample Size Clinical Outcomes Khan 201833 … Handoff From Whom to Whom Setting/C ontext Sample Size Clinical Outcomes Ting 201742 … Was the sample size sufficiently large to provide confidence in the findings? … Was the sample size sufficiently large to provide confidence in the findings?

150. Disposition of Comments Report for CER 207 on PTSD (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/cer-207-ptsd-disposition-comments.pdf
     May 17, 2018 - It is very common for a statistician to hear a researcher excuse poor design/analysis decisions saying … The paper also states: “Large variation in study design, conduct, population, measurements, and analyses … A "statistically significant" result, p<.05, merely means that the sample size was large enough to … No matter how small the deviation, there is always a sample size large enough to give 80% power of … We include this information in the study characteristic tables about sample sizes for each arm of each

151. Traumatic-Brain-Injury-Rehabilitation Executive (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/traumatic-brain-injury-rehabilitation_executive.pdf
     June 01, 2012 - Sample sizes for the eight studies ranged from 36 to 366. … sizes. … For example, the data collected about patients, injuries, and interventions from larger sample sizes … Studies with much larger sample sizes, enhanced applicability, and rich data to answer the question … First, related to larger sample sizes, studies must be appropriately powered to detect differences between

152. Work Plan for Methods Research on (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/study-design-classification_research.pdf
     December 01, 2010 - Implications for Practice The appropriate classification of studies by design or by design features … Further, studies may use one particular design for some outcomes and a different design for other outcomes … The reliance on study design labels, and the inappropriate or inaccurate use of study design labels … Sample size and optimal study desings for reliability studies. Stat Med 1998;17:101-110. 36. … Sample size requirements for reliability studies. Stat Med 1987;6:441-448. 37.

153. Layout 1 (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/rotator-cuff-tear_executive.pdf
     July 01, 2010 - Comparative studies were considered appropriate to combine in a meta-analysis if the study design, study … Common weaknesses in the design of the studies included lack of independent blind outcome assessment … postoperative scores, regardless of the type of approach used (open, mini-open, or arthroscopic), the study design … , the sample size of the study, or the type of outcome measure used. … Five studies compared nonoperative to operative treatments, with a median sample size of 103 (IQR: 40

154. Prostate-Cancer-Test Research-Protocol (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/prostate-cancer-test_research-protocol.pdf
     October 14, 2011 - followup 10 Source: www.effectivehealthcare.ahrq.gov Published Online: October 14, 2011 Sample … size No studies of PCA3 will be excluded based on sample size but this element will be considered as … No primary matched studies will be excluded based on sample size, but this will be considered part of …  Was there an attempt to balance groups by design? … Was the scientific quality (e.g., sample size, study design, blinding, biases, and confounders) of the

155. Omega-3 Fatty Acids and Cardiovascular Disease: An Updated Systematic Review (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/fatty-acids-cardiovascular-disease_disposition-comments.pdf
     August 12, 2016 - Some of the exclusions of studies on the basis of sample size seem arbitrary: for example, studies of … We have added a small section, under Minimum Sample Sizes, to explain our rationale and to state … In contrast, the minimum sample sizes for RCTs with lipid and BP outcomes may direct your results in … The sample size was too small (N<30) in each arm at 1 year followup. … All those that were not included had already been rejected (mostly based on sample size, too-short

156. Covariate Selection for Observational Comparative Effectiveness Research
     effectivehealthcare.ahrq.gov/sites/default/files/considerations-for-statistical-chapter-10.pptx
     January 01, 2013 - options that can be considered, which depend on the study question and the particulars of the study design … Complete-case analysis for subjects with no missing data: Can reduce sample size, limiting efficiency … However, an initial limitation with this approach is that sample size is reduced, which affects efficiency … model that will be used for primary and secondary analytical objectives Should take into account the design

157. S158 (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/s158.pdf
     October 01, 2007 - Research Design: Review types of validation studies that allow adjustment for unmeasured confounding … †Internal validation studies contain information on disease outcome of interest by design. … Logistic regression analysis and efficient design for two-stage studies. … Two-stage case-control studies: precision of parameter estimates and considerations in selecting sample … size.

158. S44 (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/s44.pdf
     October 01, 2007 - He suggested a randomized delay, and Chalmers agreed to speak in favor of that design. … We explain that randomization is good method of design, but it is not essential. … delays in the controls; just one of DD trials had to collect data by survey of patients Outcomes, sample … size and stopping rules, participant flow, recruitment, baseline data Researcher Grant proposals with … This aspect of policy design, how- ever, was not in our purview.

159. Radiation Therapy for Bone Metastases (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/product/pdf/rt-bone-metatases-final-protocol-amendment.pdf
     August 10, 2022 - , year, setting, country, funding, sample size, eligibility criteria, attrition, radiation therapy delivery … 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 … to 20 patients Increasing the sample size was felt to improve representativeness of included … Therefore, study questions, design, and methodological approaches do not necessarily represent the

160. Multidisciplinary Rehabilitation Programs for Moderate to Severe Traumatic Brain Injury in Adults: Future Research Needs (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/traumatic-brain-injury-rehabilitation-future_research.pdf
     January 01, 2013 - example, factors that affect the feasibility of conducting randomized controlled trials include the sample … size needed for the outcome, the size of the available pool of potential subjects, followup duration … Research Design Considerations We generated research design considerations for identified research needs … Similar to RCT Sample size will need to be larger than experimental designs given heterogeneity … Sample size will need to be larger than randomized designs given heterogeneity of population and