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Showing results for "sample".

221. Covariate Selection for Observational Comparative Effectiveness Research
     effectivehealthcare.ahrq.gov/sites/default/files/considerations-for-statistical-chapter-10.pptx
     January 01, 2013 - Univariate or unadjusted hypothesis testing, such as two-sample t-tests, can be conducted to identify … Unadjusted Analysis Univariate or unadjusted hypothesis testing, such as two-sample t-tests, can be conducted … 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

222. Comparative Effectiveness of Fecal DNA Testing in Screening for Colorectal Cancer in Average Risk Adults. (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/colorectal-cancer-screening_disposition-comments.pdf
     February 01, 2012 - In only one FIT is the sample collected with a brush. … Page 21 - See my changes - About 50 percent more patients (641 vs. 426) did not provide an adequate sample … included patients who simply did not perform the test rather than those who submitted an inadequate sample … “Ability present in the sample of assay to measure the target substance when potentially interfering … or cross-reacting substances are present in the sample” We have edited the grammatical error.

223. Slide 1
     effectivehealthcare.ahrq.gov/sites/default/files/sensitivity-analysis-chapter-11.pptx
     January 01, 2013 - These patients should be considered separately where sample size considerations allow. … PMID:19437424. http://www.ncbi.nlm.nih.gov/pubmed/19437424 Sample Graphical Presentation (1 of 2) … Sample Graphical Presentation (1 of 2) This example from Robyn McClelland and colleagues (2008) is a … Sample Graphical Presentation (2 of 2) Plot to assess the strength of unmeasured confounding necessary … between drug use category and confounder; RRCD = association between confounder and disease outcome Sample

224. Data Development for Patient Safety — A Pilot Study using Medicare Part B Drug Data | Effective Health Care (EHC) Program
     effectivehealthcare.ahrq.gov/products/patient-safety-drug-data/abstract
     January 01, 2005 - Data Development for Patient Safety — A Pilot Study using Medicare Part B Drug Data Abstract January 1, 2005 Topic Abstract Medicare administrative claims data offer a valuable informational source for the surveillance of adverse drug events, but there are substantial challenges in exploiting these d…

225. Evidence-based Practice Center Systematic Review Protocol (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/colorectal-cancer-screening_research-protocol.pdf
     May 18, 2011 - In addition, proponents point out that fecal DNA testing requires only a single whole- stool sample … Sample Size KQs 1–6: We will not exclude studies based on sample size alone, although it may be considered … source of study funding, study design characteristics, recruitment setting/patient-inclusion criteria, sample … expression analyzed, the assay characteristics and laboratory setting, and the technique used for sample

226. PHS 398 (Rev. 9/04), Continuation Page (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/administrative-data-validity_research.pdf
     January 01, 2007 - study using claims data, with few exceptions, investigators should obtain medical records in at least a sample … Investigators then selected a random sample of events and forwarded to CSC to initiate the retrieval … While the sample was sufficiently small (N=7), the PPV is at least 65% and consistent up through and

227. PHS 398 (Rev. 9/04), Continuation Page (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/upenn-final-report-2005-certs-ce-supplement.pdf
     January 01, 2005 - study using claims data, with few exceptions, investigators should obtain medical records in at least a sample … Investigators then selected a random sample of events and forwarded to CSC to initiate the retrieval … While the sample was sufficiently small (N=7), the PPV is at least 65% and consistent up through and

228. Interventions for Substance Use Disorders in Adolescents: A Systematic Review | Effective Health Care (EHC) Program
     effectivehealthcare.ahrq.gov/products/substance-use-disorders-adolescents/protocol
     October 29, 2018 - Population (all KQs) Age: Adolescents (12–20 years inclusive) Exclude if > 20 percent of study sample … using an Evidence Map structure in which we will gather basic data on each article (e.g., study design, sample … of the interventions and comparators; outcome definitions; effect modifiers; enrolled and analyzed sample … Tables will include descriptions of the study design, sample size, intervention(s), followup duration … evidence per GRADE. 29 Based on further evaluation of the evidence base, we may lower the minimum sample

229. Choice-Of-Mean White-Paper (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/choice-of-mean_white-paper.pdf
     April 01, 2015 - Group #2) Number of Studies (N) Group #1 and Group #2 Total Sample Size (Min-Max) Baseline … Group #2) Number of Studies (N) Group #1 and Group #2 Total Sample Size (Min-Max) Baseline … Group #2) Number of Studies (N) Group #1 and Group #2 Total Sample Size (Min-Max) Baseline … Group #2) Number of Studies (N) Group #1 and Group #2 Total Sample Size (Min-Max) Baseline … Group #2) Number of Studies (N) Group #1 and Group #2 Total Sample Size (Min-Max) Baseline

230. Effectiveness of Early Diagnosis, Prevention, and Treatment of Clostridium difficile Infection (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/c-diff-infections_disposition-comments.pdf
     March 01, 2012 - In my own experience when a laboratory moves from testing any sample to only testing loose stools the … “Sample characteristics” should be “patient and stool sample characteristics.” … The descriptions of the sample, groups, and parts of the methods are not identical because there is … We reworded the sample description to clarify that all subjects had recurrent CDI. … The sample consisted of subjects who had recurrent CDI.

231. Layout 1 (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/c-diff-infections_executive.pdf
     December 01, 2011 - (a) Do the differences in performance measures vary with sample characteristics? KQ 2. … the differences in sensitivity and specificity in stool samples tested within the same lab using the sample … nonstandard intervention for treatment or prevention of CDI be supported by a power analysis, adequate sample … Multicenter studies may be necessary to achieve adequate sample sizes. … How do • Few comparisons are • Comparison of diagnostic • Document stool sample different methods for

232. Evidence-based Practice Center Systematic Review Protocol (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/antiplatelet-treatment_research-protocol.pdf
     November 22, 2011 - The precision of estimates of analytic validity depends on the specific statistic used; generally, a sample … interest were used o Case–control studies o N>10 subjects (per arm, if there are ≥2 arms); smaller sample … trials o Nonrandomized comparative studies o N>10 subjects (per arm, if there are ≥2 arms); smaller sample … because our preliminary searches indicate that non–English- language studies are few and have small sample … those we have used for other CERs and will include elements that address population characteristics, sample

233. 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 - I would like to briefly comment on the discussion of detection bias (lack of blinding) and small sample … PwD) manifests itself with such large inter-person or intra person variability that a really large sample … Sample size is of course also limited by attrition due to death/decline in this population. … 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

234. Er r or Rate Reduction Regarding Lower Limb Prosthesis (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/prosthesis_research-protocol.pdf
     March 16, 2017 - • Any study design • No minimum sample size (except not case reports) • No minimum followup time … adverse effects) Study Design • Any study design, including qualitative studies • No minimum sample … of accessing a LLP Study Design • Any study design, including qualitative studies • No minimum sample … exposures, and comparators analyzed; outcome definitions; effect modifiers; enrolled and analyzed sample … These included descriptions of the study design, sample size, interventions, followup duration, outcomes

235. Research White Paper Patient- or Participant-Generated Registries Addendum Registries for Evaluating Patient Outcomes Third Edition (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/pdf/patient-participant-generated-registries-guide-3rd-ed-addendum-white-paper.pdf
     February 01, 2018 - the Agency for Healthcare Research and Quality (AHRQ).7 While the survey represented a very small sample … About half of the registries in the sample are managed by advocacy organizations, with the others managed … While the sample from the PGR was subject to limitations and biases, the analysis provided rapid proof … T-Test to look at differences in progression rate between self-treating participants and a random sample … Other PGRs may validate the diagnosis for a sample of participants using medical record review or contact

236. Research White Paper Patient- or Participant-Generated Registries Addendum Registries for Evaluating Patient Outcomes Third Edition (pdf file)
     effectivehealthcare.ahrq.gov/sites/default/files/wysiwyg/patient-participant-generated-registries-guide-3rd-ed-addendum-white-paper.pdf
     February 01, 2018 - the Agency for Healthcare Research and Quality (AHRQ).7 While the survey represented a very small sample … About half of the registries in the sample are managed by advocacy organizations, with the others managed … While the sample from the PGR was subject to limitations and biases, the analysis provided rapid proof … T-Test to look at differences in progression rate between self-treating participants and a random sample … Other PGRs may validate the diagnosis for a sample of participants using medical record review or contact

237. Cer-238-Cervical-Ripening-Appendix-G (xls file)
     effectivehealthcare.ahrq.gov/sites/default/files/cer-238-cervical-ripening-appendix-g.xlsx
     December 18, 2020 - assessments for comparative cohort studies Study Did the study attempt to enroll all (or a random sample

238. Cannabis-2023-Surv-Rep-1-App-G (xls file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/cannabis-2023-surv-rep-1-app-G.xlsx
     January 01, 2023 - Risk of bias of cannabis cohort studies Author, Year Did the Study Attempt To Enroll All (or a Random Sample

239. Cannabis-2022-Surv-Rep-4-Tables-G1-2 (xls file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/cannabis-2022-surv-rep-4-tables-G1-2.xlsx
     January 01, 2022 - Risk of bias of cannabis cohort studies Author, Year Did the Study Attempt To Enroll All (or a Random Sample

240. Cannabis-2023-Surv-Rep-4-Tables-F1-F-2 (xls file)
     effectivehealthcare.ahrq.gov/sites/default/files/related_files/cannabis-2023-surv-rep-4-tables-F1-F-2.xlsx
     January 01, 2023 - Risk of bias of cannabis cohort studies Author, Year Did the Study Attempt To Enroll All (or a Random Sample