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  1. effectivehealthcare.ahrq.gov/sites/default/files/pdf/methods-guide-editorial_methods.pdf
    July 01, 2012 - EPCs conduct reviews for use by a variety of groups, including national guideline groups such as the … Reviews; hereinafter called the General Methods Guide).8 This guidance, along with those of other groups
  2. effectivehealthcare.ahrq.gov/sites/default/files/pdf/disruptive-behavior-disorder_clinician.pdf
    August 01, 2016 - disruptive behaviors 11 (8 RCTs; 3 cohorts) 1329 ��Consistently improved in the intervention groups … Parent-rated child disruptive behaviors 13 (12 RCTs; 1 cohort) 1486 �� Improved in the intervention groups … , quetiapine) Disruptive behaviors 3 (3 RCTs) 374 ��Significantly improved in the intervention groups
  3. effectivehealthcare.ahrq.gov/sites/default/files/product/pdf/methods-guide-inclusion-nonrandomized-studies.pdf
    September 01, 2022 - The randomization of study participants to treatment and comparator groups, when allocation is concealed … When properly executed, the randomization process helps ensure that the study groups are comparable … Cross-sectional studies are non-experimental and may allow the comparison of groups of participants … Confounding NRSIs may be subject to a high risk of confounding if the treatment and comparator groups … The second difference (between-group) controls for time-varying factors that are common across groups
  4. effectivehealthcare.ahrq.gov/sites/default/files/wysiwyg/pdf/methods-guide-inclusion-nonrandomized-studies.pdf
    September 01, 2022 - The randomization of study participants to treatment and comparator groups, when allocation is concealed … When properly executed, the randomization process helps ensure that the study groups are comparable … Cross-sectional studies are non-experimental and may allow the comparison of groups of participants … Confounding NRSIs may be subject to a high risk of confounding if the treatment and comparator groups … The second difference (between-group) controls for time-varying factors that are common across groups
  5. effectivehealthcare.ahrq.gov/sites/default/files/pdf/dcis-prognostic-tests_research.pdf
    August 22, 2012 - rates of this testing increased between 2004 and 2007 in both DCIS and early invasive breast cancer groups … Rates of testing varied significantly across race groups for all tests. … Among women with DCIS, black women were less likely to have ER/PR testing than other racial groups … The percentage of women with ER+ tumors was similar for the DCIS and invasive cancer groups. … Second, the esti- mated rates of testing for both groups will be biased downward, because our cohort
  6. effectivehealthcare.ahrq.gov/sites/default/files/pdf/long-term-care-adults-future_research.pdf
    July 01, 2013 - We engaged consumer and provider groups, including AARP and the National Center for Assisted Living … , because the decisional dilemmas faced by these groups are critical to identifying and prioritizing … A total of 13 stakeholders across these groups responded to our invitation and expressed an interest … We engaged consumer and provider groups, including AARP and the National Center for Assisted Living … Participating stakeholders included representatives from all groups that we engaged in the process.
  7. effectivehealthcare.ahrq.gov/sites/default/files/pdf/asthma-education-protocol.pdf
    January 01, 2018 - o Interviews, focus groups, other qualitative or quantitative evaluation techniques • What new types … Should other groups of professionals play a greater or different role in delivering AS-ME? … descriptions and evaluations of AS-ME packages implemented by individual hospitals, health systems, provider groups … We will not require that studies have control groups. … Daines L, Pearce G, Epiphaniou E, Bower P, Sheikh A, Griffiths CJ, Taylor SJ, PRISMS and RECURSIVE groups
  8. effectivehealthcare.ahrq.gov/sites/default/files/related_files/cer-218-osteoporosis-fracture-prevention-evidence-summary.pdf
    April 01, 2019 - have led to the suggestion that bisphosphonate treatment be discontinued periodically.9 Several groups … †Results reported for raloxifene 60 mg/d and 120 mg/day groups pooled together. … varied widely between studies, likely due to heterogeneity in case definitions, treatment control groups … discontinuation, the absolute number of events was low and possible differences between treatment groups … continuation and discontinuation arms in one trial reporting because harms results for these two groups
  9. effectivehealthcare.ahrq.gov/sites/default/files/related_files/screening-counseling-interventions-protocol-amendment.pdf
    February 05, 2025 - burden of these disorders.8 Federal Government” mention of gender identities or sexual orientation groups … as specific high risk groups has been removed 2/5/2025 Key questions gender identity, and sexual … Restoring Biological Truth to the Federal Government” mention of gender identities or sexual orientation groups … as specific high risk groups has been removed 2/5/2025 Table 1, PICOTS gender/sex identity, sexual … as specific high risk groups has been removed VIII.
  10. effectivehealthcare.ahrq.gov/sites/default/files/related_files/selecting-evidence.ppt
    January 01, 2010 - For example, the process of assigning individuals to different groups may be inappropriate when patient … Selection bias is bias resulting from the formation of comparison groups. … Detection bias refers to systematic differences in outcome assessments among the comparison groups. … Attrition bias refers to systematic differences among comparison groups in the loss of participants from … Confounding by Indication Confounding by indication is a type of selection bias that occurs when groups
  11. effectivehealthcare.ahrq.gov/sites/default/files/related_files/preterm-birth-terbutaline-pump_disposition-comments.pdf
    September 01, 2011 - Methods (Data Synthesis and Analysis) Given discordance in pathogeneses between these two groups … was kept constant…” (3) Seems like patients had phone contact with nurse “Patients in all three groups … While the data speaks for itself, all of them had different methods and different cohort groups which … We rated it as such because an important flaw was that the groups were not comparable (with respect … In cohort groups the patients necessarily do not receive this level of maternal care.
  12. effectivehealthcare.ahrq.gov/sites/default/files/pdf/congestive-heart-failure-medicines_research.pdf
    March 01, 2010 - However, the effectiveness of H-ISDN in a community sample of African-Americans and other racial/ethnic groups … Comorbidities were identified in the year prior to HF diagnosis according to groups of ICD-9 codes described … with statistically significant and clinically important reductions in mortality in all racial/ethnic groups … our sample who lacked racial or ethnic identifiers, as well as individuals from other racial/ethnic groups … Drug exposure risk windows and unexposed comparator groups for cohort studies in pharmacoepidemiology
  13. effectivehealthcare.ahrq.gov/sites/default/files/selecting-evidence.ppt
    January 01, 2010 - For example, the process of assigning individuals to different groups may be inappropriate when patient … Selection bias is bias resulting from the formation of comparison groups. … Detection bias refers to systematic differences in outcome assessments among the comparison groups. … Attrition bias refers to systematic differences among comparison groups in the loss of participants from … Confounding by Indication Confounding by indication is a type of selection bias that occurs when groups
  14. effectivehealthcare.ahrq.gov/sites/default/files/haller.pdf
    May 29, 2025 - We're living in an age where a lot of groups or ethnic groups and minority groups are actually using … And also there's forms of online communities that are used for focus groups where you don't bring people
  15. effectivehealthcare.ahrq.gov/sites/default/files/pdf/antibiotics-respiratory-infection_research-protocol.pdf
    September 22, 2014 - pediatric patients with acute RTI, healthy adults and/or children without a current acute RTI, or groups … as applying to patients versus a broader population (e.g. the general public, or targeted healthy groups … group together studies that use similar definitions of appropriateness and categorize the different groupsgroups,!such! as!employers!or! school!officials! Intermediate!Outcomes! ! Improved!patient! … methods used for randomization, allocation concealment, and blinding; the similarity of compared groups
  16. effectivehealthcare.ahrq.gov/sites/default/files/related_files/version-2-risk-of-reinfection-from-SARSCoV2_0.pdf
    December 31, 2022 - Selection bias could spuriously drive effect size up or down if some groups in the target population … (16.92 per 100,000 person- days versus 27.42 to 38.13 in the younger groups.) … Additionally, three studies will include groups of vaccinated individuals in their cohorts. … Were the two groups similar and recruited from the same population? 2. … Were the exposures measured similarly to assign people to both exposed and unexposed groups? 3.
  17. effectivehealthcare.ahrq.gov/sites/default/files/related_files/glaucoma-treatment_surveillance.pdf
    January 01, 2013 - Other Experts Conclusion from SCEPC significant differences in IOP reduction between the two groups … trabeculectomy with MMC vs. 5FU showed 1 case each of blebitis and endophthalmitis in in both groups … OR randomized [tiab] OR placebo [tiab] OR drug therapy [sh] OR randomly [tiab] OR trial [tiab] OR groups … Frequency of postop complications was similar between groups Dahan 201222 Prospective randomized … ; survival analysis indicated time to 50% failure was similar in both groups.
  18. effectivehealthcare.ahrq.gov/sites/default/files/related_files/hepatitis-c-treatment-adherence_executive.pdf
    September 22, 2011 - The study did not report statistical tests of changes over time or of differences between groups. … Among genotype 1 patients, SVR rate did not differ between groups. … Patients in the intervention groups had approximately 50-percent higher odds of adhering to therapy … or continuing with treatment at 24-48 weeks compared with control groups. … The reasons patients did not finish recommended treatment did not differ between the two groups and
  19. effectivehealthcare.ahrq.gov/sites/default/files/related_files/depression-pregnancy-postpartum_disposition-comments.pdf
    July 08, 2014 - However, one wonders about the selection of those groups as the gold standard. … While we think of a comparison of these two groups as adequately controlling for the effects of depression … Comparing those two groups may not be substantially different than comparing women with a history of … TEP Member #9 Methods well laid out. especially issues related to comparability of specific groups … Neither showed statistically significant differences between groups, although the study size makes
  20. effectivehealthcare.ahrq.gov/sites/default/files/pdf/public-reporting-quality-improvement_research-protocol.pdf
    August 17, 2011 - lead to change in health care delivery structures or processes (at levels of individual providers, groups … • We will evaluate trials in terms of how the intervention and comparison groups were constructed … (e.g., randomization), the comparability of the groups at baseline and throughout the study (including … observational studies will focus on potential bias in the construction of comparisons (either across groups … If this is not possible, we will use qualitative groups of public reporting interventions to identify

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