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Applicability Resources. Clinical experts and stakeholders can provide general information important to framing applicability issues. What does the population of interest looks like? What types of care or procedures are routine or represent standard of care? Are certain subpopulations characteristically different from others?
Key Messages (I) The PICOS framework is useful for organizing contextual factors of interest. Input from clinical experts/stakeholders and a review of current practices can help identify specific applicability issues. Population-based surveys, pharmacoepidemiologic studies, and large case series or registries can help determine how trial populations and circumstances differ from normal practice. PICOS = population, intervention, comparators, outcomes, and setting.

Key Messages (I)

The Comparative Effectiveness Review Development Process

The CER Development ProcessThe comparative effectiveness review (CER) topic, Comparative Effectiveness of Nonoperative and Operative Treatments for Rotator Cuff Tears, was nominated in a public process. The nominated topic was reviewed and selected based on need, importance, and feasibility. Sufficient research into the current literature by experts in the field and stakeholders determined that a CER on the operative and nonoperative treatments and postoperative rehabilitation of rotator cuff tears was needed and would not duplicate existing work. Based on this research, key clinical questions that the report would address were developed and made available for public comment. The Agency for Healthcare Research and Quality (AHRQ) then commissioned the University of Alberta Evidence-Based Practice Center to prepare the CER with input from a Technical Expert Panel. This advisory panel was comprised of experts in different specialties, including sports medicine, preventative medicine, physical therapy, internal medicine, and orthopedic surgery. The panel identified important issues, reviewed proposed methods, defined parameters for the review of evidence, and helped develop the draft report.
Strength of Evidence Grades (I). Reflect a global assessment that: Takes the required domains directly into account. Incorporates judgments about the additional domains as needed. Aim to: Provide “actionable” information for a variety of different users, readers, and stakeholders. Be transparent in how the strength-of-evidence grades are reached.

Strength of Evidence Grades (I)

Comparison With the GRADE System. The grading system used by the Evidence-based Practice Centers (EPCs) is similar to the GRADE system. The EPC grading system reflects the needs of AHRQ stakeholders for reviews on a wide variety of topics and not for recommendations or guidelines. The main differences between the two grading systems: The definitions of domains differ slightly; in the EPC system “directness” excludes “applicability,” which is handled separately. In the EPC system, observational studies are considered to have less risk of bias for outcomes such as harms, which can raise the initial grade to “moderate.” The definition of overall grade differs; the EPC system emphasizes confidence in estimate, whereas the GRADE system emphasizes effect of future research. The EPC system permits three different ways to reach an overall strength-of -evidence grade; the GRADE formula has one.
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