| Literature DB >> 30599040 |
Christian Jenssen1, Odd Helge Gilja2, Andreas L Serra3, Fabio Piscaglia4, Christoph F Dietrich5, Lynne Rudd6, Paul S Sidhu7.
Abstract
This document summarizes principles and methodology to guide the creation of Clinical Practice Guidelines, Position Statements und Technological Reviews of the European Federation of Societies for Ultrasound in Medicine and Biology (EFSUMB). The purpose of EFSUMB Clinical Practice Guidelines is to provide physicians and sonographers performing or requesting diagnostic and interventional ultrasound examinations with evidence-based recommendations. Position Statements summarize EFSUMB opinions on important current issues in clinical applications, education and training of ultrasound techniques or health care policy related to ultrasound-based imaging and ultrasound-guided interventions. The third type of EFSUMB policy document is the Technological Review, which describes ultrasound techniques and technologies for physicians, medical technicians, engineers and physicists developing ultrasound technology. The whole process of development of EFSUMB policy documents is explained beginning with the decision regarding topics, selection of authors, funding, and planning of the developmental process. Further steps described in this document are the review of the evidence, creation of recommendations, statements and comments, grading of level of evidence and strength of recommendations, and consensus process. Finally, rules for the creation, review, approval, publication and update of EFSUMB policy documents are described.Entities:
Keywords: clinical practice guidelines; evidence; position statements; technological reviews; ultrasound
Year: 2018 PMID: 30599040 PMCID: PMC6251059 DOI: 10.1055/a-0770-3965
Source DB: PubMed Journal: Ultrasound Int Open ISSN: 2199-7152
Table 1 Rating the levels of evidence (LoE) for EFSUMB CPGs based on the Oxford Center of Evidence-Based Medicine (OCEBM) system, version 2 (2011; modified from 36 ).
| Clinical question | LoE 1* | LoE 2* | LoE 3* | LoE 4* | LoE 5* |
|---|---|---|---|---|---|
| How common is the problem? | Local and current random sample surveys (or censuses) | Systematic review of surveys that allow matching to local circumstances** | Local non-random sample** | Case series** | Not applicable |
| Is this diagnostic test accurate? (Diagnosis) | Systematic review of cross-sectional studies with consistently applied reference standard and blinding | Individual cross-sectional study with consistently applied reference standard and blinding | Non-consecutive studies, or studies without consistently applied reference standards** | Case control studies or poor or non-independent reference standard** | Mechanism-based reasoning |
| What will happen if we do not add a therapy? (Prognosis) | Systematic review of inception cohort studies | Inception cohort studies | Cohort study or control arm of randomized trial** | Case series or case control studies or poor quality prognostic cohort study** | Not applicable |
| Does this intervention help? (Treatment Benefits) |
Systematic review of randomized trials or
| Randomized trial or observational study with dramatic effect | Non-randomized controlled cohort/follow-up study** | Case series, case control studies, or historically controlled studies** | Mechanism-based reasoning |
| What are the common harms? (Treatment Harms) |
Systematic review of randomized trials, systematic review of nested case control studies,
| Individual randomized trial or (exceptionally) observational study with dramatic effect | Non-randomized controlled cohort/follow-up study (post-marketing surveillance) provided there are sufficient numbers to rule out a common harm (for long-term harms the duration of follow-up must be sufficient)** | Case series, case control studies, or historically controlled studies** | Mechanism-based reasoning |
| What are the rare harms? (Treatment Harms) |
Systematic review of randomized trials or
| Randomized trial or (exceptionally) observational study with dramatic effect | |||
| Is this (early detection) test worthwhile? (Screening) | Systematic review of randomized trials | Randomized trial | Non-randomized controlled cohort/follow-up study** | Case series, case control studies, or historically controlled studies** | Mechanism-based reasoning |
* LoE may be graded down on the basis of study quality, imprecision, indirectness (study PICO does not match questions PICO), because of inconsistency between studies, or because the absolute effect size is very small; LoE may be graded up if there is a large or very large effect size. PICO : P atient, P opulation, or P roblem; I ntervention, Prognostic factor, or Exposure; C omparison of intervention (if appropriate); O utcome you would like to measure or achieve)
** A systematic review is generally better than an individual study.
Table 2 Strength of recommendations in EFSUMB CPGs according to GRADE: Interpretation, evaluation criteria, wording, and implications (criteria modified from 47 53 54 55 56 57 ).
| Strong recommendation | Weak recommendation | |
|---|---|---|
|
| ||
| General meaning | Clear preference for or against one alternative course of action. Recommendation applies for almost all patients. |
Closer balance between desirable and undesirable consequences of alternative strategies.
Recommendation may be conditional upon
Patient values and preferences The resources available The setting in which the intervention/technique will be implemented. |
|
| Estimate of effect is large. Desirable effects clearly outweigh undesirable ones. | Estimate of effect is small. Desirable effects likely or slightly outweigh undesirable ones. |
|
| Disadvantages/risks of an intervention/technique are substantial. Undesirable effects clearly outweigh desirable ones. | Disadvantages/risks of an intervention/technique are mentionable. Undesirable effects likely or slightly outweigh desirable ones. |
|
| ||
| Difference between benefits and harms or burden | High net benefit or harm. | Low net benefit or harm. |
| Level of evidence | High (LoE 1 and 2). High level of certainty about the magnitude of particular desirable and undesirable consequences of the recommended intervention/technique. | Low (LoE 3 and 4). Low level of certainty about the magnitude of particular desirable and undesirable consequences of the suggested intervention/technique. |
| Values and preferences that patients assign to outcomes of interest | Low variability or uncertainty. | High variability or uncertainty. |
| Resource implications | Required resources are lower than for alternative strategy. Reasonable cost-efficiency. | Required resources are higher than for alternative strategy. Debatable cost-efficiency. |
| Feasibility, accessibility, equity | Recommended intervention/technique is feasible, widely available and accessible. Inequities in health care are reduced or health equity is promoted. | Feasibility, availability and/or accessibility of the suggested intervention/technique are limited. Particular groups of patients or settings might be disadvantaged with regard to the suggested intervention/technique. |
|
| ||
| Positive recommendation (for a particular intervention/technique) | „EFSUMB recommends …“ “… should be performed.” | „EFSUMB suggests ….“ “… might be performed.” |
| Negative recommendation (against a particular intervention/technique) | „EFSUMB recommends against “ “… should not be performed.” | „EFSUMB suggests ….“ “… might not be performed.” Comment should give an explanation about the issues that would cause decisions to vary. |
|
| Uniformity of choice. | Variability of choice. |
| Patients | Almost all informed patients would make the recommended choice for or against an intervention. | The majority of informed patients would choose the suggested intervention/technique, but a substantial number would not. |
| Physicians | The recommended intervention/technique should be applied in most patients. | Different choices will be appropriate depending on particular patient characteristics and settings. Greater effort should be made to help an individual patient to come to a decision consistent with his/her own values and preferences. Formal decision aids and shared decision-making are particularly useful. |
| Policy-makers | The recommendation can be adopted as a policy in most situations. Variability in clinical practice between individuals or regions may be inappropriate. Recommendation is a potential candidate for quality of care criterion. | Substantial debate and involvement of many stakeholders is necessary before a policy decision is made. Variability in clinical practice between individuals or regions may be acceptable. |
Table 3 Rules for approval of recommendations and statements for EFSUMB CPGs by consensus.
| Result of voting | Percentage of votes in favor of the statement/recommendation | Consequences |
|---|---|---|
| Strong consensus | > 95% | Recommendation/statement is adopted. |
| Broad agreement | > 75-95% | Recommendation/statement is adopted. |
| Majority consensus | > 50-75% | Discussion and attempt to rephrase the recommendation/statement using a nominal group process. A rephrased or an alternative recommendation/statement is voted on. The rephrased or an alternative recommendation/statement is adopted with >75% of votes. A rephrased or alternative recommendation/statement is rejected with ≤75% of votes. Missing consent on the particular key question will be recorded and explained in the text of the policy document. |
| Primary disagreement | ≤ 50% | The particular recommendation/statement is rejected and will not be published in the policy document. Voting on an alternative recommendation/statement on the particular key question is possible. |