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Table 1 Barriers related to the grade strength of the evidence

From: The European Society of Human Reproduction and Embryology guideline for the diagnosis and treatment of endometriosis: an electronic guideline implementability appraisal

Grading

Items

Barriers

Proportion of barriers to items

(in percentage)

Total

(in percentage)

A

260

26

10.0

26/260

(10.0)

B

C

D

GPP

19

51

19

226

3

5

4

40

15.8

9.8

21.1

17.7

52/315

(16.5)

  1. Strength of evidence
  2. Grade A: Directly based on level 1 evidence
  3. Grade B: Directly based on level 2 evidence or extrapolated recommendation from level 1 evidence
  4. Grade C: Directly based on level 3 evidence or extrapolated recommendation from either level 1 or level 2 evidence
  5. Grade D: Directly based on level 4 evidence or extrapolated recommendation from either level 1, 2, or 3 evidence
  6. Grade GPP: Good practice point based upon the views of the Guideline Development Group
  7. Hierarchy of evidence
  8. Level Evidence
  9. 1a Systematic review and meta-analysis of randomised controlled trials
  10. 1b At least one randomised controlled trial
  11. 2a At least one well-designed controlled study without randomisation
  12. 2b At least one other type of well-designed quasi-experimental study
  13. 3 Well-designed, nonexperimental, descriptive studies, such as comparative studies, correlation studies, or case studies
  14. 4 Expert committee reports or opinions and/or clinical experience of respected authorities