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Table 1 Grading statements and recommendations [10]

From: Options on fibroid morcellation: a literature review

Recommended grade

Evidence

A

Directly based on category I evidence

B

Directly based on:

• Category II evidence, or

• Extrapolated recommendation from category I evidence

C

Directly based on:

• Category III evidence, or

• Extrapolated recommendation from category I or II evidence

D

Directly based on:

• Category IV evidence, or

• Extrapolated recommendation from category I, II or III evidence

Good practice point

The view of the Guideline Development Group

NICE 2002

Recommendation taken from the NICE technology appraisal

Evidence category

Source

Ia

Systematic review and meta-analysis of randomised controlled trials

Ib

At least one randomised controlled trial

IIa

At least one well-designed controlled study without randomisation

IIb

At least one other type of well-designed quasi-experimental study

III

Well-designed non-experimental descriptive studies, such as comparative studies, correlation studies or case studies

IV

Expert committee reports or opinions and/or clinical experience of respected authorities

  1. Adapted from Eccles M, Mason J (2001) How to develop cost-conscious guidelines. Health Technology Assessment 5 (16)