Table 2Grading of recommendations

GradeEvidence
A
B
  • A body of evidence including studies rated as 2++, directly applicable to the target population, and demonstrating overall consistency of results, or
  • Extrapolated evidence from studies rated as 1++ or 1+
C
  • A body of evidence including studies rated as 2+, directly applicable to the target population and demonstrating overall consistency of results, or
  • Extrapolated evidence from studies rated mmas 2++
D
  • Evidence level 3 or 4, or
  • Extrapolated evidence from studies rated as 2+, or
  • Formal consensus
D (GPP)A good practice point (GPP) is a recommendation for best practice based on the experience of the Guideline Development Group

From: 1, Introduction and methods

Cover of Nutrition Support for Adults
Nutrition Support for Adults: Oral Nutrition Support, Enteral Tube Feeding and Parenteral Nutrition.
NICE Clinical Guidelines, No. 32.
National Collaborating Centre for Acute Care (UK).
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