U.S. Department of Health and Human Services Community Preventive Services Task Force. Guide to Community Preventive Services. Promoting good nutrition. Available at: Appendix 1: Evidence grading scheme A. This intervention is supported NICE Recommended Intervention OR by good evidence of its systematic review, of moderate to good effectiveness and is quality studies, with meta-analysis of recommended for use in the UK majority of studies favouring intervention effect B. This intervention is supported systematic review of moderate to weak by moderate to good quality studies with meta-analysis favouring evidence of its effectiveness intervention effect or narrative review including moderate to good quality studies with majority demonstrating positive effect C. There is some evidence systematic review of moderate to poor supporting the use of this quality studies with majority favouring intervention but it is not intervention conclusive D. The evidence is inconsistent Systematic review with significant and it is not possible to draw a weakness and high risk of bias (positive conclusion but there is some results) or review of moderate quality evidence of effect with inconsistent findings in favour of the intervention E. There is good evidence to Moderate to good quality systematic suggest that this intervention review of observational or qualitative has a sound theoretical basis or studies which suggest that the that work in this area is likely to intervention addresses a significant risk have an impact but this has not factor or determinant of the behaviour been demonstrated in trials (this of interest would apply particularly to pilot or novel interventions) F. The evidence is inconsistent Systematic review with studies judged and it is not possible to draw a as significant weak/risk of bias conclusion but it tends towards (evidence of no effect) or review of no effect moderate quality studies with inconsistent findings in favour of no effect G. There is some evidence systematic review of moderate to poor suggesting that this intervention quality studies with majority favouring is ineffective but it is not no effect conclusive H. There is moderate to good systematic review of moderate to weak
U.S. Department of Health and Human Services Community Preventive Services Task Force. Guide to Community Preventive Services. Promoting good nutrition. Available at: Appendix 1: Evidence grading scheme A. This intervention is supported by good evidence of its effectiveness and is recommended for use in the UK NICE Recommended Intervention OR systematic review, of moderate to good quality studies, with meta-analysis of majority of studies favouring intervention effect B. This intervention is supported by moderate to good quality evidence of its effectiveness systematic review of moderate to weak studies with meta-analysis favouring intervention effect or narrative review including moderate to good quality studies with majority demonstrating positive effect C. There is some evidence supporting the use of this intervention but it is not conclusive systematic review of moderate to poor quality studies with majority favouring intervention D. The evidence is inconsistent and it is not possible to draw a conclusion but there is some evidence of effect Systematic review with significant weakness and high risk of bias (positive results) or review of moderate quality with inconsistent findings in favour of the intervention E. There is good evidence to suggest that this intervention has a sound theoretical basis or that work in this area is likely to have an impact but this has not been demonstrated in trials (this would apply particularly to pilot or novel interventions) Moderate to good quality systematic review of observational or qualitative studies which suggest that the intervention addresses a significant risk factor or determinant of the behaviour of interest F. The evidence is inconsistent and it is not possible to draw a conclusion but it tends towards no effect Systematic review with studies judged as significant weak/risk of bias (evidence of no effect) or review of moderate quality studies with inconsistent findings in favour of no effect G. There is some evidence suggesting that this intervention is ineffective but it is not conclusive systematic review of moderate to poor quality studies with majority favouring no effect H. There is moderate to good systematic review of moderate to weak
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