Table 9. Quality criteria for modelling studies.

#	Criterion description	Issues considered
1.	Clear study description	•  Did the authors provide a clear description of the dietary status/ change evaluated? •  Did the authors provide a clear description of the health impacts evaluated? •  Was the link with climate change mitigation and/or other environmental impacts well described? •  Did the authors give a clear justification of study in a particular area – including a description of current diets?
2.	Appropriate comparison group/situation	•  Were the health and/or environmental impacts of more sustainable diets compared to an appropriate and comparable baseline group/situation?
3.	Model validity/credibility	•  Have the process of internal verification and its results been documented in detail? •  Is there a clear description and/or justification of the assumptions, simplifications, and limitations of the model?
4.	Model suitability	•  Were appropriate studies and/or data used to build the model? •  Was the choice of model appropriate for the study question?
5.	Rigorous and clearly described analysis	•  Are sufficient data presented to support the findings? •  Were analyses described in detail? •  Did the researchers critically examine their potential bias and influence during the analysis and selection of data for presentation/modelling?
6.	Precision of measure of effect	•  What were the assumptions of the model? •  What are the confidence limits? •  Were the confidence limits statistically significant?