Development of a sustainable diet index in US adults
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View abstract on PubMed
Summary
This summary is machine-generated.A new Sustainable Diet Index for US adults (SDI-US) was validated to measure healthy eating and environmental impact. This index can track progress in sustainable diets across the US population.
Area Of Science
- Nutrition Science
- Environmental Health
- Public Health Policy
Background
- A sustainable food system is crucial for human and planetary health.
- Developing a quantitative index for sustainable diets is essential for monitoring progress in the US.
- This study evaluated the validity of a Sustainable Diet Index for US adults (SDI-US).
Purpose Of The Study
- To assess the content and construct validity of the SDI-US for US adults.
- To adapt and validate a sustainable diet index for the US population.
- To provide a tool for monitoring dietary sustainability in the US.
Main Methods
- The SDI-US was adapted from a French index using data from US adults (aged 20+) from NHANES (2007-2018).
- The index comprises 12 indicators across four dimensions: nutritional quality, environmental impact, affordability, and sociocultural factors.
- Validation involved assessing indicator relevance, correlations, subgroup differences, and associations with other dietary scores (aMed, EAT-Lancet).
Main Results
- The mean SDI-US score was 13.1.
- Correlations between SDI-US and its sub-indices ranged from 0.39 (environmental) to 0.61 (economic).
- Higher SDI-US quintiles were significantly associated with higher aMed and EAT-Lancet diet scores.
Conclusions
- The SDI-US demonstrates acceptable content and construct validity for assessing sustainable diets in the US.
- The index integrates key features of sustainable diets, similar to its French counterpart.
- The SDI-US is a valuable tool for monitoring and improving dietary sustainability among US adults.
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