The Claim

The WHO Regional Office for the Americas (PAHO) nutritional classification model demonstrates only fair agreement (κ=0.28) with the Ofcom model when classifying the nutritional quality of over 15,000 Canadian packaged foods, with 33.4% discordance arising from PAHO's use of sodium per energy unit leading to systematic misclassification of nutrient-dense, naturally high-sodium foods as unhealthy, whereas Ofcom uses sodium per 100g.

Source: Comparison of nutrient profiling models for assessing the nutritional quality of foods: a validation study

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
44score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Description
1 study reviewed
In plain English

Two different systems for rating the healthiness of packaged foods in Canada disagree on one-third of products because one system rates foods high in natural sodium as unhealthy based on calorie content, while the other rates them based on sodium amount per fixed weight.

See the scientific wording

The WHO Regional Office for the Americas (PAHO) model shows only fair agreement (κ=0.28) with Ofcom in classifying the nutritional quality of over 15,000 Canadian packaged foods, with 33.4% discordance, primarily because PAHO classifies legumes and other minimally processed foods as 'excessive' based on sodium per energy unit, while Ofcom uses sodium per 100g, leading to systematic misclassification of nutrient-dense, naturally high-sodium foods as unhealthy.

Why this might work

When a food has naturally high sodium but low calories, measuring sodium relative to calories makes it look unhealthy, even though it is nutrient-rich. A different method that measures sodium per fixed weight avoids this error and correctly identifies the food as healthy.

Supported mechanismbased on 1 study

What the research says

1 study

  1. Study: Comparison of nutrient profiling models for assessing the nutritional quality of foods: a validation study

    The study found that PAHO’s nutrition scoring system often calls healthy foods like beans and lentils 'unhealthy' because it judges sodium based on calories, not serving size — unlike Ofcom, which gets it right more often. This mismatch causes PAHO to unfairly flag nutritious foods as bad.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

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