Standardised scores of correct answers for objective understanding of nutritional quality and ultraprocessing in the two arms, NutriNet-Santé, 2022, France, n=21 159
| Average standardised score (/100) of correct answers in control arm | Average standardised score (/100) of correct answers in experimental arm | Cohen’s d | P value (from Mann-Whitney Test) | |
| All products | ||||
| Objective understanding of nutritional quality | 30.2 | 44.0 | 0.53 | <0.0001 |
| Objective understanding of ultraprocessing | 64.5 | 91.7 | 1.39 | <0.0001 |
| Cookies | ||||
| Objective understanding of nutritional quality | 21.0 | 38.7 | 0.46 | <0.0001 |
| Objective understanding of ultraprocessing | 61.8 | 90.0 | 1.28 | <0.0001 |
| Breakfast cereals | ||||
| Objective understanding of nutritional quality | 36.3 | 50.3 | 0.47 | <0.0001 |
| Objective understanding of ultraprocessing | 70.3 | 92.9 | 1.14 | <0.0001 |
| Ready-to-eat meals | ||||
| Objective understanding of nutritional quality | 33.0 | 43.0 | 0.32 | <0.0001 |
| Objective understanding of ultraprocessing | 61.9 | 92.6 | 1.34 | <0.0001 |