Table 2.

Components of the Planetary Health Diet Index for children and adolescents (PHDI-C), recommended percentages of total caloric intake for children and adolescents, and formulae to calculate each component score

PHDI-C Components	Recommended % of total caloric intake for children a,b	Recommended % of total caloric intake for adolescents a,b	Maximum possible score	Formulae to calculate each component score
	Optimal value (range)	Optimal value (range)
Adequacy components
Nuts and peanuts	≥ 11.6 (0, 100)	≥ 11.6 (0, 100)	10	$score\left(x\right)=\left\{\begin{array}{cc}\frac{10\times x}{A}\hfill & if|x\le A\hfill \\ 10\hfill & if|x>A\hfill \end{array}\right)$ For a given adequacy component, x is the percentage of calories consumed and A is the optimal recommended value
Legumes	≥ 11.3 (0, 100)	≥ 11.3 (0, 100)	10
Fruits	≥ 5.0 (0, 100)	≥ 5.0 (0, 100)	10
Vegetables	≥ 3.1 (0, 100)	≥ 3.1 (0, 100)	10
Ratio components
Dark green vegetables ratio	29.5 (0.0, 100)	29.5 (0.0, 100)	5	$score\left(x\right)=\left\{\begin{array}{cc}\hfill \frac{C\times x}{A}& if|x\le A\hfill \\ \hfill \left(\frac{C\times 100}{(100-A)}\right)-\left(\frac{C}{(100-A)\times x}\right)& if|x>A\hfill \end{array}\right)$ For a given ratio component, x is the percentage of calories consumed, A is the optimal recommended value, and C is the maximum possible score
Red and orange vegetables ratio	38.5 (0.0, 100)	38.5 (0.0, 100)	5
Whole cereals ratio	75.0 (0.0, 100)	75.0 (0.0, 100)	10
Optimum components
Cereals	30.0 (0.0, 60.0)	30.0 (0.0, 60.0)	10	$score\left(x\right)=\left\{\begin{array}{cc}\hfill \frac{10\times x}{A}& if|x\le A\hfill \\ \hfill \left(\frac{10\times B}{B-A}\right)-\left(\frac{10}{(B-A)\times x}\right)& if|A<x<B\hfill \\ \hfill 0& if|x\ge B\hfill \end{array}\right)$ For a given optimum component, x is the percentage of calories consumed, A is the optimal recommended value, and B is the upper limit of the recommended range
Tubers and potatoes	1.6 (0.0, 3.1)	1.6 (0.0, 3.1)	10
Dairy products	12.2 (0.0, 24.4)	6.1 (0, 12.2)	10
Eggs and white meats	6.2 (0.0, 12.2)	6.2 (0.0, 12.2)	10
Vegetable oils	14.1 (0.0, 28.3)	14.1 (0.0, 28.3)	10
Moderation components
Palm oil	0.0 (0.0, 2.4)	0.0 (0.0, 2.4)	10	$score\left(x\right)=\left\{\begin{array}{cc}\hfill 10& if|x=0\hfill \\ \hfill 10-\left(\frac{10}{B\times x}\right)& if|0<x<B\hfill \\ \hfill 0& if|x\ge B\hfill \end{array}\right)$ For a given moderation component, x is the percentage of calories consumed, and B is the upper limit of the recommended range
Red meats	0.0 (0.0, 2.4)	0.0 (0.0, 2.4)	10
Animal fats	0.0 (0.0, 1.4)	0.0 (0.0, 1.4)	10
Added sugars	0.0 (0.0, 4.8)	0.0 (0.0, 4.8)	10
Total score			150

^aAll values were calculated based on the EAT-Lancet diet [5] and modifications were made to meet the nutritional requirements of children and adolescents [38, 40]

^bMost values are expressed as percentages of total caloric intake, except for the dark green vegetables and the red and orange vegetables ratio components which are expressed as percentage of total calories from vegetables, and the whole cereals ratio which is expressed as percentage of total calories from cereals