Association of gestational metabolic syndrome with the Chinese Healthy Eating Index in mid-pregnancy: a cross-sectional study

Table 1 Components and evaluation methods of China Healthy Diet Index

CHEI components	DGG-2022 recommended intakes	Criteria for minimum values (0)	Criterion of maximum value	Maximum value
The percentage of total energy supplied by carbohydrates^†	50–65%	0% or 100%	50–65%	5
Whole grains as a percentage of carbohydrate > 1/3^†	75–100 g/d	0 g/d	≥ 87.5 g/d	5
Potatoes^†	75 g/d	0 g/d	≥ 75 g/d	5
Vegetables^†	400–500 g/d	0 g/d	≥ 450 g/d	5
Dark green vegetables > 2/3^†	> 267 g	0 g/d	≥ 333 g	5
Seaweeds^†	100 g/w	0 g/d	≥ 100 g/w	5
Fruits^†	200–300 g/d	0 g/d	≥ 250 g/d	10
Dairy^†	300 g	0 g/d	≥ 300 g/d	5
Beans^†	20 g	0 g/d	≥ 20 g/d	5
Nuts^†	10 g	0 g/d	≥ 10 g/d	5
Fishes and shrimps^*	50–75 g/d	0 g/d	≥ 62.5 g/d, < 75 g/d	5
livestock and poultry meats*	50–75 g	0 g/d	≥ 62.5 g/d, < 75 g/d	5
Liver/blood products^*	20–50 g/w	0 g/d	≥ 35 g/w, < 50 g/d	5
Eggs^*	50 g	0 g/d	50 g/d	5
Oils^#	25 g/d	≥ 50 g/d	< 25 g/d	10
Salt^#	5 g/d	≥ 10 g/d	< 5 g/d	10
Sugar^#	25–50 g	≥ 50 g/d	< 25 g/d	5

Calculation methods: ^†"adequate" intake category. *"moderate" intake category. ^#"limited" intake category
^†,^*Using a two-way scoring method, lower than the minimum limit to reduce the score, the score = 5/recommended intake × actual intake; higher than the maximum limit to reduce the same score, the score = 5–5/recommended intake × (actual intake − recommended intake)
^#Higher than the maximum value and less than twice the maximum value is proportionally reduced points, the score = 10–10/recommended value × (actual intake − recommended value)

ISSN: 1743-7075