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Table 1 Food grouping used in the dietary pattern analyses

From: Empirically derived dietary patterns and constipation among a middle-aged population from China, 2016–2018

Food groups

Food items

Refined grains

Rice, porridge, rice in soup, noodles,instant noodles,steamed bun, wonton, dumplings, white breads, toasted bread

Whole grains

Corn, sorghum, millet, oats

Tubers

Sweet potato, potato, taro

Vegetables

Wild vegetables, green vegetable, spinach, green peppers, tomato Chinese cabbage, radish, cucumer, eggplant

Fruit

Apple,pears, peach, apricots,cherries,grapes,bananas,cantaloupe,watermelon, oranges, grapefruit, kiwi,strawberries and et al

Pickled vegetables

Salted vegetables, Chinese sauerkraut

Mushrooms

Mushroom, shiitakes, enoki

Red meat

Pork, mutton, beef

Poultry and organs

Chicken, duck, liver, animal blood

Processed and cooked meat

Ham and sausage, sauced pork, roast duck

Fish and shrimp

Fish, shrimp

Eggs

Duck eggs, chicken eggs

Seafood

Sea fish, shrimp, crab,squid, jellyfis, shellfish

Bacon and salted fish

Salted meat and duck, salted fish

Salted and preserved eggs

Salted duck and chicken eggs, preserved eggs

milk

Liquid milk, milk powder, yoghurt

Cheese

Cheese

Soya bean and its products

Tofu, dried bean curd, soy milk

Miscellaneous bean

Mung beans, red beans, hemp beans

Fats

Lard, butter

Vegetable oil

Soybean oil, tea oil, rapeseed oil, olive oil

Fast foods

KFC, Mcdonald,fried dough sticks and twists, fried cakes,pizza

Nuts

Walnut, peanuts, almonds, melon seeds

Snacks

Cookies, sachima, bread, cake, ice cream, candy, sweets,potato chips, shrimp roll, popcorn

Chocolates

Chocolates

Honey

Honey, hydromel

Drinks

Coca-cola, sprite, fruit and vegetable drink, fruits juice

Alcoholic beverages

Beer, fruit wine, grape wine

Tea

Tea,scented tea, wong Lo Kat

Coffee

Coffee