healthy diet score by U.S. Dietary Guidelines

Calculate a 0–7 healthy diet score using seven components (vegetables, fruit, fish, whole grains, refined grains, processed meat, unprocessed meat) following the U.S. Dietary Guidelines targets. Each component meeting its intake target contributes 1 point; higher scores indicate healthier patterns.

Usage

leo_diet_us(
  fresh_fruit,
  dried_fruit,
  cooked_veg,
  salad_veg,
  oily_fish,
  non_oily_fish,
  bread_intake,
  bread_type,
  cereal_intake,
  cereal_type,
  processed_meat,
  age_last_meat,
  poultry,
  beef,
  lamb,
  pork,
  ...
)

Arguments

fresh_fruit: Fresh fruit pieces per day.
dried_fruit: Dried fruit pieces per day (5 pieces = 1 serving).
cooked_veg: Cooked vegetables tablespoons per day (3 tbsp = 1 serving).
salad_veg: Salad/raw vegetables tablespoons per day (3 tbsp = 1 serving).
oily_fish: Oily fish frequency code (p1329_i0, 0–5 per Data-Coding 100377).
non_oily_fish: Non-oily fish frequency code (p1339_i0, 0–5 per Data-Coding 100377).
bread_intake: Bread slices per week (p1438_i0); -10 treated as 0/week (less than once).
bread_type: Bread type code (p1448_i0): 1=White, 2=Brown, 3=Wholemeal, 4=Other.
cereal_intake: Cereal bowls per week (p1458_i0); -10 treated as 0/week.
cereal_type: Cereal type code (p1468_i0): 1=Bran, 2=Biscuit, 3=Oat, 4=Muesli, 5=Other.
processed_meat: Processed meat frequency code (p1349_i0, 0–5 per Data-Coding 100377).
age_last_meat: Age when last ate meat (p3680_i0); 0 = never ate meat.
poultry: Poultry frequency code (p1359_i0, 0–5 per Data-Coding 100377).
beef: Beef frequency code (p1369_i0, 0–5 per Data-Coding 100377).
lamb: Lamb/mutton frequency code (p1379_i0, 0–5 per Data-Coding 100377).
pork: Pork frequency code (p1389_i0, 0–5 per Data-Coding 100377).
...: Reserved for future use.

Value

Integer vector in 0,7; NA if any component cannot be evaluated for a row.

Details

Field expectations (UKB instance 0):

Fruits: p1309_i0 (fresh pieces/day), p1319_i0 (dried pieces/day; 5 pieces = 1 serving)
Vegetables: p1289_i0 (cooked tablespoons/day), p1299_i0 (salad tablespoons/day; 3 tbsp = 1 serving)
Fish: p1329_i0 (oily fish frequency code), p1339_i0 (non-oily fish frequency code)
Bread: p1438_i0 (slices/week, -10 = "less than once"), p1448_i0 (type: 1=White, 2=Brown, 3=Wholemeal, 4=Other)
Cereal: p1458_i0 (bowls/week, -10 = "less than once"), p1468_i0 (type: 1=Bran, 2=Biscuit, 3=Oat, 4=Muesli, 5=Other)
Processed meat: p1349_i0 (frequency code 0–5, per Data-Coding 100377); p3680_i0 == 0 implies never ate meat
Unprocessed meat: p1359_i0 (poultry), p1369_i0 (beef), p1379_i0 (lamb), p1389_i0 (pork) — all frequency codes 0–5

All frequency fields (100377) encode: 0=Never, 1=<1/wk, 2=1/wk, 3=2–4/wk, 4=5–6/wk, 5=Daily. To meet component thresholds, frequency codes must be converted to weekly servings (e.g., code 2 → 1/wk, code 3 → 3/wk midpoint, code 5 → 7/wk).

Whole grains: bread_type==3 (wholemeal) + cereal_type in (1,3,4) (bran/oat/muesli) Refined grains: bread_type in (1,2,4) (white/brown/other) + cereal_type in (2,5) (biscuit/other)