Dietary Pattern Flashcards
(27 cards)
What do the abbreviations PDI, hPDI and uPDI stand for?
Plant-Based Diet Index; healthful Plant-Based Diet Index; unhealthful Plant-Based Diet Index.
Core purpose of the overall PDI?
Quantifies total plant-based intake, regardless of quality.
Core purpose of the hPDI?
Tracks adherence to a high-quality plant-based diet rich in whole, minimally-processed plant foods.
Core purpose of the uPDI?
Captures adherence to a poor-quality plant-based diet high in refined, sugary or ultra-processed plant foods.
How many food groups feed into each index?
18 food groups divided into healthy plant, less-healthy plant and animal categories.
Scoring rule for healthy plant foods in PDI?
Positive scoring (higher quintile = more points).
Scoring rule for healthy plant foods in hPDI?
Positive scoring (same as PDI).
Scoring rule for healthy plant foods in uPDI?
Reverse scoring (higher quintile = fewer points).
Scoring rule for less-healthy plant foods in PDI?
Positive scoring.
Scoring rule for less-healthy plant foods in hPDI?
Reverse scoring.
Scoring rule for less-healthy plant foods in uPDI?
Positive scoring.
Point assignment for quintiles (highest vs lowest intake)?
Highest quintile = 5 pts; lowest = 1 pt (reverse if scoring is reversed).
Total possible score range for any index?
18 – 90 points. Higher = stronger adherence to that pattern.
Give three examples of healthy plant foods used in the study.
Whole-grains, fruits/vegetables, nuts (also legumes, tea/coffee).
Give three examples of less-healthy plant foods.
Sugar-sweetened beverages, refined grains, sweets/desserts (plus fruit juice, potatoes).
List any three animal food categories included.
Meat, dairy, fish/seafood, eggs, animal fat.
Interpretation of a high hPDI score (≥ ≈80th centile)?
Diet rich in wholesome plant foods and low in processed plant & animal foods → potentially cardio-protective.
Interpretation of a high uPDI score?
Diet high in refined/ultra-processed plant items with fewer nutrient-dense plants & animals → adverse CVD profile.
Why keep PDI (overall) in the analysis if quality scores exist?
Acts as a quantity benchmark and controls for plant vs animal shifts independent of food quality.
Which score flips the direction for less-healthy plant foods?
hPDI (protective emphasis).
Which popular drink ends up in the ‘less-healthy’ list?
Fruit juice (scored positive for uPDI, reverse for hPDI).
Beverage considered healthy in the index?
Tea/Coffee (non-sugared).
Mnemonic to remember scoring switches
“H for Healthy → Healthy foods Help (positive); U for Unhealthy → Unhealthy foods get a Up-tick.”
Statistical reason for quintile scoring vs absolute grams?
Minimises energy-misreporting bias and captures relative intake across the cohort.
