Cohort Profile: The Northeast China Biobank (NEC-Biobank).

The intake of each nutrient was calculated using the Chinese Food Composition Tables, by first multiplying the quantity (grams) of each food and beverage item consumed by their nutrient content per gram, and then adding the nutrient contributions from all food items. We also collected data on the intake of 110 food items by using a validated FFQ for most of the participants; this allowed us to explore the associations between intake of food items and nutrients, as well as dietary patterns and health outcomes. Key Features Only few large, prospective cohort studies on interaction between dietary and environmental exposures and non-communicable diseases (NCDs) have been conducted in Northeast China. Daily food intake The intake of food and beverage items was calculated by multiplying fitted portion sizes (according to sex, g/time) by the frequency at which each food and beverage item was consumed per day in the FFQ. [Extracted from the article]