Methodology and challenges for harmonization of nutritional data from seven historical studies.

ABSTRACT:

Background

Collection of detailed dietary data is labor intensive and expensive, harmonization of existing data sets has been proposed as an effective tool for research questions in which individual studies are underpowered.

Methods

In this paper, we describe the methodology used to retrospectively harmonize nutritional data from multiple sources, based on the individual participant data of all available studies, which collected nutritional data in Israel between 1963 and 2014. This collaboration was established in order to study the association of red and processed meat with colorectal cancer. Two types of nutritional questionnaires, the Food Frequency Questionnaires (FFQ) and the 24-h dietary recall (24HR recall), and different food composition tables, were used by the par

SUBMITTER: Avraham SB 

PROVIDER: S-EPMC11302319 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature