Characteristics of the eight studies included in the meta-regression analysis on whole grain intake and occurrence of type 2 diabetes.

1Information on how whole grain intakes were reported in the original publication (as amounts of whole grain foods or of whole grain ingredients, with the unit used indicated in brackets).
2Median values of lowest and highest categories of whole grain intakes, standardized in g/d of whole grain ingredients (except if indicated otherwise).
FFQ, food frequency questionnaire. HPFS, Health Professionals Follow-up Study. N, number of subjects. NA, not applicable. NHS, Nurses’ Health Study. T2D, type 2 diabetes. WG, whole grains. WHI OS: Women’s Health Initiative Observational Study. Y, years.
Characteristics of the eight studies included in the meta-regression analysis on whole grain intake and occurrence of type 2 diabetes.