Comparison of diet measures from a food-frequency questionnaire with measures from repeated 24-hour dietary recalls. The Norwegian Women and Cancer Study.

OBJECTIVE To compare diet measures from a food-frequency questionnaire (FFQ) with measures from 24-hour dietary recalls (24HDRs). DESIGN The participants answered an FFQ after completing four, repeated 24HDRs during a year. SETTING Norway, nationwide. SUBJECTS Of 500 women randomly selected from The Norwegian Women and Cancer Study (the Norwegian arm… (More)