title: Measuring dietary change in a diet intervention trial: comparing food frequency questionnaire and dietary recalls.
abstract: Measurement of dietary change was assessed in a systematic quota subsample (n = 397) of women recruited into the Women's Healthy Eating and Living Study between 1996 and 1998, a multicenter, randomized dietary intervention trial among breast cancer survivors. Women from the intervention and comparison arms completed the Arizona Food Frequency Questionnaire (AFFQ) and 24-hour dietary recalls at baseline (prerandomization) and at year 1 (postrandomization). Both dietary measurement methods demonstrated significant changes in intake of key intervention-associated nutrients at year 1 in the intervention group subjects compared with minimal or no change in the comparison group subjects. The reliability of the AFFQ and recalls was measured in the comparison group and showed correlations of 0.63 and 0.43, respectively. Both instruments captured differences in dietary intake associated with the diet intervention. These results demonstrate the utility of using a multimode, multimethod approach (AFFQ and 24-hour dietary recalls) to measure differences in self-reported dietary intake over time as shown in this dietary intervention trial being conducted among breast cancer survivors.
authors.affiliation: University of Arizona, Arizona Cancer Center, Tucson, AZ 85724, USA. cthomson@u.arizona.edu
authors.forename: Cynthia A
authors.initials: CA
authors.lastname: Thomson
authors.forename: Anna
authors.initials: A
authors.lastname: Giuliano
authors.forename: Cheryl L
authors.initials: CL
authors.lastname: Rock
authors.forename: Cheryl K
authors.initials: CK
authors.lastname: Ritenbaugh
authors.forename: Shirley W
authors.initials: SW
authors.lastname: Flatt
authors.forename: Susan
authors.initials: S
authors.lastname: Faerber
authors.forename: Vicky
authors.initials: V
authors.lastname: Newman
authors.forename: Bette
authors.initials: B
authors.lastname: Caan
authors.forename: Ellen
authors.initials: E
authors.lastname: Graver
authors.forename: Vern
authors.initials: V
authors.lastname: Hartz
authors.forename: Robin
authors.initials: R
authors.lastname: Whitacre
authors.forename: Felicia
authors.initials: F
authors.lastname: Parker
authors.forename: John P
authors.initials: JP
authors.lastname: Pierce
authors.forename: James R
authors.initials: JR
authors.lastname: Marshall
mesh_terms: D000328:Adult; D001943:Breast Neoplasms / Q000178:diet therapy; D015930:Diet Records; D004035:Diet Therapy; D005260:Female; D006801:Humans; D007407:Interviews as Topic; D011939:Mental Recall; D008875:Middle Aged; D015337:Multicenter Studies as Topic; D015596:Nutrition Assessment; D016032:Randomized Controlled Trials as Topic; D011795:Surveys and Questionnaires