Measuring dietary change in a diet intervention trial: comparing food frequency questionnaire and dietary recalls.
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.
Thomson
Cynthia A
CA
University of Arizona, Arizona Cancer Center, Tucson, AZ 85724, USA. cthomson@u.arizona.edu
Giuliano
Anna
A
Rock
Cheryl L
CL
Ritenbaugh
Cheryl K
CK
Flatt
Shirley W
SW
Faerber
Susan
S
Newman
Vicky
V
Caan
Bette
B
Graver
Ellen
E
Hartz
Vern
V
Whitacre
Robin
R
Parker
Felicia
F
Pierce
John P
JP
Marshall
James R
JR
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