© 1992 Oxford University Press
other |
Effects of Different Designs and Extension of a Food Frequency Questionnaire on Response Rate, Completeness of Data and Food Frequency Responses
*Cancer Epidemiology Unit, University Hospital S-751 85 Uppsala, Sweden
**Department of Statistics, Uppsala University Sweden
The National Food Administration Uppsala, Sweden
Department of Surgery, University Hospital Uppsala, Sweden
The authors studied how the introduction of several modifications to a basic food frequency questionnaire can in fluence the results of dietary surveys. Modifications covered eight combinations based on three levels: increasing versus decreasing order of frequency categories; questionnaires without versus with questions about portion sizes, and questionnaires without versus with extra non-dietary questions. The sample included 6783 women between the ages of 40 and 70 years who took part in mammography screening. The women were randomly assigned to one of the eight study groups. All of the women in each group received one of the eight differently modified questionnaires. The forms extended in length by extra non-dietary questions and portion size categories resulted in a 20% higher total non-response compared to the shorter basic form. Partial non-response was significantly lower for all four questionnaire types that included portion sizes. When portion sizes were included in the questionnaire, the reported mean frequency of consumption was significantly reduced for fat (–10 times per month), milk (–6), bread (–5), vegetables (–2) and fish (–0.4). The decreasing order of response to the frequency categories was associated with a statistically significant in crease in the frequency responses for bread (2.6 times per month), vegetables (2) and fish (0.6). These data provide evidence that the design and extension of food frequency questionnaires influence the results of dietary studies.
Revised 1 June 1992
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  C. E. O'Neil and T. A. Nicklas A Review of the Relationship Between 100% Fruit Juice Consumption and Weight in Children and Adolescents American Journal of Lifestyle Medicine, July 1, 2008; 2(4): 315 - 354. [Abstract] [PDF]
|
|
|
|
 |
|
 M. L. Molag, J. H. M. de Vries, M. C. Ocke, P. C. Dagnelie, P. A. van den Brandt, M. C. J. F. Jansen, W. A. van Staveren, and P. van't Veer Design Characteristics of Food Frequency Questionnaires in Relation to Their Validity Am. J. Epidemiol., December 15, 2007; 166(12): 1468 - 1478. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 U. Noethlings, K. Hoffmann, M. M. Bergmann, and H. Boeing Portion Size Adds Limited Information on Variance in Food Intake of Participants in the EPIC-Potsdam Study J. Nutr., February 1, 2003; 133(2): 510 - 515. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. F. Subar, R. G. Ziegler, F. E. Thompson, C. C. Johnson, J. L. Weissfeld, D. Reding, K. H. Kavounis, R. B. Hayes, and for the Prostate, Lung, Colorectal, and Ovarian Ca Is Shorter Always Better? Relative Importance of Questionnaire Length and Cognitive Ease on Response Rates and Data Quality for Two Dietary Questionnaires Am. J. Epidemiol., February 15, 2001; 153(4): 404 - 409. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. F. Subar, D. Midthune, M. Kulldorff, C. C. Brown, F. E. Thompson, V. Kipnis, and A. Schatzkin Evaluation of Alternative Approaches to Assign Nutrient Values to Food Groups in Food Frequency Questionnaires Am. J. Epidemiol., August 1, 2000; 152(3): 279 - 286. [Abstract] [Full Text] [PDF]
|
|