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Showing 2 results for Food Frequency Questionnaire

F Rezaeiian , B Rashidkhani , Hr Mirzaei , E Akbari , M Foroutan Ghaznavi , Zh Shadman , A Houshiar-Rad , Z Sanaat , S Pirouzpanah ,
Volume 6, Issue 4 (1-2012)
Abstract

Background and Objective: Dietary folate deficiency may contribute to tumorogenesis in many sorts of malignancies. By considering the increasing incidence rate of breast cancer in Iran, this study was conducted to investigate the association between dietary folate intake and breast cancer risk. Materials and Methods: In this case-control study, 177 patients with breast cancer and 169 control subjects with no family history of malignancy were recruited from hospitals affiliated to Shahid-Beheshti University of Medical Sciences, Tehran. Standard questionnaires were used to collect data on demographic characteristics, physical activity, and food frequency consumption for the previous year. Total daily energy and folate intakes were estimated using the Nutritionist IV software. Results: No statistically significant correlation was observed between daily dietary intake of folate and breast cancer risk in the sample population. However, the results showed a significant inverse association between daily intake of dietary folate and risk of breast cancer in postmenopausal women (OR=0.17 95%CI: 0.035-0.88). Increases in the strata of daily folate intakes were associated with decreasing trends of ORs in postmenopausal breast cancer risk (Pfor trend =0.036), where the OR of folate intake at the 2nd tertile was 0.26 (95%CI: 0.05-1.22) and at the 3rd tertile was 0.17 (95%CI: 0.035-0.88). Conclusion: Based on the findings, folate intake was not correlated with breast cancer risk in the total sample population, whereas higher intakes of folate was inversely associated with postmenopausal breast cancer risk. Keywords: Folate, Dietary intake, Breast cancer, Case-control, Food frequency questionnaire
F Hadi, Mh Somi, S Ghavamzadeh,
Volume 12, Issue 1 (4-2017)
Abstract

Background and Objectives: There is no food frequency questionnaire by which gluten consumption in patients with ulcerative colitis could be evaluated in Iran. The aim of this study was to assess the validity and reliability of a food frequency questionnaire to measure gluten consumption in ulcerative colitis. After designing the questionnaire, its validity and reliability were measured to be used in studies in this area.

Materials and Methods: The method used to assess validity was panel of experts. The designed questionnaires were sent to 10 experts in nutrition to get their opinion to the questions related to CVR and CVI. To evaluate the reliability, 3 questionnaires with one-month intervals were filled by the experts, and Cronbach's alpha coefficient was calculated. To ensure the ability to use it in the patients, the questionnaire's reliability were also assessed among a group of patients with ulcerative colitis.

Results: CVR coefficient calculated for the necessity of the questions was 0.695. CVI was calculated to measure the relevance of the questions to the objectives, and the content of 0.923 was obtained. Cronbach's alpha that measured in the panel of experts and among the patients was 0.761 and 0.786, respectively in the pilot study.

Conclusion: The present study showed that food frequency questionnaire designed to measure the consumption of gluten has good reliability and validity, and can be used particularly in patients with ulcerative colitis.

Keywords: Food frequency questionnaire, Ulcerative colitis, Gluten, Validity, Reliability authors

 



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Iranian Journal of  Nutrition Sciences and Food  Technology
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