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J Health Popul Nutr. 2015 Mar;33(1):50-9.

Validity and reproducibility of a revised semi-quantitative food frequency questionnaire (SQFFQ) for women of age-group 12-44 years in Chengdu.

Author information

1
Department of Ultrasonography, West China Women's and Children's Hospital of Sichuan University, China.
2
Department of Obstetrics and Gynecology, West China Women's and Children's Hospital of Sichuan University, China.
3
Mother and Baby Center, School of Medicine and Public Health, University of Newcastle, Australia.
4
Department of Evidence-based Medicine and Clinical Epidemiology, West China Hospital, Sichuan University, China.
5
Department of Nutrition and Food Safety, Sichuan University, China.
6
West China School of Public Health, Sichuan University, China.

Abstract

To find a credible nutritional screening tool for evaluating relationship between nutritional status and diseases in Chengdu female residents, the reliability and validity of a revised semi-quantitative food frequency questionnaire (SQFFQ) were tested. The validity was assessed by comparing the SQFFQ with the 'standard' method of 3 days' dietary recall, and the reliability was assessed by comparing the first SQFFQ with the second SQFFQ at 4 weeks interval. Correlation analysis showed that, for reliability, the average correlation coefficient (CC) of 22 kinds of nutrients was 0.66 and reduced to 0.60 after adjusting for energy; the average of intra-class correlation coefficients (ICC) was 0.65. For validity, the average CC was 0.35 and remained stable after adjusting for CC of energy or nutrients. Validity of 17 nutrients in SQFFQ survey had correlation with result of 3 days' dietary recall. The results showed that the revised SQFFQ can be used for investigating the role of nutrients in development of disease in Chengdu female residents.

KEYWORDS:

China; Female; Nutrition assessment; Reliability; Semi-quantitative food frequency questionnaire; Validity

PMID:
25995721
PMCID:
PMC4438648
[Indexed for MEDLINE]
Free PMC Article

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