title: Validity and reproducibility of a revised semi-quantitative food frequency questionnaire (SQFFQ) for women of age-group 12-44 years in Chengdu.
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.
authors.affiliation: Department of Ultrasonography, West China Women's and Children's Hospital of Sichuan University, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Tang
authors.affiliation: Department of Obstetrics and Gynecology, West China Women's and Children's Hospital of Sichuan University, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of Obstetrics and Gynecology, West China Women's and Children's Hospital of Sichuan University, China.
authors.forename: Liangzhi
authors.initials: L
authors.lastname: Xu
authors.affiliation: Department of Obstetrics and Gynecology, West China Women's and Children's Hospital of Sichuan University, China.
authors.forename: Yujian
authors.initials: Y
authors.lastname: Jia
authors.affiliation: Department of Obstetrics and Gynecology, West China Women's and Children's Hospital of Sichuan University, China.
authors.forename: Dan
authors.initials: D
authors.lastname: Shan
authors.affiliation: Department of Obstetrics and Gynecology, West China Women's and Children's Hospital of Sichuan University, China.
authors.forename: Wenjuan
authors.initials: W
authors.lastname: Li
authors.affiliation: Mother and Baby Center, School of Medicine and Public Health, University of Newcastle, Australia.
authors.forename: Xin
authors.initials: X
authors.lastname: Pan
authors.affiliation: Department of Evidence-based Medicine and Clinical Epidemiology, West China Hospital, Sichuan University, China.
authors.forename: Deying
authors.initials: D
authors.lastname: Kang
authors.affiliation: Department of Nutrition and Food Safety, Sichuan University, China.
authors.forename: Chengyu
authors.initials: C
authors.lastname: Huang
authors.affiliation: West China School of Public Health, Sichuan University, China.
authors.forename: Xiaosong
authors.initials: X
authors.lastname: Li
authors.affiliation: Department of Ultrasonography, West China Women's and Children's Hospital of Sichuan University, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Department of Obstetrics and Gynecology, West China Women's and Children's Hospital of Sichuan University, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Hu
authors.affiliation: Department of Ultrasonography, West China Women's and Children's Hospital of Sichuan University, China.
authors.forename: Lingli
authors.initials: L
authors.lastname: Konglin
authors.affiliation: Department of Ultrasonography, West China Women's and Children's Hospital of Sichuan University, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhuang
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002681:China; D003430:Cross-Sectional Studies; D004034:Diet Surveys; D002149:Energy Intake; D005247:Feeding Behavior; D005260:Female; D006801:Humans; D015203:Reproducibility of Results; D012737:Sex Factors; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires; D055815:Young Adult
keywords: China; Female; Nutrition assessment; Reliability; Semi-quantitative food frequency questionnaire; Validity