A comprehensive FFQ developed for use in New Zealand adults: reliability and validity for nutrient intakes

Public Health Nutrition

Paula ML Skidmore¹  Cecilia HY Sam¹  Sheila Skeaff¹ 

关键词: FFQ;    Reliability;    Relative validity;   

DOI  :  10.1017/S1368980012005058

学科分类：卫生学

来源: Cambridge University Press

【 摘 要 】

AbstractObjectiveTo evaluate the reliability and relative validity of a semi-quantitative FFQ for assessing the habitual intake of multiple nutrients in New Zealand (NZ) adults over the past 12 months.DesignA 154-item FFQ was developed. After initial pre-testing, reliability was assessed using intra-class correlations. Relative validity was assessed by comparing nutrient intakes derived from the FFQ v. those from an 8 d diet record (8dWDR) collected over 12 months and selected blood biomarkers, using Spearman correlations. Supplementary cross-classification and Bland–Altman analyses were performed to assess validity of the FFQ v. the 8dWDR.SettingDunedin, NZ.SubjectsOne hundred and thirty-two males and females aged 30–59 years who completed all FFQ and 8dWDR and provided a blood sample.ResultsReliability coefficients ranged from 0·47 for Ca to 0·83 for alcohol, with most values falling between 0·60 and 0·80. The highest validity coefficients for energy-adjusted data were observed for alcohol (0·74), cholesterol (0·65) and β-carotene (0·58), and the lowest for Zn (0·24) and Ca (0·28). For all energy-adjusted nutrients mean percentage correct classification was 77·9 % and gross misclassification was 4·5 %. Results of Bland–Altman analyses showed wide limits of agreement for all micronutrients but high agreement was observed for most macronutrients (99 % for protein, 103 % for total fat). When compared with biomarkers, energy-adjusted coefficients were 0·34 for β-carotene and 0·33 for vitamin C.ConclusionsThe FFQ provides highly repeatable measurements and good validity in ranking individuals’ intake, suggesting that it will be a useful tool to assess nutrient intake of NZ adults in future research.

【 授权许可】

Unknown