The American Cancer Society Cancer Prevention Study-3 FFQ Has Reasonable Validity and Reproducibility for Food Groups and a Diet Quality Score.
J Nutr
; 150(6): 1566-1578, 2020 06 01.
Article
em En
| MEDLINE
| ID: mdl-32232407
ABSTRACT
BACKGROUND:
FFQs are commonly used to assess dietary intake and it is important to evaluate their performance in the target population.OBJECTIVE:
We evaluated the reproducibility and relative validity of the Cancer Prevention Study-3 (CPS-3) FFQ in estimating usual intake of 63 food groups and diet quality in accordance with the American Cancer Society dietary guidelines for cancer prevention.METHODS:
A subset of participants from the CPS-3 (433 women, 244 men), 31-70 y of age, were included in a cross-sectional diet assessment substudy (2015-2016). Reproducibility was assessed by comparing estimates from repeat FFQs, approximately 1 y apart, using Spearman correlation coefficient (rs) and Pearson correlation coefficient (rp) correlations for food groups and diet quality, respectively. Validity was assessed similarly by comparing FFQ estimates with estimates from ≤6 interviewer-administered 24-h dietary recall (24HR). Analyses were stratified by sex and race/ethnicity.RESULTS:
Reproducibility correlations for repeated FFQs were > 0.50 for 83-97% of food groups analyzed across strata of sex and race. Although participants tended to overreport plant foods (e.g., fruits and legumes) and underreport refined grains and sugar-sweetened beverages, the median energy-adjusted, deattenuated Spearman correlations comparing the second FFQ to the 24HR were 0.50 and 0.52 among men and women (range 0.05-0.82), respectively, suggesting that ranking was preserved for most food groups. Validity was highest for coffee, alcohol, and total dairy, and lowest for pasta and regular-fat yogurt. Median validity across food groups varied by race/ethnicity and was highest among whites (rs = 0.54) followed by Hispanics (rs = 0.49) and African Americans (rs = 0.45). The diet quality score had good validity in all subgroups examined, but was higher among men (rp = 0.69) than women (rp = 0.61), and lower among whites (rp = 0.62) than Hispanics (rp = 0.64) or African Americans (rp = 0.73).CONCLUSIONS:
This study indicates good reproducibility and validity of the CPS-3 FFQ for most major food groups and the diet quality score in all sex and race/ethnicity groups examined.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Contexto em Saúde:
1_ASSA2030
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2_ODS3
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8_ODS3_consumo_sustancias_psicoactivas
Base de dados:
MEDLINE
Assunto principal:
Dieta
/
Alimentos
/
Neoplasias
Tipo de estudo:
Qualitative_research
Limite:
Adult
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Female
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Humans
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Male
Idioma:
En
Revista:
J Nutr
Ano de publicação:
2020
Tipo de documento:
Article