1988
DOI: 10.1093/oxfordjournals.aje.a115014
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Reproducibility and Validity of Dietary Assessment Instruments

Abstract: The reproducibility and validity of a food frequency questionnaire designed to measure intakes of total fat, saturated and polyunsaturated fats, vitamins A, C, and E, selenium, and dietary fiber were tested from March to October 1984 among 297 Finnish men aged 55-69 years. The questionnaire asked about consumption of 44 food items. In the reproducibility study, 107 subjects filled in the questionnaire three times, at three-month intervals. Intraclass correlations varied from 0.52 for vitamin A to 0.85 for poly… Show more

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Cited by 194 publications
(59 citation statements)
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“…This finding is similar to previous observations [16,19,32,33]. In many studies, classification in the same segment of the distribution using two different methods is found in 30% to 40% of subjects [16,32,34]. …”
Section: Discussionsupporting
confidence: 92%
“…This finding is similar to previous observations [16,19,32,33]. In many studies, classification in the same segment of the distribution using two different methods is found in 30% to 40% of subjects [16,32,34]. …”
Section: Discussionsupporting
confidence: 92%
“…Questions included, but were not limited to, smoking history, physical activity, diabetes status, and family history of cancer. A validated food frequency questionnaire that consisted of inquiries regarding portion size, and frequency of consumption of 276 foods and beverages in the past 12 months was used in order to estimate dietary intake(14). In addition to the questionnaires, a fasting serum sample was collected from participants on their first visit and stored at −70°C, height and weight were measured, and body mass index (BMI) calculated [(weight in kilograms)/(height in meters) 2 ](11).…”
Section: Methodsmentioning
confidence: 99%
“…Daily nutrient intakes were calculated using the food composition database from the National Public Health Institute in Finland. The food use questionnaire was developed specifically for use in the ATBC Study and was validated in a pilot study that collected 12 two-day food consumption records distributed evenly over a period of 6 months from 190 subjects; Pearson correlation coefficients (unadjusted) were 0.41, 0.64, 0.58, 0.47, and 0.62 for vitamin A, vitamin E, vitamin C, vegetables, and fruits, respectively 19. A total of 27,111 men (93% of the full cohort) successfully completed the dietary questionnaire.…”
Section: Methodsmentioning
confidence: 99%