Attainment of precision in implementation of 24h dietary recalls: INTERMAP UK

Robertson, Claire E.; Conway, Rana; Dennis, Barbara; Yarnell, John; Stamler, Jeremiah; Elliott, Paul

doi:10.1079/bjn20051543

Cited by 18 publications

(14 citation statements)

References 34 publications

(55 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…16 In a comparable analysis (model 1, milligrams per day adjusted for height, weight, and energy), we found similar BP differences: Ϫ2.8/Ϫ1.8 mm Hg per 2 SD of difference in phosphorus intake. Unlike these other studies, we used dietary data from 4 dietary recalls over 4 visits to increase precision 25,26 and assessed the potential confounding in depth.…”

Section: Discussionmentioning

confidence: 99%

“…36 We attempted to minimize bias by an extensive program for training dietary interviewers and coders and to improve precision by the inclusion of 4 dietary recalls. 26 We enhanced the 4 food tables to achieve state-of-the-art standardized calculation of nutrients in the different countries. 21,24 We adopted a careful model-building approach to deal with problems of high-order multicollinearity 37 among the minerals and with dietary vegetable protein.…”

Section: Discussionmentioning

confidence: 99%

“…To improve precision, measurements for each participant were averaged across visits. 25,26 Per the previous analysis plans, analyses were done for individuals, not across samples/countries. Analyses for dietary phosphorus were part of preplanned exploratory analyses of micronutrients to BP.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Dietary Phosphorus and Blood Pressure

et al. 2008

Self Cite

View full text Add to dashboard Cite

Abstract-Raised blood pressure is a leading cause of morbidity and mortality worldwide; improved nutritional approaches to population-wide prevention are required. Few data are available on dietary phosphorus and blood pressure and none are available on possible combined effects of phosphorus, magnesium, and calcium on blood pressure. The International Study of Macro-and Micro-Nutrients and Blood Pressure is a cross-sectional epidemiologic study of 4680 men and women ages 40 to 59 from 17 population samples in Japan, China, United Kingdom, and United States. Blood pressure was measured 8 times at 4 visits. Dietary intakes were obtained from four 24-hour recalls plus data on supplement use. Dietary phosphorus was inversely associated with blood pressure in a series of predefined multiple regression models, with the successive addition of potential confounders, both nondietary and dietary. Estimated blood pressure differences per 232 mg/1000 kcal (2 SD) of higher dietary phosphorus were Ϫ1.1 to Ϫ2.3 mm Hg systolic/Ϫ0.6 to Ϫ1.5 mm Hg diastolic (nϭ4680) and Ϫ1.6 to Ϫ3.5 mm Hg systolic/Ϫ0.8 to Ϫ1.8 mm Hg diastolic for 2238 "nonintervened" individuals, ie, those without special diet/nutritional supplements or diagnosis/treatment for cardiovascular disease or diabetes. Dietary calcium and magnesium, correlated with phosphorus (partial rϭ0.71 and rϭ0.68), were inversely associated with blood pressure. Blood pressures were lower by 1.9 to 4.2 mm Hg systolic/1.2 to 2.4 mm Hg diastolic for people with intakes above versus below country-specific medians for all 3 of the minerals. These results indicate the potential for increased phosphorus/mineral intake to lower blood pressure as part of the recommendations for healthier eating patterns for the prevention and control of prehypertension and hypertension. (Hypertension. 2008;51:669-675.)Key Words: blood pressure Ⅲ dietary phosphorus Ⅲ calcium Ⅲ magnesium Ⅲ population study Ⅲ primary prevention R aised blood pressure (BP) commonly affects middle-and older-aged adults and is a major contributor to the high rates of coronary heart disease and stroke worldwide. 1 Data from epidemiological studies 2,3 ; randomized, controlled trials 4 -13 ; and studies of migrants 14,15 show the importance of dietary factors in the primary prevention and control of high BP. Mineral intakes are important, especially sodium and potassium, 2-9 possibly also calcium and magnesium, 10 -13 but little attention has been paid to the possible effects of phosphorus intake on BP, 16 -18 despite its role in cellular structure and function, 19 calcium turnover, and regulation. 20 We report here multivariate data from the International Study of Macroand Micro-Nutrients and Blood Pressure (INTERMAP Study) on the independent relationship of dietary phosphorus to BP and on estimated combined influences of higher versus lower intakes of phosphorus, calcium, and magnesium. MethodsThe INTERMAP Study includes men and women ages 40 to 59 years, from 17 diverse population samples in Japan (4 samples), People's Republi...

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Dietary Phosphorus and Blood Pressure

et al. 2008

Self Cite

View full text Add to dashboard Cite

show abstract

“…For completeness of information, open-ended questioning techniques and neutral probing methods were used as applied in the INTERMAP study (18) . When foods were not consumed in household measures, subjects referred to a picture book comprising coloured photographs of foods in different portion sizes.…”

Section: H Dietary Recallmentioning

confidence: 99%

A new FFQ designed to measure the intake of fatty acids and antioxidants in children

Stiegler

Sausenthaler

Buyken

et al. 2009

Public Health Nutr.

Self Cite

View full text Add to dashboard Cite

Objective: The present paper describes the systematic development of an FFQ to assess the intake of fatty acids and antioxidants in school-aged children. In addition, a validation study applying 24 h dietary recalls was performed. Design: Using the variance-based Max_r method, a list of eighty-two foods was compiled from data obtained by 3 d weighed dietary records. The foods were used to design an FFQ, the comprehensibility of which was evaluated in a feasibility study. In addition, the FFQ was validated in a subset of 101 children from the German Infant Nutritional Intervention Study (GINI PLUS) against one 24 h dietary recall. Results: The feasibility study attested a good acceptance of the FFQ. Mean intake of foods compared well between the FFQ and the 24 h dietary recall, although intake data generated from the FFQ tended to be higher. This difference became less apparent at the nutrient level, although the estimated average consumption of arachidonic acid and EPA using the FFQ still exceeded values recorded with the 24 h recall method by 45 % and 29 %, respectively. Conclusions: On the basis of the systematic selection process of the food list, the established practicability of the FFQ and the overall plausibility of the results, the use of this FFQ is justified in future epidemiological studies.

show abstract

“…Historically, the aim in addressing random error in dietary intake methodologies has been to improve the precision and accuracy of the instruments (Black et al, 1983;Bingham, 1991Bingham, , 1987Block and Hartman, 1989;Mertz, 1992;Robertson et al, 2005). Although similar methods produce similar results with respect to precision (Bellisle, 1999), accuracy should still be improved (Mertz, 1992).…”

Section: Introductionmentioning

confidence: 99%

Minimizing random error in dietary intakes assessed by 24-h recall, in overweight and obese adults

et al. 2007

View full text Add to dashboard Cite

Objective: To determine the minimum number of days of dietary intake interviews required to reduce the effects of random error (day-to-day variability in dietary intake) when using the multiple-pass, multiple-day, 24-h recall method. Design: Cross-sectional study. Setting: University research department. Subjects: A total of 50 healthy non-smoking overweight and obese (body mass index ¼ 26-40 kg/m 2 ) adult men and women aged 39-45 years completed the study. Participants were randomly selected from volunteers for a larger unrelated study. Interventions: Each participant completed 10, multiple-pass, 24-h recall interviews on randomly chosen days over 4 weeks. The minimum number of record days was determined for each macronutrient (carbohydrate, fat, protein) and energy, for each gender, to obtain a 'true' (unobservable) representative intake from reported (observed) dietary intakes. Results: The greatest number of days required to obtain a 'true' representative intake was 8 days. Carbohydrate intakes required the greatest number of days of dietary record among males (7 days), whereas protein required the greatest number of days among females (8 days) in this cohort. Sunday was the day of the week that showed greatest variability in macronutrient intakes. Protein (Po0.05) and fat (Po0.001) intakes were significantly more variable than carbohydrate on Sundays compared with weekdays, for both men and women. Conclusion: A logistically achievable 8 days of dietary intake interviews was sufficient to minimize the effect of random error when using the multiple-pass, 24-h recall dietary intake method. Sunday should be included among the dietary interview days to ensure a 'true' representation of macronutrient intakes. This method can be confidently applied to small cohort studies in which dietary intakes from different groups are to be compared or to investigations of associations between nutrient intakes and disease.

show abstract

Attainment of precision in implementation of 24h dietary recalls: INTERMAP UK

Cited by 18 publications

References 34 publications

Dietary Phosphorus and Blood Pressure

Dietary Phosphorus and Blood Pressure

A new FFQ designed to measure the intake of fatty acids and antioxidants in children

Minimizing random error in dietary intakes assessed by 24-h recall, in overweight and obese adults

Contact Info

Product

Resources

About