Forskning
Udskriv Udskriv
Switch language
Region Hovedstaden - en del af Københavns Universitetshospital
Udgivet

Missing portion sizes in FFQ - alternatives to use of standard portions

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

DOI

  1. Changes in job strain and subsequent weight gain: a longitudinal study, based on the Danish Nurse Cohort

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

  2. Exposure to vitamin D from fortified margarine during fetal life and later risk of pre-eclampsia: the D-tect Study

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

  3. Effects of the Healthy Start randomized intervention on dietary intake among obesity-prone normal-weight children

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

  4. Calcium, vitamin D, casein and whey protein intakes and periodontitis among Danish adults

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

  1. Familial associations in hair cortisol concentration: A cross-sectional analysis based on the Healthy Start study

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

  2. Vitamin D and Calcium Milk Fortification in Pregnant Women with Periodontitis: A Feasibility Trial

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

  3. Prediction of carotid intima-media thickness and its relation to cardiovascular events in persons with type 2 diabetes

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Vis graf over relationer

OBJECTIVE: Standard portions or substitution of missing portion sizes with medians may generate bias when quantifying the dietary intake from FFQ. The present study compared four different methods to include portion sizes in FFQ.

DESIGN: We evaluated three stochastic methods for imputation of portion sizes based on information about anthropometry, sex, physical activity and age. Energy intakes computed with standard portion sizes, defined as sex-specific medians (median), or with portion sizes estimated with multinomial logistic regression (MLR), 'comparable categories' (Coca) or k-nearest neighbours (KNN) were compared with a reference based on self-reported portion sizes (quantified by a photographic food atlas embedded in the FFQ).

SETTING: The Danish Health Examination Survey 2007-2008.

SUBJECTS: The study included 3728 adults with complete portion size data.

RESULTS: Compared with the reference, the root-mean-square errors of the mean daily total energy intake (in kJ) computed with portion sizes estimated by the four methods were (men; women): median (1118; 1061), MLR (1060; 1051), Coca (1230; 1146), KNN (1281; 1181). The equivalent biases (mean error) were (in kJ): median (579; 469), MLR (248; 178), Coca (234; 188), KNN (-340; 218).

CONCLUSIONS: The methods MLR and Coca provided the best agreement with the reference. The stochastic methods allowed for estimation of meaningful portion sizes by conditioning on information about physiology and they were suitable for multiple imputation. We propose to use MLR or Coca to substitute missing portion size values or when portion sizes needs to be included in FFQ without portion size data.

OriginalsprogEngelsk
TidsskriftPublic Health Nutrition
Vol/bind18
Udgave nummer11
Sider (fra-til)1914-21
Antal sider8
ISSN1368-9800
DOI
StatusUdgivet - aug. 2015

ID: 45477163