TY - JOUR
T1 - Reproducibility and relative validity of a food frequency questionnaire to estimate intake of dietary phylloquinone and menaquinones
AU - Zwakenberg, S R
AU - Engelen, Anouk I P
AU - Dalmeijer, G W
AU - Booth, S.L.
AU - Vermeer, C.
AU - Drijvers, J J M M
AU - Ocke, Marga C.
AU - Feskens, Edith J. M.
AU - van der Schouw, Y T
AU - Beulens, J W J
N1 - Publisher Copyright:
© 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.
PY - 2017/12/1
Y1 - 2017/12/1
N2 - Background/Objectives:This study aims to investigate the reproducibility and relative validity of the Dutch food frequency questionnaire (FFQ), to estimate intake of dietary phylloquinone and menaquinones compared with 24-h dietary recalls (24HDRs) and plasma markers of vitamin K status.Subjects/Methods:In a cross-sectional study among 63 men and 58 women, the FFQ was completed three times over a 1-year period and the reproducibility was calculated over these measurements. Twelve-monthly 24HDR were collected to estimate relative validity. In addition, the relative validity of the FFQ, compared with plasma phylloquinone and desphospho-uncarboxylated matrix Gla protein (dpucMGP), was assessed cross-sectionally among 507 postmenopausal women.Results:Intraclass correlations showed a good reproducibility, with correlations ranging from 0.65 to 0.83. The relative validity for phylloquinone intake compared with 24HDR was lower for women (r s =0.28) than men (r s =0.40). The relative validity, compared with 24HDR, for intake of short-chain menaquinones were ranging between 0.30 and 0.34. Long-chain menaquinones showed good relative validity (r s =0.60-0.69). Plasma phylloquinone concentrations were weakly correlated with phylloquinone intake (r s =0.16 (0.07-0.24). Plasma dpucMGP was negatively but weakly correlated with phylloquinone intake (r s =-0.09 (-0.18; -0.01)) and long-chain menaquinones (r s =-0.13 (-0.21; -0.04)), but not with short-chain menaquinones (r s =-0.04 (-0.13; 0.05)).Conclusions:The FFQ is reproducible to rank subjects for phylloquinone and menaquinone intake.The relative validity of our FFQ, compared with 24HDR, to estimate intake of phylloquinone and short-chain menaquinones was low, but the relative validity for long-chain menaquinones was good. The relative validity of our FFQ, compared with plasma phylloquinone and dpucMGP, was relatively low for both phylloquinone and menaquinone intake.
AB - Background/Objectives:This study aims to investigate the reproducibility and relative validity of the Dutch food frequency questionnaire (FFQ), to estimate intake of dietary phylloquinone and menaquinones compared with 24-h dietary recalls (24HDRs) and plasma markers of vitamin K status.Subjects/Methods:In a cross-sectional study among 63 men and 58 women, the FFQ was completed three times over a 1-year period and the reproducibility was calculated over these measurements. Twelve-monthly 24HDR were collected to estimate relative validity. In addition, the relative validity of the FFQ, compared with plasma phylloquinone and desphospho-uncarboxylated matrix Gla protein (dpucMGP), was assessed cross-sectionally among 507 postmenopausal women.Results:Intraclass correlations showed a good reproducibility, with correlations ranging from 0.65 to 0.83. The relative validity for phylloquinone intake compared with 24HDR was lower for women (r s =0.28) than men (r s =0.40). The relative validity, compared with 24HDR, for intake of short-chain menaquinones were ranging between 0.30 and 0.34. Long-chain menaquinones showed good relative validity (r s =0.60-0.69). Plasma phylloquinone concentrations were weakly correlated with phylloquinone intake (r s =0.16 (0.07-0.24). Plasma dpucMGP was negatively but weakly correlated with phylloquinone intake (r s =-0.09 (-0.18; -0.01)) and long-chain menaquinones (r s =-0.13 (-0.21; -0.04)), but not with short-chain menaquinones (r s =-0.04 (-0.13; 0.05)).Conclusions:The FFQ is reproducible to rank subjects for phylloquinone and menaquinone intake.The relative validity of our FFQ, compared with 24HDR, to estimate intake of phylloquinone and short-chain menaquinones was low, but the relative validity for long-chain menaquinones was good. The relative validity of our FFQ, compared with plasma phylloquinone and dpucMGP, was relatively low for both phylloquinone and menaquinone intake.
UR - http://www.scopus.com/inward/record.url?scp=85042691363&partnerID=8YFLogxK
U2 - 10.1038/ejcn.2017.121
DO - 10.1038/ejcn.2017.121
M3 - Article
C2 - 28812579
SN - 0954-3007
VL - 71
SP - 1423
EP - 1428
JO - European Journal of Clinical Nutrition
JF - European Journal of Clinical Nutrition
IS - 12
ER -