The chance of rain, shown on a weather app, is given as a percentage. This is a relative frequency, based on real data. The chance of rain, shown on a weather app, is given as a percentage. This is a ...
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 ...
Objective: To assess the relative validity of a semi-quantitative food frequency questionnaire (SQFFQ) against 28 day weighed diet records (WDRs). Subjects and methods: The SQFFQ was administered to ...
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