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The design of a validation study must also reflect the purpose for which the dietary assessment is being carried out. Most dietary assessments measure current or recent consumption. However, if the aim is to estimate past diet related to the induction of cancer 10 years before the time of the assessment (e.g., in a case-control study), then the validation process should in theory address the relevant time period. In practice, this may be very difficult (i.e., if there is no robust reference measure of diet relating to the relevant time period). In such circumstances, the weaknesses of an unvalidated test measure should not be overlooked nor understated.

Keep Your Weight In Check During The Holidays

Keep Your Weight In Check During The Holidays

A time for giving and receiving, getting closer with the ones we love and marking the end of another year and all the eating also. We eat because the food is yummy and plentiful but we don't usually count calories at this time of year. This book will help you do just this.

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