Basic Definitions
The study of the distribution and determinants of disease.
What is Epidemiology?
This common study design is known for trying to create equivalent groups at baseline to eliminate the potential effects of confounding.
What is a randomized clinical trial (RCT)
This diet assessment tool is very prone to "reactivity".
What is a food record?
One objective way a self-reported measure of physical activity can be validated.
What are accelerometers? (Also correct: Direct observation, other electronic devices, doubly labeled water).
The study of how diet and nutrition influence the distribution and determinants of disease.
What is nutritional epidemiology?
This common study design can only be used to study rare diseases.
What is a case-control study?
This type of diet assessment tool allows for the 'element of surprise' if conducted over the telephone or Zoom.
What is a 24hr Diet Recall?
Researchers that may be interested in measuring physical activity might want to consider these 4 domains.
What is occupational, domestic, leisure, and transportation?
The degree to which repeated measurements of the same variable given the same value.
What is reliability?
This common study design is often called a "prevalence" study or "snap shot" study.
What is a cross-sectional study?
This diet assessment tool sacrifices precise intake on one or a few days in exchange for crude information relating to a longer period of time.
What is a Food Frequency Questionnaire?
This 27-item physical activity questionnaire covers all 4 domains, has been validated in individuals 15 and older, and was developed to be used in many countries.
What is the IPAQ?
The ability of an instrument to measure what it purports to measure.
What is validity?
This is the study design of the famous Harvard Nurses Health Study.
What is a cohort study?
This particular FFQ was specifically designed to build on cognitive theory and address commonly encountered FFQs problems in comprehension, order of food items, intake of seasonal foods, etc.
What is Subar and Thompson's Diet History Questionnaire?
What is the 2011 Ainsworth Compendium of Physical Activities?
You can calculate this type of RATE (commonly used in RCTs and cohort studies) if you divide the Incidence Rate in Your High Risk Group by the Incidence Rate in Your Low Risk Group.
What is a Relative Risk?
What is a cross-sectional study?
This diet assessment tool is prone to systematic error which can be mitigated with statistical modeling, but not entirely eliminated.
What is an FFQ?
This instrument has been used as an observational tool to measure physical activity in young children.
What is SOPLAY? (System for Observing Play and Leisure Activity in Youth)