An important aspect of a randomized, double-blind, placebo-controlled study is that subjects
A. must receive both treatment and placebo.
B. must be blinded as to whether they are in the treatment or placebo group.
C. must be assigned to the treatment or control group by the investigator.
D. must be aware of whether they are receiving the treatment or placebo.
Q. 2Where was the study published? is one of the questions that can be helpful in determining if a nutrition claim is hearsay or has a scientific basis. What type of publication is likely to be the most reliable source of nutrition information?
A. A local newspaper
B. A blog written by a food writer
C. A fitness publication
D. A peer-reviewed journal
Q. 3The gold standard study design for intervention studies is called
A. a random study.
B. a single-blind study.
C. a randomized, single-blind, uncontrolled study.
D. a randomized, double-blind, placebo-controlled study.
Q. 4If an investigator designs an intervention study with a control group, that group will receive a _____ instead of the study treatment.
A. panacea
B. placebo
C. half-dose
D. None of the above
Q. 5An investigator wanted to determine the effect of egg consumption on cholesterol levels. She asked subjects to consume 3 eggs per day for three weeks and tested their cholesterol levels before and after the 3 weeks. This type of study is an _____ study and should also include a _____ group.
A. epidemiologic, control
B. epidemiologic, blinded
C. intervention, random
D. intervention, control
Q. 6The relationship between the time children go to bed and the time the sun goes down is best described as
A. an intervention.
B. a cause-and-effect relationship.
C. a correlation.
D. an epidemiological relationship.
Q. 7If a slice of bread contains 15 grams of carbohydrates, 3 grams of protein, and 1 gram of lipids, how many calories does it provide?
A. 96
B. 76
C. 81
D. 171
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