COMPREHENSIVE QUESTIONS
ANSWERS VERIFIED A+
◉ Case-control study .
Answer:Retrospective design that tries to compare differences and risk
factors for developing a disease/outcome
◉ Case-cohort study .
Answer:Can either be retrospective or prospective. Describes an
observational evaluation to identify a specific outcome over a set period
of time.
◉ Incidence .
Answer:Occurrence of a disease during a set period
◉ Prevalence .
Answer:Occurrence of a disease at a fixed point in time.
◉ Selection bias .
Answer:Selection of subjects leads to an imbalance or advantage of one
cohort over another
◉ Observation Bias .
, Answer:Research staff has bias due to knowing the outcomes of the
study
◉ Recall bias .
Answer:Occurs when study participants are asked to recall a past event
◉ Misclassification bias .
Answer:Inappropriate categorization
◉ Confounding variables .
Answer:Influence the independent and dependent variables that alter
how the results can be interpreted.
◉ Type 1 error .
Answer:Rejection of the null hypothesis when it was actually correct
(found a difference even though it did not existed). False positive. Also
known as alpha error.
◉ Type II error .
Answer:Acceptance of the null hypothesis when it was actually incorrect
(stated that there was no difference when there wasn't one). False
negative. Also known as beta error.
◉ Types of statistical tests for continuous data .
Answer:T-tests