A. The same for all diseases B. <1 year, 1 to 4 years, 5 to 9 years, 10 to 14 years, 15 to 19 years, and 20 years for co

[answerhappygod]

A.
The same for all diseases
B.
<1 year, 1 to 4 years, 5 to 9 years, 10 to 14 years, 15 to 19
years, and 20 years for communicable diseases, but not necessarily
for chronic diseases
C.
Appropriate for each condition and narrow enough to detect any
age-related patterns present in the data
D.
5-year age groups for all diseases unless the data suggest the
need for narrower categories to find a pattern or aberrancy
QUESTION 19
A.
They take less time and are less costly.
B.
They can utilize a more representative population.
C.
It is easier to obtain controls who are not exposed to the
suspected factor.
D.
They permit direct estimation of the risk of disease in those
exposed to the suspected factor.
E.
They can be done on a 'double blind' basis.
QUESTION 20
A.
Achieve comparability of cases and controls.
B.
Reduce the effects of sampling variation.
C.
Avoid observer bias and interviewee bias.
D.
Avoid observer bias and sampling variation.
E.
Avoid interviewee bias and sampling variation.
QUESTION 21
A.
Observational
B.
Cohort
C.
Case-control
QUESTION 22
A.
The investigator controls the subject's exposure in an
experimental study but not in an observational study.
B.
The investigator controls the subject's outcome in an
experimental study but not in an observational study.
C.
Experimental studies are conducted with animals and
observational studies are conducted with humans.
QUESTION 23
A.
Both prospective and retrospective studies.
B.
Prospective studies.
C.
Retrospective studies.
D.
3 points
QUESTION 24
A.
Both prospective and retrospective studies.
B.
Prospective studies.
C.
Retrospective studies.
D.