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EPIB exam 2 practice questions with complete solutions
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EPIB exam 2 practice questions with complete solutions2x2 table ^^^ Correct Answer physically active: 500 have
prostate cancer, 4500 have no prostate cancer, 5000 total
not physically active: 1000 have prostate cancer, 4000 have no
prostate cancer, 5000 total
A case-control study of the risk of beer consumption and oral
cancer among men. In this study, cigarette smoking is associated
with beer consumption and is a risk factor for oral cancer among
both beer drinkers and nondrinkers. Is cigarette smoking a
confounder in this study? Correct Answer yes
A case-control study was designed to test the hypothesis that
sedentary lifestyle (i.e., no exercise) increases the risk of bone
fractures (the outcome) in elderly women. Of the 600 women
studied (200 cases and 400 controls), 128 were regular
exercisers (26 cases and 102 controls). Based on this
information, determine if sedentary lifestyle is a risk factor for
bone fractures in this group. Fill in the following table, and use
the information to complete questions 5-8. Correct Answer
sedentary lifestyle: 174 bone fractures, 298 no bone fractures,
total: 472
no sedentary lifestyle: 26 bone fractures, 102 no fractures, total:
128
total bone fractures: 200
total no bone fractures: 400
total: 600
,A cohort study of liver cancer among men with unhealthy
alcohol use. Incidence rates of liver cancer among men with
unhealthy alcohol use are compared to a group of men who are
non-drinkers. Is gender a confounder in this study? Correct
Answer no
A cross-sectional study allows measurement of the temporal
ordering of cause and effect. Correct Answer False
A group of researchers would like to examine rates of breast
cancer at the state level.
What study design can this be classified as? Correct Answer
Ecologic Study
A hospital identifies 100 patients that died of pancreatic cancer
in 2019, and 100 patients that survived pancreatic cancer in
2019. Researchers then consult medical records to investigate
whether patients received Drug A or Drug B.
What study design can this be classified as? Correct Answer
Case-Control Study
A random sample of middle-aged sedentary women was selected
from four census tracts, and each subject was examined for
evidence of osteoporosis. Those found to have the disease were
excluded. All others were randomly assigned to either an
exercise group, which followed a two-year program of
systematic exercise, or a control group, which had no exercise
program. Both groups were observed semiannually for incidence
of osteoporosis. Correct Answer Clinical trial
, A study must be valid before its results can be generalized.
Correct Answer true
A study of cancer was conducted among 10,000 men in the
United States who were 40-75 years of age. Every two years
questionnaires are sent to these individuals, and newly
diagnosed cases of various cancers were reported. The
investigators in this study were particularly interested in the
relationship between physical activity and the development of
prostate cancer over a 20 year period. 500 of the 5000 men who
were classified as physically active developed prostate cancer,
and 1000 of 5000 the men who were classified as not physically
active developed prostate cancer.
What is the study design? Correct Answer Prospective Cohort
Study
A study was undertaken to test the hypothesis that chewing
tobacco increases the risk of stomach cancer. Detailed historical
data on chewing tobacco use were collected from 400 subjects
with newly diagnosed stomach cancer and 400 subjects without
stomach cancer. The subjects without stomach cancer were
matched to those with cancer on background characteristics such
as age, race/ethnicity and gender. The results revealed that
chewing tobacco was not a significant risk factor for stomach
cancer. Correct Answer Case-Control Study
This is a case-control study because the participants were
selected and matched based on their outcome status. The cases
were those with stomach cancer and the controls were as similar
as possible to the cases on everything except the presence of the
outcome (i.e., no stomach cancer). After participants were
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