EPID 309 Midterm
Random assignment of subjects to study groups helps to control for: - answer Biases
due to confounding
Your Public Health internship preceptor at Pima County Health Department asks you to
collect background data on cancer rates for the US. You start by going to: - answer
SEER
You don't have to worry about external validity in: - answer None of the above. You
have to worry about external validity in all study designs.
Use of a double blind study design can help reduce - answer information bias.
You would like to assess the effectiveness and efficiency in delivering health services
through your clinic. After selecting a 10% sample of all patient visits during the past six
months, you are able to characterize the patient population utilizing your clinic in terms
of age, sex, race, method of referral, diagnostic category, daily patient load, clinic staff
work schedules. This study is: - answerCross-sectional
The most important advantage of cohort studies is: - answerIt allows us to determine
both the relative risk and the attributable risk
In a clinical trial investigating at the efficacy of Mohs surgery to remove cancers the best
control would be: - answerA sample from the population of individuals receiving
standard care
Researchers hypothesize that older students are more effective learners. They
assemble groups of students from UA Gen Ed courses and collect demographic and
academic information. This kind of study is - answercross sectional
A research team is analyzing the association between leukemia and exposure to
benzene among factory workers. They use the population of Allentown PA for their
study, which has a population of 10,000 people. Out of this, a total of 1,000 factory
workers are recruited into the study (653 males and 347 females). In this sample, 13
individuals have leukemia. A total of 263 of the participants are exposed to benzene in
the workplace; 9 of them have leukemia. Using these data, - answerthey calculate an
Odds Ratio and conclude that there is a positive association where cases are more
likely to report exposure to benzene.
A group of 728 women from the UA campus were recruited to participate in a research
study to determine the risk of developing depression. At the beginning of the study, 38
women were diagnosed as depressed. Over the course of a year, an additional 23
, women were diagnosed with depression (3 in October, 15 in November and 5 in
December). Over the year, 3 deaths among these women were attributed to depression.
The likelihood that a UA woman will develop depression in a year is: - answer5%
Researchers interested in understanding the association between helmet use and injury
severity survey students on the UA campus with respect to bicycle safety and injury
sustained. The study design was: - answerCross-sectional study
A study of 39 cases of disease X were identified from a state registry and an equal
number of control subjects were then recruited from random-digit dial procedure. 5
cases had been exposed, compared to only 6 controls. How much more likely were
cases to report an exposure than controls? - answer0.81 times as likely
A study of 78 cases of disease X were identified from a state registry. A total of 120
control subjects were then recruited from random-digit dial procedure. 6 cases had been
exposed, compared to only 3 controls. How much more likely were cases to report an
exposure than controls? - answer3.25 times more likely
The systematic and continuous gathering of information about the occurrence of
diseases and other health phenomena is known as: - answerPublic health surveillance
The ecological fallacy is: - answerwhen you assume the results of population level
associations apply to individuals.
Cohort studies are preferred by epidemiologists because they are: - answerGood for
assessing incidence
Researchers interested in understanding the association between helmet use and injury
severity survey students on the UA campus with respect to bicycle safety and injury
sustained. The study design was: - answerCross-sectional
An endemic disease is one which - answeris habitually present in a community,
geographic area, or population group
______ have _____ values and may be represented by ___________. -
answerCategorical data, finite, contingency tables
When information about the study outcome is collected in the future, this is known as a -
answerprospective study
A study that follows women recruited from university health services for 15 years after
graduation to detect an association between tanning bed use and skin cancer rates: -
answerCohort Study
Researchers compare the prevalence of obesity and the average walk-ability scores of
Tucson and Phoenix. What type of study design did they use? - answerEcological
Random assignment of subjects to study groups helps to control for: - answer Biases
due to confounding
Your Public Health internship preceptor at Pima County Health Department asks you to
collect background data on cancer rates for the US. You start by going to: - answer
SEER
You don't have to worry about external validity in: - answer None of the above. You
have to worry about external validity in all study designs.
Use of a double blind study design can help reduce - answer information bias.
You would like to assess the effectiveness and efficiency in delivering health services
through your clinic. After selecting a 10% sample of all patient visits during the past six
months, you are able to characterize the patient population utilizing your clinic in terms
of age, sex, race, method of referral, diagnostic category, daily patient load, clinic staff
work schedules. This study is: - answerCross-sectional
The most important advantage of cohort studies is: - answerIt allows us to determine
both the relative risk and the attributable risk
In a clinical trial investigating at the efficacy of Mohs surgery to remove cancers the best
control would be: - answerA sample from the population of individuals receiving
standard care
Researchers hypothesize that older students are more effective learners. They
assemble groups of students from UA Gen Ed courses and collect demographic and
academic information. This kind of study is - answercross sectional
A research team is analyzing the association between leukemia and exposure to
benzene among factory workers. They use the population of Allentown PA for their
study, which has a population of 10,000 people. Out of this, a total of 1,000 factory
workers are recruited into the study (653 males and 347 females). In this sample, 13
individuals have leukemia. A total of 263 of the participants are exposed to benzene in
the workplace; 9 of them have leukemia. Using these data, - answerthey calculate an
Odds Ratio and conclude that there is a positive association where cases are more
likely to report exposure to benzene.
A group of 728 women from the UA campus were recruited to participate in a research
study to determine the risk of developing depression. At the beginning of the study, 38
women were diagnosed as depressed. Over the course of a year, an additional 23
, women were diagnosed with depression (3 in October, 15 in November and 5 in
December). Over the year, 3 deaths among these women were attributed to depression.
The likelihood that a UA woman will develop depression in a year is: - answer5%
Researchers interested in understanding the association between helmet use and injury
severity survey students on the UA campus with respect to bicycle safety and injury
sustained. The study design was: - answerCross-sectional study
A study of 39 cases of disease X were identified from a state registry and an equal
number of control subjects were then recruited from random-digit dial procedure. 5
cases had been exposed, compared to only 6 controls. How much more likely were
cases to report an exposure than controls? - answer0.81 times as likely
A study of 78 cases of disease X were identified from a state registry. A total of 120
control subjects were then recruited from random-digit dial procedure. 6 cases had been
exposed, compared to only 3 controls. How much more likely were cases to report an
exposure than controls? - answer3.25 times more likely
The systematic and continuous gathering of information about the occurrence of
diseases and other health phenomena is known as: - answerPublic health surveillance
The ecological fallacy is: - answerwhen you assume the results of population level
associations apply to individuals.
Cohort studies are preferred by epidemiologists because they are: - answerGood for
assessing incidence
Researchers interested in understanding the association between helmet use and injury
severity survey students on the UA campus with respect to bicycle safety and injury
sustained. The study design was: - answerCross-sectional
An endemic disease is one which - answeris habitually present in a community,
geographic area, or population group
______ have _____ values and may be represented by ___________. -
answerCategorical data, finite, contingency tables
When information about the study outcome is collected in the future, this is known as a -
answerprospective study
A study that follows women recruited from university health services for 15 years after
graduation to detect an association between tanning bed use and skin cancer rates: -
answerCohort Study
Researchers compare the prevalence of obesity and the average walk-ability scores of
Tucson and Phoenix. What type of study design did they use? - answerEcological
