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BBH 440 Exam 3 Questions And 100% Correct Answers
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BBH 440 Exam 3 Questions And 100% Correct AnswersA researcher conducts a survey in which it is asked, "Are you now suffering from
depression or have you ever experienced an episode of depression in your life?" The
rate that would be obtained if the researcher then calculated the total number of
individuals who have experienced depression (now and in the past) out of the total
group surveyed would be: - ANSWER period prevalence rate
State College has a population of 41,757 and 30,016 automobiles registered to members
of the population. There are thus 30,016 cars to 41,757 people or .72 cars per person.
This comparison is a: - ANSWER ratio
The prevalence rate refers to the total number of cases of a disease present within a
population regardless of the duration. For a given disease, the yearly number of new
cases has remained the same but a drugresistance strain of the bacteria that causes
this disease has resulted in large increases in the number of deaths caused by the
disease. Given these changes, the prevalence rate is most likely to: - ANSWER decrease
Following a chemical spill, a number of workers spent varying amounts of time working
at the spill site cleaning up. A researcher counts how many hours each spends working
there, then counts, after 6 months, how many new cases of respiratory illness have
developed in the workers out of the total number of hours working at the site (all
workers). This rate would be called a/an: - ANSWER incidence-density rate
A mortality rate is decreased after age-adjustment if the study population being
compared is _____ than the reference population. - ANSWER older
A study that compared breast cancer in women, cases vs. non-cases found that 75/100
cases did not use calcium supplements compared with 25/100 of the non-cases. What
would the equation to calculate the odds ratio be? HINT: I should set up a 2 x 2 table to
answer this. - ANSWER (25x25)/(75x75)
In the direct method of age adjustment, once a reference population has been selected,
, the next step is to: - ANSWER apply the age-specific rates in study population A to the
reference population
In an experiment, it is determined that the odds ratio for an exposure and disease is .48,
and it is significant. This means that: - ANSWER the exposure is associated with an
elevated risk of having the disease
If the RR of an important association is 0.83, what is the % change of this finding? -
ANSWER 17% decline
morbidity - ANSWER the condition of being unhealthy or diseased within a population
measures of morbidity - ANSWER ratio, proportion, rate
ratio - ANSWER comparison of 2 numbers (x and y) -- the values of x and y are
independent such that the values of x are NOT contained in y
expression of ratios - ANSWER x:y
x/y
x to y
can also be expressed as decimal (e.g. 0.72/1)
proportion - ANSWER the values of x are contained in y -- typically expressed as a
percentage
rate - ANSWER a frequency measure -- a proportion with some reference to time
prevalence rate - ANSWER the total number of cases or instances of a disease divided
by the population at risk of having the disease
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