EXAM ch. 3 & ch. 4 PHC 6001 questions
with 100% correct answers
similarity and difference between incidence Risk Ratio and incidence risk rate - correct answer ✔✔both
compare measures of disease frequency to assess effect
-ratio gives info on the strength of the relationship between an exposure and a disease
-risk rate describes the excess number of of cases associated with exposure
similarity and difference between risk difference and population risk difference - correct answer
✔✔both provide absolute effect of the exposure or the excess risk of disease
risk difference - number of cases of disease among the exposed that may be attributable to the exposure
-population RD - number of cases of disease in the total population that may be attributable to exposure
null value for incidence rate ratio is ____ - correct answer ✔✔1.0
null value for for incidence rate difference is ________ - correct answer ✔✔0.0
crude rate and age adjusted rate difference - correct answer ✔✔crude is the absolute value using raw
data
age adjusted is a summary rate used to compare disease frequency across populations with different age
distributions
T/F - when there is no association between an exposure and a disease, the numerical value of the risk
ratio will be zero - correct answer ✔✔F - it would be 1.0
T/F - when there is no association between an exposure and a disease, the numerical value of the risk
difference will be 1.0 - correct answer ✔✔F - it would be 0.0
T/F - a study examined the relationship between air pollution and the risk of having a baby with LBW. the
risk ratio comparing pregnant women exposed to high versus low levels of air pollution was 1.35. this
with 100% correct answers
similarity and difference between incidence Risk Ratio and incidence risk rate - correct answer ✔✔both
compare measures of disease frequency to assess effect
-ratio gives info on the strength of the relationship between an exposure and a disease
-risk rate describes the excess number of of cases associated with exposure
similarity and difference between risk difference and population risk difference - correct answer
✔✔both provide absolute effect of the exposure or the excess risk of disease
risk difference - number of cases of disease among the exposed that may be attributable to the exposure
-population RD - number of cases of disease in the total population that may be attributable to exposure
null value for incidence rate ratio is ____ - correct answer ✔✔1.0
null value for for incidence rate difference is ________ - correct answer ✔✔0.0
crude rate and age adjusted rate difference - correct answer ✔✔crude is the absolute value using raw
data
age adjusted is a summary rate used to compare disease frequency across populations with different age
distributions
T/F - when there is no association between an exposure and a disease, the numerical value of the risk
ratio will be zero - correct answer ✔✔F - it would be 1.0
T/F - when there is no association between an exposure and a disease, the numerical value of the risk
difference will be 1.0 - correct answer ✔✔F - it would be 0.0
T/F - a study examined the relationship between air pollution and the risk of having a baby with LBW. the
risk ratio comparing pregnant women exposed to high versus low levels of air pollution was 1.35. this
