epidemiology measures

Question 1

What is epidemiology?

Answer 1

study of disease occurrence in human populations

Question 2

incidence

Answer 2

(new cases of disease in a specific time period)/(number of people initially at risk)

Question 3

prevalence

Answer 3

(number of existing cases of a disease at a specified time)/(size of base population at that time)

Question 4

mortality rates

Answer 4

(number of people dying of a disease in a time period)/(average number of people alive during that period of time)

Question 5

Proportional mortality

Answer 5

(number of deaths due to a specific disease in a time period)/(total deaths during that time period)

Question 6

Case fatality

Answer 6

(number of people who die of a disease)/(total number of people with the disease)

Question 7

Risk ratio

Answer 7

(rate of disease among exposed)/(rate of disease among unexposed)

Question 8

Odds ratio

Answer 8

The ratio of having A and having B ?????

Question 9

Hazard ratio

Answer 9

???

Question 10

Attributable risk

Answer 10

rate of disease among the exposed - rate of disease among the unexposed

Question 11

Population attributable risk percent (preventable fraction)

Answer 11

[(rate of disease among pop) - (rate among unexposed)] / (rate of disease among pop)