Epidemiology 4

Question 1

what is cause

Answer 1

external agent which results in disease in susceptible individuals

Question 2

what is a confounding variable

Answer 2

type of extraneous variable which has been left uncontrolled

Question 3

what are the 3 common indices of risk

Answer 3

absolute
relative
attributable

Question 4

what is absolute risk

Answer 4

incidence rate of disease amongst people exposed to agent

Question 5

what is attributable risk

Answer 5

difference between incidence rates in exposed and non-exposed groups

Question 6

what is relative risk

Answer 6

ratio of incidence rate in exposed group to incidence rate in non-exposed group

Question 7

what do analytic observational studies test

Answer 7

specific hypotheses
define risk factors of disease more precisely

Question 8

what are the 2 types of study used for analytic observational studies

Answer 8

cohort
case control

Question 9

what do cohort studies do

Answer 9

recruit group of people who have not manifested disease at time of recruitment and assess risk factors
measures frequency of disease occurrence among people exposed and not exposed to risk factor over time

Question 10

what do case control studies do

Answer 10

compare individuals with disease with those without disease
trace back to assess risk factors