BBH 440 Exam 2 Questions and
Answers 100% PASS
Morbidity - CORRECT ANSWER--the state of being diseased or unhealthy in a
population
-measured in ratios, proportions, and rates
Ratio - CORRECT ANSWER--comparison between 2 numbers (x & y)
-the values of x and y are independent such that the values of x are NOT
contained in y
-units for x & y can be same or diff.
-expressed: X:Y, X/Y, or X to Y
Example of Ratio - CORRECT ANSWER--In 2008 there were 36,030 suicides;
28,447 male and 7,583 female
-ratio of male to females is 28,447/7,5383
Example 2 of Ratio - CORRECT ANSWER--sick individuals to available hospital
beds
-automobile crash fatalities to miles driven
Proportion - CORRECT ANSWER--the values of X are contained in Y
,-usually expressed as percentage
-Ex: proportion of students in class that are male: 50/150= .33= 33%
Rates - CORRECT ANSWER--a frequency measure often used in epi studies
-it is a proportion with some reference to TIME
-Ex: 81/617= .13 cases per person PER YEAR
-.13 x 100= 13 cases per 100 people per year
Rate Base - CORRECT ANSWER--multiplier
-ex: rate base = 100
-.13 x 100 = 13 cases per 100 people per year
Point Prevalence Rate - CORRECT ANSWER--the TOTAL # of cases or
instances of a disease at a single point in time divided by the population AT RISK
of having the disease at the particular point in time.
-only getting people that have the disease right now
Formula for Point Prevalence Rate - CORRECT ANSWER--(Total # of cases at
single point in time/Population at risk at a single point in time) x 10^n
-10^n = rate base (may vary)
-denominator may have to be estimated
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED
, -point in time may be short
Period Prevalence Rate - CORRECT ANSWER--the TOTAL # of cases of a
disease during a specified period of time divided by the population AT RISK of
having the disease during that period
-accounts for people who have the disease currently, who have had the disease in
the past, and new cases during the period
Formula for Period Prevalence Rate - CORRECT ANSWER--(Total # of cases
during period of time/Population at risk during period) x 100^n
-
Uses of Prevalence Rate - CORRECT ANSWER--reflect the burden of the disease
on society
-used to estimate need for health care services, prevention activities, etc. for
different groups or locations
-can be used to help allocate funding and resources
-used to estimate risk of being diseased at a specific time or period
How Prevalence Rates INCREASE - CORRECT ANSWER--immigration of cases
(new cases moving in)
-emigration of healthy (healthy moving out)
Answers 100% PASS
Morbidity - CORRECT ANSWER--the state of being diseased or unhealthy in a
population
-measured in ratios, proportions, and rates
Ratio - CORRECT ANSWER--comparison between 2 numbers (x & y)
-the values of x and y are independent such that the values of x are NOT
contained in y
-units for x & y can be same or diff.
-expressed: X:Y, X/Y, or X to Y
Example of Ratio - CORRECT ANSWER--In 2008 there were 36,030 suicides;
28,447 male and 7,583 female
-ratio of male to females is 28,447/7,5383
Example 2 of Ratio - CORRECT ANSWER--sick individuals to available hospital
beds
-automobile crash fatalities to miles driven
Proportion - CORRECT ANSWER--the values of X are contained in Y
,-usually expressed as percentage
-Ex: proportion of students in class that are male: 50/150= .33= 33%
Rates - CORRECT ANSWER--a frequency measure often used in epi studies
-it is a proportion with some reference to TIME
-Ex: 81/617= .13 cases per person PER YEAR
-.13 x 100= 13 cases per 100 people per year
Rate Base - CORRECT ANSWER--multiplier
-ex: rate base = 100
-.13 x 100 = 13 cases per 100 people per year
Point Prevalence Rate - CORRECT ANSWER--the TOTAL # of cases or
instances of a disease at a single point in time divided by the population AT RISK
of having the disease at the particular point in time.
-only getting people that have the disease right now
Formula for Point Prevalence Rate - CORRECT ANSWER--(Total # of cases at
single point in time/Population at risk at a single point in time) x 10^n
-10^n = rate base (may vary)
-denominator may have to be estimated
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED
, -point in time may be short
Period Prevalence Rate - CORRECT ANSWER--the TOTAL # of cases of a
disease during a specified period of time divided by the population AT RISK of
having the disease during that period
-accounts for people who have the disease currently, who have had the disease in
the past, and new cases during the period
Formula for Period Prevalence Rate - CORRECT ANSWER--(Total # of cases
during period of time/Population at risk during period) x 100^n
-
Uses of Prevalence Rate - CORRECT ANSWER--reflect the burden of the disease
on society
-used to estimate need for health care services, prevention activities, etc. for
different groups or locations
-can be used to help allocate funding and resources
-used to estimate risk of being diseased at a specific time or period
How Prevalence Rates INCREASE - CORRECT ANSWER--immigration of cases
(new cases moving in)
-emigration of healthy (healthy moving out)
