Epidemiology Chapter 3: Measures of
Morbidity and Mortality 2024/2025 Exam
Questions and Detailed Answers | Get it
100% Correct Answers
Four categories of epidemiology measures - 🧠ANSWER ✔✔1. Counts
2. Ratios
3. Proportions
4. Rates
count - 🧠ANSWER ✔✔the number of cases of a disease or other health
phenomenon being studied
ratio - 🧠ANSWER ✔✔the value obtained by dividing one quantity by another
Ex: simple sex ratio (M to F cases), demographic sex ratio (M per 100 F), sex
ratio at birth (M births/F births * 1000)
proportion - 🧠ANSWER ✔✔type of ratio where the numerator is part of the
denominator, expressed as a percent to illustrate magnitude of a problem
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, Rate - 🧠ANSWER ✔✔type of ratio (not proportion) where the denominator
includes a measure of time and the unit size of the population and the
numerator is the frequency of disease over the time period
Prevalence - 🧠ANSWER ✔✔number of existing cases of a disease or health
condition in a population at some designated time, indicates extent of a health
problem, implications, and scope, describes burden
proportion of cases among total population, how common is it
Numerator: # cases present in population at specific time
Denominator: # of persons in population at specific time
Point vs Period Prevalence - 🧠ANSWER ✔✔Point: prevalence of the disease at a
SINGLE POINT in time
Numerator: count of existing cases at point of observation
Denominator:Count of population at point of observation
Period: prevalence of disease at ANY TIME during specified period
Numerator: total count of existing cases at any time during period of
observation
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619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED
Morbidity and Mortality 2024/2025 Exam
Questions and Detailed Answers | Get it
100% Correct Answers
Four categories of epidemiology measures - 🧠ANSWER ✔✔1. Counts
2. Ratios
3. Proportions
4. Rates
count - 🧠ANSWER ✔✔the number of cases of a disease or other health
phenomenon being studied
ratio - 🧠ANSWER ✔✔the value obtained by dividing one quantity by another
Ex: simple sex ratio (M to F cases), demographic sex ratio (M per 100 F), sex
ratio at birth (M births/F births * 1000)
proportion - 🧠ANSWER ✔✔type of ratio where the numerator is part of the
denominator, expressed as a percent to illustrate magnitude of a problem
Page 1 of 7
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER:
619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED
, Rate - 🧠ANSWER ✔✔type of ratio (not proportion) where the denominator
includes a measure of time and the unit size of the population and the
numerator is the frequency of disease over the time period
Prevalence - 🧠ANSWER ✔✔number of existing cases of a disease or health
condition in a population at some designated time, indicates extent of a health
problem, implications, and scope, describes burden
proportion of cases among total population, how common is it
Numerator: # cases present in population at specific time
Denominator: # of persons in population at specific time
Point vs Period Prevalence - 🧠ANSWER ✔✔Point: prevalence of the disease at a
SINGLE POINT in time
Numerator: count of existing cases at point of observation
Denominator:Count of population at point of observation
Period: prevalence of disease at ANY TIME during specified period
Numerator: total count of existing cases at any time during period of
observation
Page 2 of 7
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER:
619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED
