Measures of Disease Frequency

Question 1

Crude Mortality Rate

Answer 1

of Deaths (all causes)/# persons in population

Question 2

Cause Specific Morbidity Rate

Answer 2

of persons with Cause Specific Disease/# persons in population

Question 3

Cause Specific Mortality Rate

Answer 3

of Cause Specific Deaths/# persons in population

Question 4

Case Fatality Rate

Answer 4

Case Specific Deaths/# of cases of Disease

Question 5

Cause Specific Survival Rate

Answer 5

of Cause Specific cases alive/# of cases of Disease

Question 6

Live Birth Rate (usually per year)

Answer 6

of Live Births/1,000 population

Question 7

Fertility Rate (usually per year)

Answer 7

of Live Births/1,000 women of childbearing age (15-44yo)

Question 8

Neonatal Mortality Rate (usually per year)

Answer 8

deaths in those

Question 9

Postnatal Mortality Rate (usually per year)

Answer 9

of deaths in those btw 28 days and 1 year of age/1,000 live births

Question 10

Infant Mortality Rate (usually per year)

Answer 10

deaths in those

Question 11

Maternal Mortality Ratio

Answer 11

of female deaths related to pregnancy/100,000 live births

Question 12

Proportional Mortality Ratio (PMR)

Answer 12

of Cause Specific deaths/total # of deaths in population

Question 13

Crude Morbidity Rate

Answer 13

of persons with Disease/# persons in population

Question 14

Incidence (Risk, Attack Rate, Cumulative Incidence)

Answer 14

new cases of disease/# persons at risk for the disease (or in popul.)

Question 15

Incidence Rate

Answer 15

of new cases of disease/person-time at risk for disease (or in popul.)

Question 16

Incidence Density

Answer 16

of new cases of disease/total person-time of population at risk for diease

Question 17

Prevalence

Answer 17

of existing cases of disease/# of persons in population

Question 18

Point Prevalence

Answer 18

Prevalence at a given point in time

Question 19

Period Prevalence

Answer 19

Prevalence over a given period of time