Measures Of Disease Frequency Flashcards
What’s is prevelance
The proportion of people that already has the condidition
EXISTING CASES
What is incidence
How many new people develop in a defined population as time passes
What is point prevelance
The proportion of people who are sick at a specific point in time
What is incidence rate
The number of new cases per unit of person time at risk
How fast the disease is occurring in the population
What is cumulative incidence
The number of people who get sick during a specific time period
Using the bathtub analogy
What is the level of water in the basin
Prevelance
Using the bathtub analogy
What is the flow of water through the tap
The incidence
Using the bathtub analogy
How does the water leave the basin
Death [drain]
Recovery or emigration [evapouration]
How do you approximately calculate prevelance
Incidence rate X average duration
What are some factors that increase prevelance
Increased incidence
Longer duration of disease
In migration of cases
Out migration of healthy people
What is perinatal mortality
Death between 28 weeks gestation and 7 days old
What is neonatal mortality
Death in the first 28 days of life
Early [0-7days]
Late[7-28 days]
What is infant mortality
Death in the first year of life
