Describing The Occurrence Of Disease Flashcards
(28 cards)
All people in a defined setting or with certain characteristics
Population
- location
- age, sex, race
- behavioral-smokers, alcohol users, etc
- occupation-Dr. nurses, etc
The number of new cases of a disease in a specified population within a given period of time
Indicende
Number of new cases/number of total people at risk for developing the disease in a population during that time period
Incidence rate
Measures how fast a disease is occurring
Incidence
Incidence of diabetes
On the rise
Incidence of melanoma
Increasing but predicted to steadil decrease by 2020
Number of people with a disease (new and old cases) in a specified population at a specified time
Prevalence
Number of people with a disease/total number of people in the population at that time
Point prevalence
This describes a rare and is the usual definition
Same a point prevalence but during a time period (month, year, etc)
Period prevalence
ARMD prevalence rates
Increases much more after the age of 74 in whites
Prevalence of DR
Much higher for older Hispanics
Prevalence of glaucoma
Much higher in blacks
Prevalence of open angle glaucoma
Black
Prevalence of NAG
Highest in Asian
Prevalence of NTG
Highest in Asian
Incidence vs prevalence
- prevalence snapshot of population at point in time
- prevalence affected by how long someone has disease
- prevalence can increase with better treatment (diabetes/insulin)
- prevalence can decrease rough death or cure
- incidence=new cases
Incidence vs prevalence of AIDS
Incidence increased and then sharply decreases in 1993
Prevalence of aids is steadily increasing (more people are alive that have AIDS because of modern medicine)
How to answer “pink eye is going around the classroom, what are the chances my child will get it”
You need to know
- the incidence
- the prevalence
- they are equally important
Morbidity
Illness or the state of having a disease
Mortality
Death
Mortality rate
Number of deaths in a population during a specified time period/number of people in the population during the period
-usually given per 100,00 people
Cause specific mortality rare
Number of deaths in a population due to a specific cause during a specified time period/number of people in the population during the period
Infant mortality rate
Children under 1 year, per 1,000 live births
Morbidity rate
Prevalence is a better term