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Flashcards in Measurement of disease and health Deck (10):
1

 

 

 

Name a few factors that can increase or
or decrease the prevalence

 

 

• Incidence
•  Duration
•  Immigration and emigration
•  Diagnosis
•  Treatment
•  Report

2

 

 

 

 

What does incidence measure? 

 

 

 

incidence is a measures the risk of developing a disease

3

 

 

 

 

Define Incidence

The number of new cases of a disease occurring in the population during a specific period of time divided by the number of persons at risk for developing the disease in the population

4

 

 

 

 

Name a few uses of Epidemiology

  •  describe impact of disease on a population
  • describe natural history of disease
  • Causes of disease
  • Assess quality of diagnostic and screening tests
  • select an appropriate and effective intervention strategy 
  • evaluate effectiveness of intervention and prevention programs
  • evaluate effectiveness of health services
  •  evaluate disease screening programs
  • ormulation and evaluation of health policy

5

 

 

 

What element must be included when calculating incidence so that it will be a measure of risk

 

 

TIME

We must specify a period of time and have all of the individuals in the denominator followed up for that entire period

6

 

 

 

 

Define incidence rate

 

 

 

The rate at which new events occur in a population.The numerator is the number of new events that occur in a defined period or other physical span. The denominator is the population at risk of experiencing the event during this period, sometimes expressed as person-time; it may instead be in other units, such as passenger-miles. 

7

 

 

 

When calculating incidence, what does the denominator represent? 

 

 

The denominator represents the number of people who are at risk for developing the disease 

8

 

 

 

Define incidence rate ratio

 

 

The incidence rate in the exposed group divided by the incidence rate in the unexposed group. Often referred to as the rate ratio.

9

 

 

 

Define epidemiology

 

 

Epidemiology is the study of how disease is distributed in
   populations and of the factors that influence or determine this
   distribution

10

 

 

 

 

Incidence per 1,000=

 

 

 

# of new cases of a disease occurring in the
population during a specific period of time
     I =-------------------------------------------------------------- *1000
# of persons at risk of developing the disease
during that period of time