Increase in new cases in a community denotes:
|A||Increase in prevalence rate|
|B||Increase in incidence rate|
|C||Decrease in incidence rate|
|D||Decrease in prevalence rate|
INCIDENCE RATE is defined as the number of new cases occurring in a defined population during a specified period of time.
Incidence rate refers to:
a. Only to new cases.
b. During a given period.
c. In a specified population or population at risk.
d. Can also refer to new spells or episodes of disease arising in a given period of time per 1000 population.
Increase in new cases will first increase the incidence of the disease but in the long run will also increase the prevalence.
Decrease in the number of cases due to cure, death or migration or decrease in the duration of illness as may occur with faster treatment becoming available will decrease the prevalence of the disease.