Question

Of the 10 million residents in Los Angeles County, there 543,769 laboratory-confirmed cases (11,194 new cases), which is the crude rate of 1,144 per 100,000 and an adjusted case rate of 1,128 per 100,000. In addition, there are 8,431 deaths (86 new deaths), and 4,403 current hospitalizations across the LA region.

What is the incidence rate and prevalence rate

Answer 1

Incidence is the occurrence of new cases or injury occurring over a specific period of time

Formula for incidence rate = new cases of a specific disease during a particular period/ total number of population at risk × 1,00,000

• 11194 x 1,00,000 / 10000000
• 1119.4 per 1,00000

Prevalence is defined as the total number of cases of a disease ( old and new) occurring over a specific period of time

Prevalence rate = total number of cases / total number of population at risk x 100000

• 543769 × 100000 / 1000000
• 54376.9 per 1,00000