Johns Hopkins Individual Evidence Summary
Tool (Guide)
Si g ni f i ca nce
Incidence
Incidence is a measure of new cases of a disease and offers an estimate of
risk of developing that disease. Incidence is also the number of new cases
for a certain timeframe. Scientists provide incidence data concerning the
relative risk for a population, so you might see incidence data such as
positive cancer diagnosis in 1,000 people for example. This data is available
for your selected practice problem at the national and local level.
Prevalence
Prevalence is a measure of disease burden for a certain time frame in a
population. Prevalence includes newly diagnosed patients (incidence) and
includes patients in all stages of the disease, so prevalence data focuses on
the number of active cases of a disease for a timeframe in a population.
Prevalence is the incidence of a disease multiplied by its duration. Patients
continue in the prevalence numbers until they either are cured of the problem
or die. This data is available for your selected practice problem at the national
and local level.
Disability-Adjusted Live Year (DALY)
Disability-Adjusted Live Year (DALY) is a measure of years lost in life due to a
disability. This is a measure of current health compared to ideal health when
the person does not have a disease or disability. For a person with a disease
and disability, one DALY is equivalent to one theoretical year of life lost as
compared to the person living the same year disease-free. When DALY is
calculated for a disease, we add the years of life lost in premature mortality
and years of life lost due to disability. This data is available for your selected
practice problem at the national and local level.
Years of Life Lost (YLL)
Years of Life Lost (YLL) are calculated by multiplying the mortality of a disease
by the standard life expectancy for the population without the disease. This
data is available for your selected practice problem at the national and local
level.
Years Lost due to Disability (YLD)
Years Lost due to Disability (YLD) is calculated by multiplying the prevalence
by a standardized number called a weight. The standardized weight considers
variables that affect disability such as the age of a person and the severity of
, the disease. This data is available for your selected practice problem at the
national and local level.
Tool (Guide)
Si g ni f i ca nce
Incidence
Incidence is a measure of new cases of a disease and offers an estimate of
risk of developing that disease. Incidence is also the number of new cases
for a certain timeframe. Scientists provide incidence data concerning the
relative risk for a population, so you might see incidence data such as
positive cancer diagnosis in 1,000 people for example. This data is available
for your selected practice problem at the national and local level.
Prevalence
Prevalence is a measure of disease burden for a certain time frame in a
population. Prevalence includes newly diagnosed patients (incidence) and
includes patients in all stages of the disease, so prevalence data focuses on
the number of active cases of a disease for a timeframe in a population.
Prevalence is the incidence of a disease multiplied by its duration. Patients
continue in the prevalence numbers until they either are cured of the problem
or die. This data is available for your selected practice problem at the national
and local level.
Disability-Adjusted Live Year (DALY)
Disability-Adjusted Live Year (DALY) is a measure of years lost in life due to a
disability. This is a measure of current health compared to ideal health when
the person does not have a disease or disability. For a person with a disease
and disability, one DALY is equivalent to one theoretical year of life lost as
compared to the person living the same year disease-free. When DALY is
calculated for a disease, we add the years of life lost in premature mortality
and years of life lost due to disability. This data is available for your selected
practice problem at the national and local level.
Years of Life Lost (YLL)
Years of Life Lost (YLL) are calculated by multiplying the mortality of a disease
by the standard life expectancy for the population without the disease. This
data is available for your selected practice problem at the national and local
level.
Years Lost due to Disability (YLD)
Years Lost due to Disability (YLD) is calculated by multiplying the prevalence
by a standardized number called a weight. The standardized weight considers
variables that affect disability such as the age of a person and the severity of
, the disease. This data is available for your selected practice problem at the
national and local level.
