Cumulative Incidence Calculator

Formula

To calculate the cumulative incidence:

\[ CI = \frac{NC}{TP} \]

Where:

\(CI\) is the cumulative incidence
\(NC\) is the number of new cases of a disease
\(TP\) is the total population at risk

What is Cumulative Incidence?

Cumulative incidence is a ratio of the number of new cases of a disease to the total population that could be exposed to the disease. It is used to measure the risk of developing a disease over a specified period of time.

Example Calculation 1

Let's assume the following values:

Number of New Cases (\(NC\)) = 50
Total Population at Risk (\(TP\)) = 1000

Using the formula:

\[ CI = \frac{50}{1000} = 0.05 \]

The Cumulative Incidence is 0.05.

Example Calculation 2

Let's assume the following values:

Number of New Cases (\(NC\)) = 200
Total Population at Risk (\(TP\)) = 5000

Using the formula:

\[ CI = \frac{200}{5000} = 0.04 \]

The Cumulative Incidence is 0.04.