Interpreting Data on Disease Incidence Flashcards

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What does disease incidence mean?

Disease incidence is the number of new cases of a disease in a population during a given time period.

How is disease incidence usually written so we can compare different sized populations?

It is often written as the number of new cases per 1,000 or per 100,000 people each year.

Why do scientists use incidence per 100,000 people instead of just the number of cases?

Using a rate per 100,000 people lets us compare how common a disease is in groups of different sizes.

What does it mean if a line graph of disease incidence goes up over time?

It means the disease is becoming more common, with more new cases each year.

What does it mean if a line graph of disease incidence goes down over time?

It means the disease is becoming less common, with fewer new cases each year.

In a bar chart of disease incidence, what does a taller bar show?

A taller bar shows a higher incidence, so more new cases in that group.

What is a trend in disease incidence data?

A trend is the overall pattern, such as incidence rising, falling, or staying about the same over time.

What is a peak on a graph of disease incidence?

The peak is the point where the incidence reaches its highest value.

How would you calculate disease incidence per 100,000 people in a year?

Divide the number of new cases by the total population, then multiply the answer by 100,000.

When comparing disease incidence between two age groups, what should you say in your answer?

State which age group has the higher or lower incidence and support it with numbers from the data.

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