Coronadashboard data explained
- Coronadashboard data explained

Age groups in graphs

Where do the numbers come from?

A view on patients
The National Institute for Public Health and the Environment (RIVM) provides the figures on the ages of admitted patients as open data.

Age division of the Dutch population
Figures on the age distribution of the population come from open data from Statistics Netherlands (CBS).

How are the numbers calculated?

A view on patients
The data contains the weekly totals of the admissions that took place in that week per age group. It is supplied by Stichting National Intensive Care Evaluation (NICE) and processed by RIVM. The graphs for hospital and ICU admissions show those weekly totals. To be able to compare age groups, we calculate numbers per 1 million people from a specific age group. We determine the population size per age group on the basis of the CBS classification.

Calculation example
The average of the number of positive tests, of people aged 90 and older, is 26.14 out of 129,831 people aged 90+.
The calculation is 26.14 / 129,831 x 100,000 ≈ 20.13.
Per 100,000 people aged 90+, 20.13 people have tested positive.

By doing this with all age groups, we can compare the groups with each other.
The national average in the age graph is the average of all cases for which the age is known.

When comparing, for example, the age group 90+ with the national average, this national average consists of all age groups including those of 90+.

Adjustments and corrections

The last days in the graph are not yet complete. RIVM supplements the figures with retroactive effect and can also make corrections.