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Selecting population & measures

Using Ellipse starts by selecting relevant populations and measures.

Selecting a population

  1. In the "Population" section of the sidebar, click the currently selected population or "Select a population".
  2. Select a study that represents the right population by clicking one in the list.
  3. If you have not selected two measures yet or if any of the previously selected measures are unavailable for the population, you will be shown the list to select measures.

Note: Studies approximate the population they represent using a sample. Various factors including sample size, age distribution and sex ratio may affect the validity of results.

Note: Populations with a lock icon next to their name are locked. To use these populations you need to sign in or create a free account.

Filtering a population by sex

  1. In the "Population" section of the sidebar, click the currently selected population or "Select a population".
  2. Select either "male" or "female" to limit the population to either sex or select "mixed" to include both male and female individuals.

Note: Data for mixed populations assumes an equal distribution between male and female individuals (unless the study uses a different distribution). This may not be the population's true ratio of men and women.

Filtering a population by age

  1. In the "Population" section of the sidebar, click the currently selected population or "Select a population".
  2. Do any of the following:
    • Select an age group.
    • Use the range slider to select a custom age range.

Selecting measures

  1. In the "Measures" section of the sidebar, click the currently selected measure or "Select a measure" for the axis you wish to change.
  2. Click any of the measure groups in the right column to view the available measures.
  3. Select a measure by clicking one in the graphic or in the list. Measures available for the selected population have a blue border. Note: Not all measures might be shown in the graphic. Additional measures are shown in a list below the graphic.
  4. If you have not selected a population yet, you will be shown the list to select a population. If you have not selected the measure for the other axis yet, you will be shown the list to select the other measure.
  • Selecting a measure that is also selected for the other axis will switch the axes instead of selecting the same measure for both axes.

Note: Measures with a lock icon instead of a number or with a lock icon next to their name are locked. To use these measures you need to sign in or create a free account.

Looking up background information on populations and measures

  1. In the "Population" or "Measures" section of the sidebar, click any selected population or measure.
  2. Information on the currently selected measure or population is displayed next to the list or graphic. To view information on another population or measure, hover the pointer over that population or measure.

Undoing and redoing changes

  1. Press the Control + Z keys (Command + Z on macOS) to undo any changes.
  2. Press the Control + Y keys (Command + Shift + Z on macOS) to redo any changes that have been undone.

Note: You can undo any changes you make to your analysis. This includes changes to boxes as well as the population and measures.