Healthcare Data Visualization & Dashboards Flashcards

Which type of chart is most appropriate for displaying a patient's vital sign trends over a 72-hour ICU stay?

Answer: Line chart

Line charts are ideal for displaying continuous data over time, making them the best choice for tracking vital sign trends across a defined time period.

A healthcare dashboard shows hospital readmission rates by department. Which visualization principle ensures viewers correctly interpret magnitude differences?

Answer: Starting the Y-axis at zero

Starting the Y-axis at zero prevents visual distortion of magnitude differences and ensures viewers accurately compare bar heights without being misled.

In a population health dashboard, which chart type is best suited to show the distribution of patient BMI values across a large cohort?

Answer: Histogram

Histograms display the frequency distribution of a continuous variable like BMI, making patterns such as skewness and central tendency immediately visible.

A clinical analyst wants to display the relationship between patient age and length of hospital stay. Which visualization is most appropriate?

Answer: Scatter plot

Scatter plots are designed to reveal correlations and relationships between two continuous variables, making them ideal for comparing age against length of stay.

Which dashboard design principle advises grouping the most critical KPIs in the upper-left area of the screen?

Answer: F-pattern reading behavior

Eye-tracking research shows users scan screens in an F-pattern, reading left-to-right then downward, so placing critical KPIs in the upper-left aligns with natural viewing behavior.

A hospital executive dashboard uses red, yellow, and green indicators for metrics. What is this visualization technique called?

Answer: Traffic light / RAG status

Red-Amber-Green (RAG) or traffic light status indicators provide instant visual cues about metric performance relative to defined thresholds.

Which metric should be used to assess how efficiently a dashboard communicates data by minimizing unnecessary graphical elements?

Answer: Data-ink ratio

Edward Tufte's data-ink ratio measures the proportion of ink used to convey actual data versus decorative elements, with a higher ratio indicating a more efficient visualization.