Same-day treatment in hospitals
Explain that when categorical data are recorded over time, time can be used as a grouping variable.
Click Stacked. Observe the trend in the total number of patients.
Choose Propn within Year. Observe how the proportion of same-day patients increased. (The unstacked version is perhaps clearest.)
Trends in the proportion of hospital patients who are treated and released on the same day affect planning for the number of beds that are required. The diagram shows numbers of patients in Australian hospitals, categorised whether they are treated and released on the same day or stay overnight.