Fig. 1. Association between income disparity and length of stay.
The trend line is from a regression model, with Log10 length of stay as the independent variable and the difference between income generated and COA as the dependent variable. This found a significant association (R2 = 0.856, p < 0.001), with an estimated breakeven point (i.e. cost discrepancy = 0) of 4.8 days. Several coded income values were identical, hence some points are superimposed.