Table 3.

Projected Baseline Trend Versus Observed Proportion Undergoing Cardiac Surgery and With Mortality

Outcome	Projected Q1 2015, %	Observed Q1 2015, %	Relative Difference
Cardiac surgery
IDU	13.0 (7.5–21.5)	9.8 (6.2–15.0)	−33%
Non-IDU	16.3 (10.4– 24.7)	12.4 (8.0–18.8)	−31%
Mortality
IDU	3.7 (2.2–6.2)	3.2 (1.8–5.4)	−16%
Non-IDU	4.6 (2.7–7.8)	4.0 (2.3–6.8)	−16%

Data are from Q1 2015, 2 years following the implementation of public reporting. Parenthesis include 95% confidence intervals in both Tables 2 and 3.Abbreviations: IDU, injection drug use; Q1, quartile 1.