Skip to main content

Advertisement

Table 1 Cross-sectional analysis: special cause variation in Observed and Risk-Adjusted mortality rates for coronary artery bypass grafting surgery 1994 to 2003 in New York hospitals.

From: Case-mix and the use of control charts in monitoring mortality rates after coronary artery bypass

Observed mortality rate Risk Adjusted mortality rate
  Special cause variation (low) Common cause variation Special cause variation (high) Total
Special cause variation (low) 2 4 0 6
Common cause variation 0 281 6 287
Special cause variation (high) 0 3 2 5
Total 2 288 8 298