Table 4.
The changes of trend due to interventions for patients undergoing CABG (pre-vs post- and Michigan vs non-Michigan centers)
| Time period and Michigan vs non-Michigan comparisons | Odds ratio (per mo increase) |
95% CI | P value | |
|---|---|---|---|---|
| Non-Michigan—preintervention | 1.16 | 1.05 | 1.29 | .0049 |
| Non-Michigan—post (time 11-18) | 0.74 | 0.66 | 0.84 | <.0001 |
| Non-Michigan—post (time >18) | 1.10 | 1.04 | 1.16 | .0011 |
| Michigan—pre | 0.98 | 0.94 | 1.02 | .2449 |
| Michigan—post (time 11-18) | 1.88 | 1.78 | 1.99 | <.0001 |
| Michigan—post (time >18) | 1.20 | 1.15 | 1.26 | <.0001 |
| Michigan—post (time 11-18) vs pre | 1.93 | 1.78 | 2.09 | <.0001 |
| Non-Michigan—post (time 11-18) vs pre | 0.64 | 0.52 | 0.78 | <.0001 |
| Pre: Michigan vs non-Michigan | 0.84 | 0.75 | 0.94 | .0024 |
| Post (time 11-18): Michigan vs non-Michigan | 2.53 | 2.21 | 2.91 | <.0001 |
CI, Confidence interval; CABG, coronary artery bypass grafting.