Exploratory propensity score analysis
| Outcome | Propensity score-adjusted risk difference* (95% CI) | p value |
|---|---|---|
| In-hospital/30-d mortality | −6.0% (−15.6% to 3.6%) | 0.22 |
| Reoperation for bleeding | −6.3% (−11.2% to −1.4%) | 0.012 |
| Respiratory failure | −5.2% (−19.5% to 9.0%) | 0.47 |
| Postoperative IABP | −12.9% (−19.8% to −6.1%) | < 0.001 |
| Neurological complications | −1.6% (−9.2% to 6.0%) | 0.68 |
| Stroke | 2.3% (−4.3% to 8.9%) | 0.49 |
| Arrest or serious arrhythmia | 3.2% (−22.5% to 28.9%) | 0.81 |
| Renal failure requiring dialysis | −5.9% (−10.5% to −1.4%) | 0.011 |
| Septicemia | −2.0% (−4.8% to 0.7%) | 0.15 |
| Wound infection | −2.9% (−6.1% to 0.3%) | 0.08 |
| Any of 10 major complications | −8.5% (−32% to 15%) | 0.49 |
| LOS | ||
| ICU LOS | −3.3 (−6.6 to −0.06) | 0.046 |
| > 4 d in ICU | −15.0% (−30.7% to 0.8%) | 0.06 |
| Hospital LOS | −4.3 (−8.6 to −0.06) | 0.047 |
| > 10 d in hospital | 6.9% (−21% to 35%) | 0.63 |
CI = confidence interval; IABP = intra-aortic balloon pump; ICU = intensive care unit; LOS = length of stay; MINI = mini-thoracotomy; STERN = conventional sternotomy.
↵* Adjusted risk differences (binary variables) and differences in means (continuous variables) obtained from inverse probability of treatment-weighted analysis. Differences in risk or means are for the MINI group relative to the STERN group. Therefore, for adverse events like death, a negative number is in favour of the MINI group.