Table III.
Relative risk for 30-day mortality and stroke in propensity-matched cohorts of patients undergoing CEA; transfused one or two units vs nontransfused controls (n = 240)
| Nontransfused | Transfused 1–2 units |
|||||
|---|---|---|---|---|---|---|
| Outcome | No. | % | No. | % | Relative risk (95% CI) | Exact P value |
| Cohort size | 160 | 80 | ||||
| Mortality | 2 | 1.3% | 2 | 2.5% | 2.0 (0.3–13.9) | .602 |
| Stroke | 2 | 1.3% | 5 | 6.3% | 5.0 (1.0–25.2) | .043 |
| Stroke or mortalitya | 4 | 2.5% | 7 | 8.8% | 3.5 (1.1–11.6) | .045 |
CEA, Carotid endarterectomy; CI, confidence interval.
a
No patient was recorded with both 30-day stroke and death, although this is possible in the National Surgical Quality Improvement Program protocol.