Table 4:
Relative Risk Ratio of Intraoperative Red Cell Unit Transfusion for Revision Cardiac Surgery Compared to Primary Surgery
| Unadjusted | Adjusted* | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Relative Risk Ratio | Confidence Interval | P-value | Relative Risk Ratio | Confidence Interval | P-value | |||||
| CAB/ Valve | ||||||||||
| 0 Units (reference) | ||||||||||
| 1–5 units | 1.9 | 1.4–2.7 | <0.001 | 1.8 | 1.14–2.9 | 0.01 | ||||
| 6–10 units (moderate transfusion) | 10.2 | 5.5–18.9 | <0.001 | 8.1 | 3.7–17.9 | <0.001 | ||||
| > 10 units (massive transfusion) | 30.6 | 7.5–125.1 | <0.001 | 22.9 | 3.0–174.8 | 0.003 | ||||
| Other | ||||||||||
| 0 Units (reference) | ||||||||||
| 1–5 units | 2.1 | 1.6–2.7 | <0.001 | 2.1 | 1.5–3.0 | <0.001 | ||||
| 6–10 units (moderate transfusion) | 4.2 | 2.9–6.3 | <0.001 | 2.5 | 1.5–4.4 | 0.001 | ||||
| > 10 units (massive transfusion) | 5.6 | 3.1–10.0 | <0.001 | 2.4 | 1.1–5.4 | 0.03 | ||||
*
Adjusted for age, weight, gender, surgery time, first hemoglobin, Charlson score, and anti-platelet medications