Table 3.
Adjusted odds ratios of pneumonia for increasing units of transfusions
| Number of Perioperative Transfusion Units | ||||||||
|---|---|---|---|---|---|---|---|---|
| No units (Reference) | 1 | 2 | 3 | 4 | 5 | ≥ 6 | Trenda (CI95%) | |
| Age | ||||||||
| <60 | 1.5 | 1.1 | 2.4 | 5.8 | 6.8 | 8.8 | 1.5 (1.3, 1.6) | |
| 60–69 | 0.8 | 2.7 | 4.8 | 5.5 | 7.2 | 18.6 | 1.6 (1.5, 1.8) | |
| >=70 | 2.1 | 2.5 | 4.7 | 5.7 | 10.4 | 18.5 | 1.6 (1.5, 1.7) | |
| Sex | ||||||||
| Males | 1.7 | 2.7 | 4.6 | 7.7 | 11.0 | 15.6 | 1.6 (1.5, 1.7) | |
| Females | 1.0 | 1.0 | 2.1 | 2.3 | 3.6 | 11.0 | 1.5 (1.4, 1.7) | |
| Acuity | ||||||||
| Elective | 1.3 | 1.9 | 4.3 | 4.3 | 5.7 | 14.9 | 1.6 (1.4, 1.7) | |
| Urgent | 1.6 | 2.0 | 2.7 | 4.7 | 7.3 | 13.9 | 1.6 (1.5, 1.6) | |
| Emergent/Salvage | NA | 2.3 | 12.8 | 8.1 | 10.9 | 14.9 | 1.6 (1.3, 1.9) | |
| Chronic Obstructive Pulmonary Disease | ||||||||
| No | 1.3 | 2.0 | 3.9 | 4.6 | 8.3 | 13.4 | 1.6 (1.5, 1.6) | |
| Yes | 2.1 | 2.1 | 2.7 | 7.3 | 6.0 | 17.1 | 1.6 (1.4, 1.8) | |
| Smoking | ||||||||
| No Smoking Hx | 1.5 | 2.3 | 4.1 | 6.6 | 10.1 | 16.1 | 1.6 (1.5, 1.7) | |
| Smoking within 1 Year | 1.1 | 0.9 | 3.1 | 1.8 | 6.1 | 11.5 | 1.5 (1.3, 1.7) | |
| Smoking within 2 Wks | 1.7 | 2.3 | 3.8 | 5.1 | 5.1 | 15.7 | 1.5 (1.4, 1.7) | |
| Other Blood Products | ||||||||
| No | 1.6 | 1.9 | 3.1 | 4.4 | 7.1 | 22.1 | 1.6 (1.5, 1.7) | |
| Yes | 0.3 | 1.4 | 2.3 | 2.3 | 3.4 | 3.9 | 1.3 (1.2, 1.5) | |
Adjusted for: predicted risk of mortality, pre-operative Hct, pre-operative pneumonia, perfusion time, medical center
a
Odds ratio reflecting the relative odds of pneumonia per 1 unit increase in red blood cells