Table 2.
Effect of blood type on mortality in the three ICU cohorts—Cox regression
| Blood type (percentage of cohort) | Univariable | Multivariablea | ||||
|---|---|---|---|---|---|---|
| HR | (95%-CI) | P | HR | (95%-CI) | P | |
| PASS cohort | ||||||
| A (45%) | 1.00 | 1.00 | ||||
| B (11%) | 0.64 | (0.42–0.99) | 0.05 | 0.63 | (0.41–0.97) | 0.03 |
| AB (4%) | 1.61 | (0.98–2.62) | 0.06 | 1.59 | (0.97–2.61) | 0.06 |
| O (40%) | 1.04 | (0.82–1.32) | 0.74 | 1.00 | (0.79–1.27) | 0.99 |
| Non-B (89%) | 1.00 | 1.00 | ||||
| B (11%) | 0.61 | (0.41–0.94) | 0.02 | 0.61 | (0.40–0.93) | 0.02 |
| TRISS cohort | ||||||
| A (43%) | 1.00 | 1.00 | ||||
| B (11%) | 0.87 | (0.57–1.32) | 0.51 | 0.91 | (0.60–1.38) | 0.66 |
| AB (4%) | 0.92 | (0.47–1.81) | 0.81 | 1.04 | (0.52–2.07) | 0.91 |
| O (42%) | 1.05 | (0.82–1.36) | 0.68 | 1.04 | (0.80–1.34) | 0.78 |
| Non-B (89%) | 1.00 | 1.00 | ||||
| B (11%) | 0.85 | (0.57–1.27) | 0.42 | 0.89 | (0.60–1.32) | 0.57 |
| CCF cohort | ||||||
| A (37%) | 1.00 | 1.00 | ||||
| B (14%) | 0.90 | (0.79–1.01) | 0.08 | 0.89 | (0.79–1.01) | 0.06 |
| AB (4%) | 0.92 | (0.75–1.13) | 0.43 | 0.92 | (0.75–1.13) | 0.42 |
| O (44%) | 0.96 | (0.88–1.05) | 0.37 | 0.96 | (0.88–1.05) | 0.34 |
| Non-B (86%) | 1.00 | 1.00 | ||||
| B (14%) | 0.92 | (0.82–1.03) | 0.14 | 0.91 | (0.82–1.02) | 0.12 |
aAll cohorts adjusted for age, sex, ischemic heart disease, previous stroke and whether the patient had a pulmonary infection focus