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Table 2 Effect of blood type on mortality in the three ICU cohorts—Cox regression

From: ABO blood types and sepsis mortality

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
  1. aAll cohorts adjusted for age, sex, ischemic heart disease, previous stroke and whether the patient had a pulmonary infection focus