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Table 3 The effect of ABO blood type on 30-day mortality in critically ill patients—individual patient data meta-analyses

From: ABO blood types and sepsis mortality

Blood type (percentage of cohort)

Univariable

Multivariablea

Fixed effect

Heterogeneity

Fixed effect

Heterogeneity

HR

(95%-CI)

p

I2 (%)

p

HR

(95%-CI)

p

I2 (%)

p

A (38%)

1.00

    

1.00

    

B (14%)

0.88

(0.78–0.98)

0.02

13

0.32

0.87

(0.77–0.97)

0.01

16

0.30

O (44%)

0.97

(0.90–1.05)

0.42

0

0.69

0.96

(0.89–1.04)

0.33

0

0.82

AB (4%)

0.98

(0.82–1.18)

0.87

53

0.12

0.99

(0.82–1.18)

0.87

51

0.13

Non-B (86%)

1.00

         

B (14%)

0.89

(0.80–0.99)

0.03

48

0.15

0.88

(0.80–0.98)

0.02

38

0.20

  1. aAll cohorts adjusted for age, sex, ischemic heart disease, previous stroke and whether the patient had a pulmonary infection focus. The analyses are stratified for recruiting centre