Table 2: Effect size estimates for blood types with and without correction for race and ethnicity.
Risks computed using linear regression (for prevalence) or the cumulative incidence from Fine-Gray models (for intubation and death). Risk differences and ratios computed relative to O ABO blood type and positive Rh(D) type.
| Unadjusted | Race/ethnicity adjusted | ||||||
|---|---|---|---|---|---|---|---|
| Outcome | Blood type | Risk | Risk difference | Risk ratio | Risk | Risk difference | Risk ratio |
| Prevalence | A | 17.5 (16.3 to 18.8) | 0.3 (−1.2 to 1.9) | 1.02 (0.93 to 1.12) | 18.0 (16.8 to 19.2) | 1.3 (−0.3 to 3.0) | 1.08 (0.98 to 1.19) |
| AB | 15.7 (12.8 to 18.7) | −1.5 (−4.5 to 1.7) | 0.91 (0.74 to 1.10) | 16.8 (13.9 to 19.8) | 0.1 (−2.8 to 3.2) | 1.01 (0.83 to 1.20) | |
| B | 17.9 (16.1 to 19.5) | 0.7 (−1.4 to 2.6) | 1.04 (0.92 to 1.16) | 18.0 (16.3 to 19.7) | 1.3 (−0.7 to 3.3) | 1.08 (0.96 to 1.20) | |
| O | 17.2 (16.2 to 18.1) | — | — | 16.7 (15.7 to 17.6) | — | — | |
| Rh-pos | 17.7 (17.0 to 18.4) | — | — | 17.6 (16.9 to 18.3) | — | — | |
| Rh-neg | 13.7 (11.8 to 15.5) | −4.0 (−6.1 to −2.0) | 0.77 (0.66 to 0.88) | 14.9 (13.0 to 16.8) | −2.7 (−4.7 to −0.8) | 0.85 (0.73 to 0.96) | |
| Intubation | A | 17.2 (14.2 to 20.1) | −3.2 (−7.5 to 0.3) | 0.84 (0.66 to 1.02) | 17.3 (14.3 to 20.4) | −2.9 (−7.2 to 0.6) | 0.85 (0.68 to 1.03) |
| AB | 21.8 (12.3 to 31.7) | 1.4 (−8.5 to 11.6) | 1.07 (0.59 to 1.57) | 22.1 (12.8 to 32.1) | 1.8 (−8.3 to 12.2) | 1.09 (0.60 to 1.59) | |
| B | 22.9 (18.6 to 27.6) | 2.5 (−2.5 to 7.6) | 1.12 (0.89 to 1.40) | 22.8 (18.6 to 27.5) | 2.5 (−2.7 to 7.5) | 1.12 (0.88 to 1.40) | |
| O | 20.4 (17.8 to 23.4) | — | — | 20.3 (17.7 to 23.3) | — | — | |
| Rh-pos | 20.3 (18.4 to 22.1) | — | — | 20.2 (18.4 to 22.1) | — | — | |
| Rh-neg | 14.6 (9.7 to 20.7) | −5.7 (−11.0 to 0.5) | 0.72 (0.47 to 1.02) | 15.0 (9.9 to 21.0) | −5.2 (−10.7 to 1.0) | 0.74 (0.48 to 1.05) | |
| Death | A | 13.3 (11.0 to 15.7) | −1.6 (−4.9 to 1.6) | 0.89 (0.71 to 1.11) | 13.2 (10.9 to 15.6) | −1.6 (−4.9 to 1.6) | 0.89 (0.71 to 1.12) |
| AB | 16.1 (8.5 to 23.8) | 1.2 (−6.6 to 8.9) | 1.08 (0.58 to 1.62) | 16.2 (8.7 to 23.5) | 1.4 (−6.4 to 8.9) | 1.10 (0.59 to 1.64) | |
| B | 11.8 (8.6 to 15.0) | −3.1 (−7.0 to 0.6) | 0.79 (0.56 to 1.05) | 12.2 (9.0 to 15.5) | −2.6 (−6.6 to 1.3) | 0.83 (0.58 to 1.09) | |
| O | 14.9 (12.9 to 17.1) | — | — | 14.8 (12.7 to 16.9) | — | — | |
| Rh-pos | 14.5 (13.0 to 16.0) | — | — | 14.5 (13.0 to 16.0) | — | — | |
| Rh-neg | 6.3 (3.0 to 10.1) | −8.2 (−11.7 to −3.8) | 0.44 (0.21 to 0.72) | 6.4 (3.0 to 10.3) | −8.2 (−11.7 to −3.7) | 0.44 (0.21 to 0.74) | |