TABLE 1.
Results
| Infection | Hospitalization | Admission to ICU | Mechanical ventilation | Mortality | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Studies (participants) | OR (95% CI) | I2 | Studies (participants) | OR (95% CI) | I2 | Studies (participants) | OR (95% CI) | I2 | Studies (participants) | OR (95% CI) | I2 | Studies (participants) | OR (95% CI) | I2 | |
| O versus non‐O | 29 (1,564,162) | 0.88 (0.82–0.94) | 91% | 11 (35,848) | 0.99 (0.94–1.05) | 0% | 20 (32,690) | 1.01 (0.93–1.09) | 0% | 12 (10,210) | 1.09 (0.96–1.24) | 0% | 26 (37,755) | 0.99 (0.92–1.06) | 4% |
| O versus A | 29 (1,309,081) | 0.88 (0.82–0.94) | 89% | 11 (30,562) | 1.01 (0.93–1.10) | 29% | 18 (25,475) | 1.01 (0.92–1.11) | 0% | 10 (6878) | 1.10 (0.84–1.45) | 49% | 25 (28,815) | 0.93 (0.86–1.00) | 0% |
| O versus B | 29 (899,262) | 0.91 (0.83–0.99) | 86% | 11 (20,960) | 1.02 (0.94–1.12) | 0% | 18 (20,039) | 0.98 (0.84–1.14) | 17% | 10 (6093) | 1.02 (0.80–1.30) | 27% | 25 (22,068) | 1.11 (1.01–1.23) | 0% |
| O versus AB | 28 (774,713) | 0.83 (0.73–0.95) | 84% | 11 (19,805) | 0.96 (0.72–1.28) | 64% | 18 (15,489) | 0.96 (0.79–1.16) | 0% | 10 (4580) | 1.07 (0.68–1.68) | 32% | 24 (17,457) | 0.99 (0.84–1.16) | 0% |
| A versus non‐A | 29 (1,560,198) | 1.08 (1.02–1.15) | 87% | 11 (36,154) | 0.99 (0.90–1.08) | 49% | 18 (32,209) | 1.00 (0.91–1.10) | 8% | 10 (9599) | 0.91 (0.67–1.24) | 65% | 27 (39,542) | 1.13 (1.03–1.23) | 17% |
| A versus B | 29 (789,217) | 1.04 (0.96–1.13) | 82% | 11 (19,363) | 0.93 (0.78–1.11) | 62% | 18 (16,720) | 0.98 (0.81–1.17) | 35% | 10 (5019) | 0.86 (0.57–1.29) | 61% | 25 (20,107) | 1.20 (1.08–1.33) | 0% |
| A versus AB | 28 (664,666) | 0.95 (0.85–1.05) | 75% | 11 (16,935) | 1.01 (0.88–1.15) | 0% | 18 (13,212) | 0.98 (0.80–1.19) | 0% | 10 (3506) | 0.86 (0.44–1.67) | 62% | 24 (15,483) | 1.08 (0.92–1.26) | 0% |
| B versus non‐B | 29 (1,564,162) | 1.01 (0.94–1.09) | 82% | 11 (36,168) | 1.08 (0.92–1.25) | 58% | 18 (20,779) | 0.97 (0.84–1.11) | 0% | 10 (9599) | 1.04 (0.81–1.32) | 33% | 25 (37,591) | 0.88 (0.80–0.96) | 0% |
| B versus AB | 28 (254,978) | 0.94 (0.86–1.04) | 63% | 11 (5606) | 1.07 (0.88–1.29) | 21% | 18 (6734) | 0.99 (0.80–1.22) | 0% | 13 (2721) | 1.04 (0.64–1.68) | 31% | 25 (8776) | 0.91 (0.77–1.09) | 0% |
| A/AB versus B/O | 29 (1,564,162) | 1.13 (1.06–1.21) | 90% | 11 (36,154) | 0.98 (0.89–1.07) | 51% | 18 (31,539) | 0.99 (0.91–1.08) | 0% | 11 (9731) | 0.93 (0.76–1.13) | 33% | 25 (37,551) | 1.10 (1.02–1.18) | 0% |
| B/AB versus A/O | 29 (1,743,669) | 1.27 (1.16–1.38) | 91% | 11 (36,154) | 1.04 (0.91–1.18) | 52% | 18 (32,209) | 1.03 (0.89–1.20) | 34% | 10 (9599) | 1.06 (0.78–1.43) | 58% | 25 (37,591) | 0.89 (0.82–0.97) | 0% |
Abbreviations: CI, confidence interval; ICU, intensive care unit; OR, odds ratio.
Bold values indicate there is a statistically significant difference between the groups