Table 2. Risk Factors and Outcomes (Mortality and Summative Length of Acute/Skilled Care Stay) Analysis With Respect to ABO/Rh Blood Groups.
| Risk factors | Total | ABO blood type |
Rh type |
||||||
|---|---|---|---|---|---|---|---|---|---|
| A | AB | B | O | P value | Negative | Positive | P value | ||
| Age (n = 825), mean ± SD | 57.64 ± 18.17 | 60.29 ± 18.74 | 61.52 ± 17.25 | 62.47 ± 16.84 | 55.01 ± 17.85 | 0.0001* | 64.15 ± 17.97 | 57.31 ± 18.13 | 0.013* |
| Sex (n = 825) | 0.344 | 0.36 | |||||||
| Female | 325 | 84 | 15 | 46 | 179 | 13 | 312 | ||
| Male | 500 | 135 | 12 | 66 | 287 | 27 | 473 | ||
| Past medical history | |||||||||
| Hypertension (n = 360), n (%) | 289 (80%) | 74 (21%) | 12 (3%) | 48 (13%) | 155 (43%) | 0.011* | 13 (4%) | 276 (77%) | 0.069 |
| Diabetes (n = 822), n (%) | 317 (39%) | 87 (11%) | 15 (2%) | 51 (6%) | 164 (20%) | 0.048* | 11 (1%) | 306 (37%) | 0.14 |
| BMI (n = 825), mean ± SD | 28.35 ± 6.03 | 27.81 ± 5.63 | 27.57 ± 5.86 | 27.55 ± 6.68 | 28.83 ± 6.03 | 0.027* | 29.32 ± 8.44 | 28.31 ± 5.88 | 0.867 |
| HbA1c (n = 554), mean ± SD | 6.92 ± 2.19 | 7.23 ± 2.42 | 6.32 ± 1.11 | 7.08 ± 1.94 | 6.78 ± 2.18 | 0.007* | 6.32 ± 1.39 | 6.95 ± 2.22 | 0.205 |
| Outcomes | A-positive | A-negative | B-positive | B-negative | AB-positive | AB-negative | O-positive | O-negative | P value |
| Total | 17 | 203 | 1 | 26 | 5 | 107 | 17 | 449 | |
| Length of stay (days) | 0.933 | ||||||||
| Mean | 11.9 | 14.4 | 10 | 12.3 | 10.0 | 12.8 | 8.7 | 14.1 | |
| SD | 10.28 | 16.66 | - | 13.7 | 4.85 | 13.93 | 7.91 | 14.9 | |
| Mortality, n (%) | 6 (35%) | 73 (36%) | 1 (100%) | 9 (35%) | 4 (80%) | 40 (37%) | 10 (59%) | 135 (30%) | 0.032 |
| Sub-groups by ABO/Rh factor | ABO blood type | Rh type | |||||||
| A | AB | B | O | P value | Negative | Positive | P value | ||
| Mortality by ABO and Rh factor separately | Total | 220 | 27 | 112 | 466 | 0.312 | 40 | 785 | 0.010* |
| N (%) | 79 (36%) | 10 (37%) | 44 (39%) | 145 (31%) | 21 (53%) | 257 (33%) | |||
*Denotes statistical significance. SD: standard deviation.