Table 2.
Patients' Data, Categorical Variables
| Variable | Infected (n = 101) | Noninfected (n = 1847) | p | ||
|---|---|---|---|---|---|
| (N) | Percentages (%) | (N) | Percentages (%) | ||
| Gender (male/female) | 56/45 | 55/45 | 682/1165 | 37/63 | <0.001a |
| Ethnicity (white/black/other) | 83/14/3b | 83/14/3 | 1288/164/15b | 88/11/1 | 0.129 |
| Joint (hip/knee) | 31/70 | 31/69 | 1084/763 | 59/41 | <0.001a |
| Laterality (unilateral/bilateral) | 75/24b | 76/24 | 1591/256 | 86/14 | 0.007a |
| ASAPS score (1–2/3–4) | 28/53b | 35/65 | 734/470b | 61/39 | <0.001a |
| Charlson index (≤3/>3) | 74/27 | 73/27 | 1618/229 | 88/12 | <0.001a |
| Prior MI | 9 | 9 | 64/1783 | 3 | 0.011a |
| Congestive heart failure | 7 | 7 | 15/1832 | 1 | <0.001a |
| Lung disease | 12 | 12 | 177/1670 | 10 | 0.488 |
| Connective tissue disease | 4 | 4 | 67/1780 | 4 | 0.784 |
| Renal disease | 7 | 7 | 11/1836 | 1 | <0.001a |
| Homologous transfusions | 44b | 45 | 319/1526b | 17 | <0.001a |
| Autologous transfusions | 54b | 56 | 1347/497b | 73 | <0.001a |
| DM | 22 | 22 | 162/1685 | 9 | <0.001a |
a
p < .05.
b
Values do not add up to the total number of patients (some data were missing).