Table 1. Demographic characteristics and potential risk factors for the development of anti-HLA antibodies, according to the PRA results.
| PRA - Positive | PRA - Negative | P - value | |
| (n = 182) | (n = 87) | ||
| Mean age (years) | 52.0±13.2 | 52.4±12.0 | |
| Gender | |||
| Males | 106 (58.2%) | 66 (75.9%) | |
| Females | 76 (41.8%) | 21 (24.1%) | 0.0064 |
| Ethnic group | |||
| White (Caucasian) | 104 (57.1%) | 52 (59.7%) | |
| Brown (Mestizo) | 54 (29.7%) | 16 (18.4%) | |
| Black | 20 (11.0%) | 14 (16.1%) | |
| Yellow (Oriental) | 4 (2.2%) | 5 (5.8%) | |
| Potential risk factors | |||
| Mean dialysis duration (years) | 7.0±3.8 | 6.3±3.4 | |
| Any transfusions (no. of patients) | 110 (60.4%) | 50 (57.5%) | |
| Number of blood transfusions (units) | 3.14±7.05 | 2.16±3.85 | |
| Any pregnancies (no. of females) | 62 (81.6%) | 15 (71.4%) | |
| Previous transplantation history (no. of patients) | 16 (8.8%) | 4 (4.6%) |