TABLE 1.
Characteristics of blood donors whose specimens were used in the evaluation
| Characteristic | No. (%) of donors by Trypanosoma cruzi infection statusa |
|
|---|---|---|
| Positiveb | Negative | |
| Total | 448 (100) | 262 (100) |
| Sex | ||
| Male | 222 (49.5) | 109 (42.6) |
| Female | 226 (50.5) | 153 (58.4) |
| Ethnicityc | ||
| Hispanic | 181 (40.4) | 32 (12.2) |
| Non-Hispanic | 15 (3.4) | 225 (85.9) |
| Unknown | 252 (56.3) | 5 (1.9) |
| Region of birth | ||
| United States | 24 (3.4) | ND |
| Mexico | 86 (12.1) | ND |
| Central America | 77 (17.2) | ND |
| South America | 65 (14.5) | ND |
| Unknown | 196 (43.8) | 262 (100) |
| Region of blood centerd | ||
| California | 178 (39.2) | 100 (38.2) |
| West | 44 (9.8) | 30 (11.5) |
| Midwest | 28 (6.3) | 14 (5.3) |
| Northeast | 47 (10.5) | 26 (9.9) |
| Southeast | 151 (33.7) | 92 (35.1) |
a
Trypanosoma cruzi infection status as determined by American Red Cross screening and confirmation algorithm at the time of donation (23). ND, no data available.
b
Median age, 43 years; interquartile range, 33 to 50.5 years.
c
Blood donors with positive test results were significantly more likely to report Hispanic ethnicity (P < 0.001).
d
Seronegative specimens were frequency matched to seropositive specimens by donation region.