Table 2.
Demographics of blood donors by case-control status
| Characteristic | Case | Control | ||
|---|---|---|---|---|
|
| ||||
| n | % | n | % | |
| Total | 341 | 100% | 791 | 100% |
| Blood Donation Center | ||||
| Recife | 110 | 32% | 194 | 25% |
| Belo Horizonte | 51 | 15% | 194 | 25% |
| São Paulo | 72 | 21% | 195 | 25% |
| Rio de Janeiro | 108 | 32% | 208 | 26% |
| Donor Status | ||||
| First Time | 183 | 54% | 201 | 25% |
| Repeat | 158 | 46% | 590 | 75% |
| Donation Type | ||||
| Community | 208 | 61% | 466 | 59% |
| Replacement | 106 | 31% | 249 | 31% |
| Other/Missing | 27 | 8% | 76 | 10% |
| Gender | ||||
| Male | 282 | 83% | 556 | 70% |
| Female | 59 | 17% | 235 | 30% |
| Age | ||||
| 18–25 | 98 | 29% | 189 | 24% |
| 26–30 | 77 | 23% | 130 | 16% |
| 31–39 | 91 | 27% | 235 | 30% |
| 40+ | 75 | 22% | 237 | 30% |
| Education | ||||
| ≤ Elementary School | 123 | 36% | 206 | 26% |
| > Elementary School | 216 | 63% | 582 | 74% |
| Refused/Don’t Know | 2 | 1% | 3 | 0% |
| Marital Status | ||||
| Single, never married* | 196 | 57% | 299 | 38% |
| Living together, not married | 62 | 18% | 119 | 15% |
| Married | 51 | 15% | 326 | 41% |
| Separated/Divorced/Widowed | 32 | 9% | 47 | 6% |
| Sexual Orientation | ||||
| Straight/Heterosexual | 206 | 60% | 713 | 90% |
| Bisexual | 57 | 17% | 8 | 1% |
| Gay/Homosexual | 68 | 20% | 31 | 4% |
| Refused/Don’t Know | 10 | 3% | 39 | 5% |
*
One respondent who answered “don’t know” was included in the single, never married category.