Table 1. Socio-demographic characteristics of blood donors in study areas, March-July 2011.
| Study population N = 809 | General population N = 24,509 | |
|---|---|---|
| Residence; No. (%) | ||
| Brazzaville | 509 (62.9) | 11,962 (48.8) |
| Pointe-Noire | 225 (27.8) | 10,014 (40.9) |
| Rural areas | 75 (9.3) | 2,533 (10.3) |
| Gender | ||
| Male/Female | 608/201 | 18,906/5,603 |
| Gender ratio | 3.02 | 3.37 |
| Age, y | ||
| Mean | 32.89 | - |
| Median | 31 | - |
| Range | 18–63 | 18–65 |
| SD | 10.21 | - |
| Age groups; No. (%) | ||
| ≤ 29 y | 370 (45.7) | - |
| 30–39 y | 238 (29.4) | - |
| 40–49 y | 130 (16.1) | - |
| 50+ y | 71(8.8) | - |
| Occupation; No. (%) | ||
| Health professional | 88 (10.9) | - |
| Office worker | 64 (7.9) | - |
| Military | 105 (13.0) | - |
| Unemployed | 214 (26.5) | - |
| Student | 169 (20.9) | - |
| Hunter | 17 (2.1) | - |
| Cultivator | 15 (1.9) | - |
| Farmer | 17 (2.1) | - |
| Manual labourer | 120 (14.8) | - |
| Household size; No. (%) | ||
| 1–5 | 439 (54.3) | - |
| 6–10 | 303 (37.5) | - |
| ≥ 11 | 67 (8.3) | - |
| Type of house; No. (%) | ||
| Modern | 723 (89.4) | - |
| Traditional | 86 (10.6) | - |