Table 1 Distribution of demographic and socioeconomic characteristics of cases and controls
Variable | % cases (n = 178) | % controls (n = 356) | OR (95%CI) |
|---|---|---|---|
Age (years) | Â | Â | Â |
   18–21 | 6.2 | 15.4 | 1.0 |
   22–29 | 21.3 | 26.7 | 2.3 (1.1–5.3) |
   30–39 | 38.2 | 31.5 | 3.5 (1.7–7.8) |
   40–59 | 34.3 | 26.4 | 3.8 (1.8–8.4) |
   P value |  |  | 0.003 |
Schooling (years) | Â | Â | Â |
   12–15 | 13.5 | 27.5 | 1.0 |
   9–11 | 27.5 | 30.1 | 1.8 (1.0–3.4) |
   5–8 | 40.4 | 30.9 | 2.7 (1.6–4.8) |
   0–4 | 18.5 | 11.5 | 3.2 (1.7–6.6) |
   P value |  |  | <0.0001 |
Number of previous donations | Â | Â | Â |
   ≥ 1 | 56.7 | 72.5 | 1.0 |
   None | 43.3 | 27.5 | 2.0 (1.3–3.0) |
   P value |  |  | <0.0001 |