Table 4.
Estimated incidence among repeat donors by blood center, 2008–2010
| Donor Characteristics | Total # of donations |
# of Confirmed positive |
Total Person Time in Peron-years |
Incidence per 100,000 person-years (95% CI) |
|---|---|---|---|---|
| Total | 329,603 | 60 | 651954.7 | 9 (7–12) |
| Blood Center | ||||
| Kunming | 82,731 | 22 | 163641.9 | 13 (8–20) |
| Urumqi | 50,661 | 11 | 100207.5 | 11 (5–19) |
| Luo Yang | 88,876 | 1 | 175796.7 | 1 (0–3) |
| Liuzhou | 62,832 | 19 | 124281.7 | 15 (9–24) |
| Mianyang | 44,503 | 6 | 88026.9 | 7 (3–15) |
| Age in Years | ||||
| <= 25 years | 118859 | 24 | 235103.1 | 10 (7–15) |
| 26– 35 | 90345 | 23 | 178702.4 | 13 (8–19) |
| 36– 45 | 85445 | 11 | 169010.2 | 7 (3–12) |
| 46+ | 34953 | 2 | 69137.0 | 3 (0–10) |
| Gender | ||||
| Female | 128427 | 15 | 254028.6 | 6 (3–10) |
| Male | 201174 | 46 | 397922.2 | 12 (8–15) |
| Ethnicity | 0 | |||
| Han | 288933 | 48 | 571509.5 | 8 (6–11) |
| Others | 39803 | 12 | 78730.3 | 15 (8–27) |
| Education | ||||
| Middle School | 80085 | 19 | 158408.1 | 12 (7–19) |
| High School Graduated | 70538 | 12 | 139524.2 | 9 (4–15) |
| Technician Certificate | 40024 | 6 | 79167.5 | 8 (3–16) |
| Associate Degree | 73304 | 16 | 144995.3 | 11 (6–18) |
| Complete university & above | 58091 | 7 | 114904.0 | 6 (2–13) |