Table 1.
REDS-II Donor Return Behavior, Donation Productivity, and Estimated Future Loss of Red Cell Units with Longer Minimum IDIs
| Characterization at 1st visit during REDS-II |
Donors (N)+ |
RC components (N) |
Median Return Interval > RC* |
% w/ Return Visit** |
Ave. RC/Yr** |
% Donate ≥ 2x/yr** |
% w/ Hb deferral |
N Hb deferrals |
% Estimated Red Cell loss extending interval to |
|||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 12 wks | 16 wks | 20 wks | ||||||||||
| Females | 1,022,099 | 2,303,232 | 17.4 | 57.7 | 0.89 | 13.6 | 26.7 | 460,324 | 2.2 | 5.5 | 8.9 | |
| ≤ 20 yrs | 296,555 | 435,602 | 22.3 | 50.6 | 0.61 | 4.5 | 23.8 | 97,441 | 0.5 | 1.5 | 2.6 | |
| 20+ to 35 | 250,661 | 455,085 | 18.6 | 50.6 | 0.72 | 7.1 | 24.5 | 96,021 | 1.2 | 3.3 | 5.6 | |
| 35+ to 50 | 276,749 | 733,394 | 17.4 | 62.7 | 1.00 | 13.8 | 31.1 | 158,590 | 2.5 | 6.3 | 10.2 | |
| 50+ | 198,134 | 679,151 | 15.4 | 68.9 | 1.26 | 20.6 | 27.8 | 108,272 | 3.6 | 8.7 | 13.7 | |
| Males | 843,698 | 2,713,875 | 16.7 | 59.7 | 1.25 | 23.1 | 2.9 | 41,551 | 3.9 | 8.9 | 13.4 | |
| ≤ 20 yrs | 234,465 | 431,368 | 22.9 | 46.9 | 0.76 | 8.0 | 0.7 | 1,830 | 0.7 | 1.9 | 3.3 | |
| 20+ to 35 | 187,412 | 467,446 | 17.7 | 50.3 | 1.00 | 13.6 | 1.1 | 3,031 | 2.4 | 5.8 | 9.2 | |
| 35+ to 50 | 226,555 | 881,225 | 16.9 | 66.5 | 1.44 | 24.4 | 2.8 | 10,342 | 4.3 | 10.0 | 15.1 | |
| 50+ | 195,266 | 933,836 | 14.7 | 73.3 | 1.70 | 31.5 | 7.5 | 26,348 | 5.6 | 12.8 | 18.6 | |
|
Totals (all donors) |
1,865,797 | 5,017,107 | 17.0 | 58.6 | 1.05 | 14.9 | 16.0 | 501,875 | 3.1 | 7.3 | 11.3 | |
+
Excludes 62,212 donors who donated only platelets or plasma or who made autologous or directed donation at first visit.
*
Median interval until next donor visit following RC donation, in weeks (excludes those who fail to return).
**
Restricted to those with ≥ 1 year observation time (i.e. donated 2006–2008).