Table 1 Demographics of individual plateletpheresis donors across 14 successive cross-sections in Guangzhou Blood Center (N = 135,851)
2012/10−2013/3 | 2013/4–2013/9 | 2013/10–2014/3 | 2014/4–2014/9 | 2014/10–2015/3 | 2015/4–2015/9 | 2015/10–2016/3 | 2016/4–2016/9 | 2016/10–2017/3 | 2017/4–2017/9 | 2017/10–2018/3 | 2018/4–2018/9 | 2018/10–2019/3 | 2019/4–2019/9 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Gender | ||||||||||||||
Male, n (%) | 5409 (71.0) | 6176 (71.5) | 5944 (69.3) | 6938 (71.3) | 7371 (72.1) | 8117 (73.0) | 8395 (73.3) | 8968 (77.9) | 8742 (77.0) | 9274 (80.3) | 9042 (78.7) | 4857 (74.9) | 5903 (75.2) | 6238 (75.5) |
Female, n (%) | 2210 (29.0) | 2458 (28.5) | 2638 (30.7) | 2790 (28.7) | 2858 (27.9) | 2995 (27.0) | 3062 (26.7) | 2542 (22.1) | 2604 (23.0) | 2282 (19.7) | 2446 (21.3) | 1624 (25.1) | 1944 (24.8) | 2024 (24.5) |
Age | ||||||||||||||
≤ 35y, n (%) | 5993 (78.7) | 6702 (77.6) | 6698 (78.0) | 7414 (76.2) | 7812 (76.4) | 8523 (76.7) | 9237 (80.6) | 9110 (79.1) | 9055 (79.8) | 9136 (79.1) | 9071 (79.0) | 4722 (72.9) | 5966 (76.0) | 6239 (75.5) |
> 35y, n (%) | 1626 (21.3) | 1932 (22.4) | 1884 (22.0) | 2314 (23.8) | 2417 (23.6) | 2589 (23.3) | 2220 (19.4) | 2400 (20.9) | 2291 (20.2) | 2420 (20.9) | 2417 (21.0) | 1759 (27.1) | 1881 (24.0) | 2023 (24.5) |
Blood donation historya | ||||||||||||||
None, n (%) | 3791 (49.8) | 4166 (48.3) | 4581 (53.4) | 5134 (52.8) | 5615 (54.9) | 5985 (53.9) | 6308 (55.1) | 6129 (53.2) | 5945 (52.4) | 5575 (48.2) | 5718 (49.8) | 1631 (25.2) | 2469 (31.5) | 1913 (23.2) |
WB, n (%) | 906 (11.9) | 1331 (15.4) | 1132 (13.2) | 1519 (15.6) | 1484 (14.5) | 1875 (16.9) | 1810 (15.8) | 1831 (15.9) | 1660 (14.6) | 1665 (14.4) | 1560 (13.6) | 1352 (20.9) | 1429 (18.2) | 1446 (17.5) |
PLT, n (%) | 1793 (23.5) | 1925 (22.3) | 1755 (20.5) | 1880 (19.3) | 1899 (18.6) | 1941 (17.5) | 1971 (17.2) | 2098 (18.2) | 2153 (19.0) | 2526 (21.9) | 2373 (20.7) | 1849 (28.5) | 1874 (23.9) | 2301 (27.9) |
Both, n (%) | 1129 (14.8) | 1212 (14.0) | 1114 (13.0) | 1195 (12.3) | 1231 (12.0) | 1311 (11.8) | 1368 (11.9) | 1452 (12.6) | 1588 (14.0) | 1790 (15.5) | 1837 (16.0) | 1649 (25.4) | 2075 (26.4) | 2602 (31.5) |
FRD in current interval | ||||||||||||||
Yes, n (%) | 2194 (15.4) | 3690 (24.1) | 3654 (24.2) | 4898 (28.9) | 5865 (34.2) | 6720 (36.1) | 6633 (34.7) | 7840 (40) | 7435 (39.2) | 8485 (41.9) | 3677 (18.5) | 0 (0.0) | 0 (0.0) | 0 (0.0) |
No, n (%) | 12,031 (84.6) | 11,634 (75.9) | 11,446 (75.8) | 12,062 (71.1) | 11,303 (65.8) | 11,910 (63.9) | 12,498 (65.3) | 11,765 (60) | 11,513 (60.8) | 11,750 (58.1) | 16,176 (81.5) | 17,742 (100.0) | 22,023 (100.0) | 25,222 (100.0) |