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Table 1 Demographics of individual plateletpheresis donors across 14 successive cross-sections in Guangzhou Blood Center (N = 135,851)

From: The apheresis platelet donation was increased after a nationwide ban on family/replacement donation in China

  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)
  1. Bold cross-sections denote the ones after the ban on FRD
  2. a“None” = no blood donation history; “WB” = whole blood donation history only; “PLT” = plateletpheresis donation history only; “Both” = both whole blood and plateletpheresis donations history