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Table 3 Final models derived from two independent overall pseudo-panel datasets – overall GZ set (n = 330 cells) and overall CD set (n = 316 cells)

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

  Overall GZ Seta Overall CD Setb
β SE p β SE p
Intercept 0.8636 0.4643 0.0782 0.9637 0.2180 0.0002
timeBefore11 0.0111 0.0067 0.0976 0.0077 0.0084 0.3582
timeAfter11 0.0404 0.0093 < 0.0001 0.0441 0.0102 < 0.0001
Gender
 male vs. female 1.3370 0.4138 0.0044 0.7449 0.1909 0.0009
Blood donation historyc
 WB vs. None 0.1790 0.5852 0.7630 0.1928 0.2687 0.4816
 PLT vs. None 2.6243 0.5851 0.0003 2.1231 0.2690 < 0.0001
 Both vs. None 3.9440 0.5851 < 0.0001 3.2293 0.2705 < 0.0001
timeAfter11 × gender
 time×male vs. time×female 0.0550 0.0072 < 0.0001 0.0325 0.0086 0.0002
timeAfter11 × history
 time×WB vs. time×none 0.0331 0.0105 0.0018 0.0069 0.0120 0.5655
 time×PLT vs. time×noned 0.0698 0.0104 < 0.0001 0.1373 0.0120 < 0.0001
 time×Both vs. time×noned 0.0444 0.0104 < 0.0001 0.0507 0.0120 < 0.0001
  1. aModel equation for Overall GZ set can be drew as: average apheresis platelet units per donor = 0.8630 + 0.0111*timeBefore11 + 0.0404*timeAfter11 + 1.3370*(gender = male) + 0.0000*(gender = female) + 0.1790*(history = WB) + 2.6242*(history = PLT) + 3.9440*(history = Both) + 0.0000*(history = None) + 0.0550*timeAfter11*(gender = male) + 0.0000*timeAfter11*(gender = female) + 0.0331*timeAfter11*(history = WB) + 0.0698*timeAfter11*(history = PLT) + 0.0444*timeAfter11*(history = Both) + 0.0000*timeAfter11*(history = None)
  2. bModel equation for Overall CD set can be drew as: average apheresis platelet units per donor = 0.9637 + 0.0077*timeBefore11 + 0.0441*timeAfter11 + 0.7449*(gender = male) + 0.0000*(gender = female) + 0.1928*(history = WB) + 2.1231*(history = PLT) + 3.2293*(history = Both) + 0.0000*(history = None) + 0.0325*timeAfter11*(gender = male) + 0.0000*timeAfter11*(gender = female) + 0.0069*timeAfter11*(history = WB) + 0.1373*timeAfter11*(history = PLT) + 0.0507*timeAfter11*(history = Both) + 0.0000*timeAfter11*(history = None)
  3. c“None” = no blood donation history; “WB” = whole blood donation history only; “PLT” = plateletpheresis donation history only; “Both” = both whole blood and plateletpheresis donations history
  4. dThe difference of the outcome change between time*PLT and time*Both was tested using Z = abs(β2– β1)/SQRT (SE12 + SE22), α = 0.05, one-tailed. For overall GZ set: Z = 1.727, p = 0.0421; for overall CD set: Z = 5.103, p < 0.0001
  5. Bold values denote statistical significance