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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
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BMC Public Health

ISSN: 1471-2458

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