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. 2011 Sep;38(Suppl 1):1–72.
Donation Frequency Category Number of Donors Mean Change in Platelet Count × 103/μl Median Change in Platelet Count × 103/μl
20–40 50 +8.60 +8.5

41–80 50 +14.40 +12.5

81–120 35 +23.80 +14.0

> 120 9 +35.30 +36.0

Overall 144 +15.98∗∗ +14.0

p < 0.05

∗∗

p < 0.01