marginally significantp =0.0508
The difference of Hb between normal expression of CD55 and 10% deficiency was also significant (δ=−1.4392 g/dl, 95%CI : −2.6356 to −0.2428 g/dl , p =0.0189), while between normal expression and 25% deficiency was marginally significant (δ=−1.5924 g/dl, p =0.0508, Mann-Whitney test).