Table 3.

Normality of the data distribution using Shapiro-Wilk test

	First-time donors			Regular donors (>30 times)
Parameters	Shapiro-Wilk			Shapiro-Wilk
	Statistic	Sig.	Normality	Statistic	Sig.	Normality
WBC	0.908	0.269	Normal	0.955	0.724	Normal
CD34+cells	0.920	0.357	Normal	0.682	0.001	Non-normal
Neutrophils	0.913	0.374	Normal	0.870	0.151	Normal
Lymphocytes	0.934	0.552	Normal	0.909	0.347	Normal
Monocytes	0.928	0.495	Normal	0.949	0.697	Normal
Viability	0.825	0.029	Non-normal	0.818	0.024	Non-normal
Age	0.883	0.143	Normal	0.945	0.613	Normal