Quantification of Cell-Free DNA in Red Blood Cell Units in Different Whole Blood Processing Methods

Table 3

Differences in cfDNA between fresh and older blood.

Assay	Duration of red blood cell storage		value
	Fresh blood; (≤14 days)	Older blood; (>14 days)
cfDNA by PicoGreen; (mean ng/mL ± SD)	0.57 ± 0.93; ()	0.86 ± 0.78; ()	0.33
cfDNA by spectrophotometry; (mean µg/mL ± SD)	3.77 ± 1.66; ()	3.02 ± 1.44; ()	0.0031