Blood Donors’ Age, Haemoglobin Type, G6PD Status, and Blood Group Impact Storability of CPDA-1 Banked Whole Blood: A Repeated-Measure Cohort Study in Cape Coast, Ghana

Table 4

Stratification based on the age group.

Variable	Days					value
	Day 0	Day 7	Day 14	Day 21	Day 35
Plasma K+ levels
16–19 yrs	4.035	9.995	14.680	17.410	23.55	<0.0001
≥20 yrs	4.180	10.890	15.250	20.130	25.780	<0.0001
value	ns	ns	ns	ns	ns
Osmotic-induced lysis
16–19 yrs	ND	79.570	50.500	38.060	48.550	<0.0001
≥20 yrs	ND	89.780	55.810	38.440	56.940	0.0079
value		ns	ns	ns	ns
Free haemoglobin
16–19 yrs	ND	0.000	0.000	0.5800	0.900	<0.0001
≥20 yrs	ND	0.000	0.5590	0.7190	0.811	0.0002
		ns	ns	0.0078	ns

ND means not determined; ns means not significant; median value significantly differed from day 0 (K+ levels), or day 7 (for osmotic fragility or % free haemoglobin); ns means not statistically significantly different; statistical significance was estimated per each age group in relation to days of storage by means of Friedman’s repeated measure test with Dunn’s multiple correction; across the two age groups, statistical differences within each day was calculated using the Mann–Whitney test.