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 5

Stratification of data per blood group.

Variable	Day					value
	Day 0	Day 7	Day 14	Day 21	Day 35
Plasma K+ levels
Group A	3.990	10.020	14.790	16.490	22.840	<0.0001
Group B	4.035	10.180	15.240	18.250	24.920	<0.0001
Group O	4.070	10.020	14.080	17.460	23.930	<0.0001
value	ns	ns	ns	ns	ns
Osmotic-induced lysis
Group A	ND	78.840	50.480	36.700	49.660	0.0003
Group B	ND	80.860	45.400	39.740	51.930	<0.0001
Group O	ND	79.360	54.480	37.780	47.750	<0.0001
value		ns	ns	ns	ns
Free haemoglobin
Group A	ND	0.000	0.000	0.316	0.851	<0.0001
Group B	ND	0.000	0.212	0.609	0.912	<0.0001
Group O	ND	0.000	0.000	0.614	0.891	<0.0001
value		ns	ns	ns	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 blood group in relation to days in storage by means of Friedman’s repeated measure test with Dunn’s multiple correction; across the two age groups, statistical differences within each day were calculated using the Kruskal–Wallis test.