Table 1.

Group characteristics of study participants.

	Fresh blood healthy controls	Recent cryo healthy controls	Long-term cryo healthy controls	Long-term cryo viraemic HIV+	‡p-values
Number	16	20	19	12	NA
Donor age	46.3 ± 12.6	*43.4 ± 11.9	59.9 ± 15.8	47.2 ± 10.2	0.0319
Cryo (years)	N/A	0.29 ± 0.26	24.0 ± 0.26	26.9 ± 0.4	<0.0001
Viability	N/A	94.2 ± 3.5%	90.8 ± 6.7%	87.7 ± 8.8%	0.0612
Recovery	N/A	78.9 ± 22.0%	141 ± 34.8%	135 ± 65.7%	<0.0001

Data expressed as mean ± SD. NA, not applicable. *Estimate based on a subset of donors (n=6); age data not available from other anonymous donors. ^‡Kruskal–Wallis test comparing recent with long-term cryopreserved PBMC groups.