Table 1. Descriptive analysis of the number of γH2AX foci per cell.

Donor	Non-irradiated			1h post-irradiation				2h post-irradiation						24h post-irradiation
	Mean	SD	N		Mean	SD	N	Mean		SD		N		Mean		SD		N
Young donors (YDs)	0.90	2.52	6152		16.16	7.85	2777		11.43		8.22		4046	1.41	2.33		5633
YD48R(16)	0.91	2.17	957		10.63	5.94	464		7.64		7.04		923	1.21	2.04		1000
YD240L(19)	0.71	2.64	1975		15.42	7.32	389		13.25		7.62		685	0.87	1.87		1000
YD168R(19)	0.78	2.60	809		17.13	7.34	357		8.05		6.38		740	0.58	1.40		879
YD184(21)	0.79	2.13	1000		15.04	6.89	470		12.87		8.02		752	1.05	1.72		1000
YD59L(23)	1.05	2.21	1000		19.75	7.22	609		16.17		7.15		511	2.87	2.75		956
YD123(27)	1.93	3.64	411		17.9	8.60	488		14.30		9.91		435	1.98	3.10		798
Aged donors (ADs)	2.03	3.85	4702		21.17	11.85	3616		13.79		9.52		3800	2.77	4.62		4730
AD153L(60)	0.78	2.30	998		17.36	9.00	895		13.72		8.61		733	2.08	2.85		996
AD112R(61)	2.20	3.57	770		16.31	9.75	780		14.18		8.34		671	2.33	5.18		996
AD122L(66)	2.68	4.91	984		21.45	11.15	588		9.33		6.71		822	5.38	6.85		484
AD29(68)	1.48	2.26	707		22.38	8.04	656		13.97		7.13		799	2.03	2.31		1000
AD429ER(72)	3.43	4.57	483		27.72	13.31	361		19.14		11.82		252	3.10	3.83		353
AD353P(72)	2.30	4.29	760		32.7	16.31	336		16.16		13.33		615	3.29	5.58		901