Table 2.

SNP Call Rates (%) on 500K Arrays from gDNA and wgaDNA

			DNA
			gDNA		wgaDNA
Sample	Storage time	Date of collection	NspI	StyI	NspI	StyI
109022 serum	Recent	11/02/2006	—	—	89.1	89.0
109023 serum	Recent	04/17/2007	97.4	97.3	91.4	93.0
109025 serum	Recent	04/17/2007	97.3	97.7	89.0	90.9
0270 plasma	∼3 years	01/12/2004	97.9	97.1	95.4	91.4
0271 plasma	∼3 years	01/12/2004	97.8	97.8	96.1	95.8
0905 serum	∼10 years	02/08/1997			85.1	88.2
8773 serum	∼10 years	03/05/1997			92.6	93.6
0625 serum	∼20 years	09/17/1988			94.1	96.8
0531 plasma	∼20 years–TR	04/04/1987			62.9	65.0
1166 plasma	∼20 years–TR	04/01/1987			79.2	81.6
109023 serum	Recent–5X	04/17/2007			69.7	70.5
109025 serum	Recent–5X	04/17/2007			80.9	81.6

∼20 years–TR, archived samples that were thawed and refrozen for other purposes at least once over time; recent–5X, samples experimentally thawed and refrozen five times to simulate heavy sample usage. NspI arrays contain 262,264 SNPs, StyI arrays contain 238,304 SNPs.