Table 2.

Stability of dry Self-sample brushes, measured as average amplifiable copy number of human genomic sample material.

	Time points (weeks)		4 °C		RT		30 °C
			Mean1	P-value3	Mean	P-value	Mean	P-value
Average huDNA copy number	0–8 weeks	0	1034	0.41	1132	0.61	3923	0.37
		2	1416		1012		3208
		4	3543		912		1078
		8	1013		2013		469
	0–32 weeks	0	3489	0.03	1635	0.54	1216	0.54
		16	680		1184		1222
		32	1005		975		804
2Relative number of 100 bp. fragments	0–8 weeks	0	678	0.44	609	0.91	1157	0.08
		2	744		596		698
		4	669		629		715
		8	573		655		519
	0–32 weeks	0	906	0.05	830	0.05	839	0.00
		16	618		606		595
		32	560		489		463
Relative number of 200 bp. fragments	0–8 weeks	0	252	0.79	190	0.678	748	0.03
		2	250		246		265
		4	324		159		375
		8	193		284		88
	0–32 weeks	0	1163	0.09	485	0.24	299	0.03
		16	111		181		209
		32	214		188		108
Relative number of 300 bp. fragments	0–8 weeks	0	1529	0.36	1387	0.616	3510	0.03
		2	1511		1307		1662
		4	11125		1033		1604
		8	1211		1826		642
	0–32 weeks	0	5018	0.04	2059	0.467	1811	0.69
		16	762		1379		2608
		32	1456		1280		1491
Relative number of 400 bp. Fragments	0–8 weeks	0	1253	0.35	1802	0.884	2990	0.44
		2	1407		1660		11793
		4	2453		1577		1484
		8	1609		2193		683
	0–32 weeks	0	4968	0.03	1905	0.90	1408	0.51
		16	1399		1730		1292
		32	1505		1594		1006
Relative number of 500 bp. fragments	0–8 weeks	0	1459	0.51	1673	0.554	11211	0.25
		2	3168		1261		1623
		4	3158		1168		1267
		8	1480		5129		419
	0–32 weeks	0	5389	0.05	2913	0.59	1735	0.50
		16	509		2025		1424
		32	1304		1337		956

¹Average amplifiable copy numbers

²Overall and relative composition of the sample evaluated as proportion of 100, 200, 300, 400 and 500 bp DNA fragments.

³p=value calculated using the one-way ANOVA test