Table 2.

Intra- and Inter-day Accuracy and Precision of VCR and M1 in DBS Samples

Intra-day (N=6)							Inter-day (N=18)
VCR
QC level	Day 1		Day 2		Day 3
ng/ml	Accuracy	Precision	Accuracy	Precision	Accuracy	Precision	Accuracy	Precision
	(%)	(%)	(%)	(%)	(%)	(%)	(%)	(%)
0.6	110.17	5.62	106.85	8.59	108.62	6.32	108.54	6.63
1	109.33	3.78	99.08	6.87	102.20	7.84	103.54	7.29
10	97.83	7.27	96.45	8.23	93.35	6.82	95.88	7.30
80	105.93	8.14	96.15	7.62	93.63	3.60	98.57	8.49
M1 Metabolite
0.4	116.50	1.43	99.95	10.11	117.17	1.91	111.21	8.91
1	111.17	1.05	97.85	6.19	102.48	8.21	103.83	7.72
10	100.33	6.06	99.73	5.48	106.50	3.97	102.19	5.78
80	93.10	4.79	94.87	1.98	111.00	2.93	99.66	8.91