Table 2.

PP1α Assay 3-Day Variability and Performance Statistics

Class	Day	Plate	Maximum/Minimum	Mean	SD	CV	Z′	S:B
Intraplate	1	1	Maximum	3,250	109	3.35
		2	Maximum	3,250	178	5.48
		3	Minimum	388	16.8	4.32
		4	Minimum	382	11.6	3.05
		All					0.83	8.44
	2	1	Maximum	3,460	83.2	2.40
		2	Maximum	3,470	64.7	1.86
		3	Minimum	317	5.21	1.64
		4	Minimum	307	11.7	3.80
		All					0.92	11.1
	3	1	Maximum	3,090	68.4	2.21
		2	Maximum	3,040	84.5	2.78
		3	Minimum	336	5.67	1.69
		4	Minimum	313	6.71	2.15
		All					0.90	9.48
Interplate	1	1 & 2	Maximum	3,250	147	4.53
		3 & 4	Minimum	385	14.7	3.82
	2	1 & 2	Maximum	3,470	74.6	2.15
		3 & 4	Minimum	312	10.3	3.30
	3	1 & 2	Maximum	3,070	80.3	2.62
		3 & 4	Minimum	324	13.0	4.00
Day to day	1&2	All	Maximum	3,360	160	4.77
			Minimum	348	38.7	11.1
	2&3	All	Maximum	3,270	216	6.60
			Minimum	318	13.3	4.18
	1&3	All	Maximum	3,160	150	4.74
			Minimum	355	33.3	9.39