Table 1

Squared Correlation Coefficients Obtained for Commonly Used Assay Methods in the Biochemistry Laboratory, Department of Pathology,Magee-Women’s Hospital, Pittsburgh, May 1994

Analyte	R2	Low Conc	High Conc	Rank	Method	Class
HDL	0.9523	5	45	1	Ektachem	NA
Total Bilirubin	0.9873	0	18	2	Ektachem	NA
Albumin	0.9878	2	6	3	Ektachem	NA
Cholesterol	0.9882	25	375	4	Ektachem	NA
Sodium	0.9970	100	155	5	Ektachem	A
Phenobarbital	0.9972	5	60	6	TDX	A
Amylase	0.9974	50	325	7	Ektachem	A
Theophylline	0.9975	7.5	40	8	Ektachem	A
Total Protein	0.9975	4	10	9	Ektachem	A
Dilantin	0.9976	4.5	32	10	TDX	A
BUN	0.9977	10	90	11	Ektachem	A
LDH	0.9978	300	1800	12	Ektachem	A
Digoxin	0.9978	0.5	4.5	13	ACS	A
Alkaline Phosphatase	0.9984	75	700	14	Ektachem	A
ALT	0.9984	30	750	15	Ektachem	A
Gentamycin	0.9987	1	9	16	TDX	A
Triglyceride	0.9989	20	450	17	Ektachem	A
GGTP	0.9990	100	900	18	Ektachem	A
Magnesium	0.9991	0.5	5.5	19	Ektachem	A
Creatinine	0.9991	0.5	11	20	Ektachem	A
Glucose	0.9994	50	450	21	Ektachem	A
Total CPK	0.9995	82	768	22	Ektachem	A
Potassium	0.9995	2	10	23	Ektachem	A
Uric Acid	0.9996	1	12	24	Ektachem	A
Phosphorus	0.9996	0.5	7	25	Ektachem	A
Calcium	0.9997	5	14	26	Ektachem	A
Chloride	0.9998	75	125	27	Ektachem	A
AST	0.9999	50	700	28	Ektachem	A