Table 2.

Linearity under dilution for the automated measurement of adenosine deaminase isoenzyme 2 (ADA2). Results were obtained from two pools of serum from dogs and pigs and two pools of saliva from dogs, horses, pigs and cows with high and low ADA2 activity

Species	Sample	ADA2 (IU/L)	Slope	Y-intercept	R2	P
Dog	Saliva	3.90	1.14 ± 0.07	−0.04 ± 0.08	0.98	< 0.001
		0.64	1.35 ± 0.15	−0.02 ± 0.03	0.95	< 0.001
	Serum	1.79	1.14 ± 0.10	−0.01 ± 0.05	0.95	< 0.001
		0.98	1.16 ± 0.14	−0.01 ± 0.05	0.94	< 0.01
Horse	Saliva	4.77	1.00 ± 0.12	−0.15 ± ± 0.17	0.91	< 0.001
		0.66	1.02 ± 0.05	0.05 ± 0.04	0.99	< 0.001
Pig	Saliva	6.06	1.02 ± 0.03	0.00 ± 0.05	0.99	< 0.001
		0.67	1.04 ± 0.13	−0.04 ± 0.04	0.92	< 0.001
	Serum	4.30	1.38 ± 0.06	−0.35 ± 0.07	0.99	< 0.001
		0.91	1.34 ± 0.13	−0.21 ± 0.06	0.95	< 0.001
Cow	Saliva	2.20	1.65 ± 0.14	0.06 ± 0.09	0.96	< 0.001
		0.56	1.41 ± 0.21	−0.05 ± 0.04	0.92	< 0.01

R²: Coefficient of linear regression; P: P value