Table 1.

Equations to convert DBS EPA + DHA (x) into the Omega-3 Index (RBC EPA + DHA %) (y) by species.

Species	Equation	R2	O3I Equivalent of a DBS EPA + DHA of 4%	Approximate Range of O3I Values
Dog (n = 33)	y = 0.709x + 0.0002	0.98	2.9%	0.3 to 7%
Cat (n = 10)	y = 0.690x + 0.0014	0.96	2.9%	0.5 to 4%
Human (n = 100)	y = 1.114x + 0.014	0.88	5.9%	2 to 12%