Cis-5,8,11,14,17-eicosapentaenoic acid (C20:5n3) to LysoPC 20:2 ratio (Experimental Factor Ontology identifier EFO_0021680) is quantification of the ratio of Cis-5,8,11,14,17-eicosapentaenoic acid (C20:5n3) to LysoPC 20:2 ratio in a sample.