Table 3.

Concordance of plasma RAS testing between NGS and BEAMing dPCR (n = 61).

	Plasma ctDNA RAS Status by dPCR
	RAS	Mutant	WT	Total	PPA	NPA	OPA
Plasma ctDNA RAS status by NGS	Mutant	26	1	27	100 × 26/35 = 74.3%	100 × 25/26 = 96.2%	100 × 51/61 = 83.6%
	WT	9	25	34
	Total	35	26	61

ctDNA: circulating tumor DNA; dPCR: digital PCR; NGS: Next-generation sequencing; WT: Wild type; PPA: Positive percent agreement; NPA: Negative percent agreement; OPA: Overall percent agreement.