Table 1.

Correlation among tumor-infiltrating B subsets (n = 619).

Variable	PCs		CD27+ Sw Bm		CD27− Sw Bm		Bn
	r	P	r	P	r	P	r	P
Training cohort (n = 258)
IgM+ Bm	0.52	<0.001	0.51	<0.001	0.61	<0.001	0.65	<0.001
Bn	0.37	<0.001	0.52	<0.001	0.45	<0.001
CD27− Sw Bm	0.50	<0.001	0.63	<0.001
CD27+ Sw Bm	0.41	<0.001
CD20+ B	0.48	<0.001
Validation cohort (n = 361)
IgM+ Bm	0.66	<0.001	0.39	0.047	0.49	<0.001	0.66	<0.001
Bn	0.50	<0.001	0.53	<0.001	0.50	<0.001
CD27− Sw Bm	0.40	<0.001	0.60	<0.001
CD27+ Sw Bm	0.21	<0.001
CD20+ B	0.52	<0.001

Abbreviation: CD20⁺ B, CD20⁺ B cells; IgM⁺ Bm, IgM⁺ memory B cells; Bn, naïve B cells; CD27⁻ Sw Bm, CD27⁻ isotype-switched memory.

B cells; CD27⁺ Sw Bm, CD27⁺ isotype-switched memory B cells; PCs, plasma cells.Pearson’s correlation test.