Table 2.

Characteristics of patients included in NPP

Patient	Initial IgM level, mg/dL	IgM subtype	Monospecific Coombs test (at NPP start)	Cold agglutinin titer (at NPP start)
001	1720	κ and suspected λ	Anti-IgG–, anti-IgM++, anti-C3c+, anti-C3d+++	1:>1024
002	163	Suspected κ	Anti-IgG–, anti-IgM–, anti-C3d++	1:32
003	229	κ	Anti-IgG–, anti-IgM–, anti-C3d++	1:>1024
004	121	Suspected κ	Anti-IgG–, anti-IgM–, anti-C3d++	1:>1024
005	93	Paraprotein not excludable	Anti-IgG+, anti-IgM++, anti-C3d+++	1:256
006	22.5	No signs of paraprotein	Anti-IgG–, anti-IgM+, anti-C3d+++	1:256
007	NA	NA	Anti-IgG–, anti-IgM–, anti-C3d++	1:>1024

IgM level normal range, 40-230 mg/dL.

NA, not available.