Table 1. Patient demographics and disease characteristics.

Sample seta	Number of samples	Male/Female	Age range	Age (Mean ± SD)	M-protein (g/dL) (Mean ± SD)
Healthy controls	108	67/41	21–66	46 ± 9	Below cut off
MGUS patientsb	103	50/53	41–88	66 ± 12	0.65±0.41

^a All serum samples were from Caucasian people. Clinical data were collected at the time of diagnosis.

^b MGUS encompasses serum samples of the following isotypes: IgG κ (38), IgA κ (12), IgM κ (7), IgG λ (27), IgA λ (13), IgM λ (2), IgG κ + IgM κ (1), IgG κ + IgM λ (1), IgA κ + IgA λ (1), IgM κ + IgM λ (1).