Table 1.

Selected characteristics [reported as frequency (%) unless otherwise noted] of BEEA participants by MGUS status.

Characteristic	MGUS	No MGUS	$p$-Value
Overall	129	1,509
Age at blood draw (y) [median (IQR)]	69 (62–78)	64 (57–72)	$<0.001$a
50–59	23 (18)	502 (33)
60–69	42 (33)	537 (36)
70–79	44 (34)	380 (25)
$\ge 80$	20 (16)	90 (6)
State			0.06b
Iowa	91 (71)	1,174 (78)
North Carolina	38 (29)	335 (22)
Race			0.52c
White	128 (99)	1,475 (98)
Black	1 (1)	13 (1)
Other/missing	0 (0)	21 (1)
MGUS isotype
IgG	81 (63)
IgA	17 (13)
IgM	23 (18)
Biclonald	8 (6)

Notes: BEEA, Biomarkers of Exposure and Effect in Agriculture study; Ig, immunoglobulin; IQR, interquartile range; MGUS, monoclonal gammopathy of undetermined significance.

^aWilcoxon rank-sum test.

^bChi-square test.

^cFisher’s exact test.

^dIncludes two IgG biclonal, three IgG and IgA biclonal, and three IgG and IgM biclonal.