Table 1. . Demographics table. Age, race and exposure information for the members of Michigan PBB Registry by sex.

	Males (n = 277)	Females (n = 381)	p-value
Age when sample collected (years)†	58.58 ± 11.96	51.16 ± 12.40	4.44e-14
Age when exposed (years)†	18.54 ± 11.79	12.73 ± 10.73	2.05e-10
Total PBB level (ng/ml)‡	0.69 (5.17)	0.37 (4.14)	4.54e-7
Total PBB level (ng/g lipid)‡	109.99 (5.43)	54.29 (4.29)	3.53e-8
Race/ethnicity§			0.45
White/non-Hispanic	266 (96.03%)	372 (97.64%)
White/Hispanic	11 (3.97%)	9 (2.36%)

^†Mean ± standard deviation.

^‡Geometric mean (standard deviation).

^§Number (percentage).

PBB: Polybrominated biphenyl.