Table 7.

Univariable analysis results using log-transformed, averaged PBDE serum concentration (ng/g lipid) as the outcome or dependent variable.

BDE-183
	Electronic Scrap (N = 18)				All Industries (N = 91) *
Covariate or Independent Variable	N	Estimate (SE)	P-value	Factor †	N	Estimate (SE)	P-value	Factor †
Time-weighted average (TWA) air, ng/m3	18	81.4 (44.1)	0.084	2.2×1035	37	76.2 (38.1)	0.054	1.2×1033
Hand wipe post, ng/sample	18	0.03 (0.02)	0.149	1.03	27	0.03 (0.02)	0.089	1.03
Age, years	18	0.03 (0.02)	0.141	1.03	91	0.02 (0.01)	0.049	1.02
BMI, kg/m2	18	0.01 (0.04)	0.838	1.01	91	0.01 (0.01)	0.380	1.01
Length of working time, years	18	0.18 (0.11)	0.131	1.20	91	0.03 (0.02)	0.116	1.03
Hands wash					91
No					26	Ref
Yes					65	0.23 (0.22)	0.307	1.26
BDE-209
	Electronic Scrap (N = 18)				All Industries (N = 91) *
Covariate or Independent Variable	N	Estimate (SE)	P-value	Factor †	N	Estimate (SE)	P-value	Factor †
Time-weighted average (TWA) air, ng/m3	18	2.93 (3.25)	0.380	18.7	37	1.47 (1.88)	0.440	4.35
Hand wipe post, ng/sample	18	0.0003 (0.0001)	<0.001	1.0003	27	0.0003 (0.0001)	<0.001	1.0003
Age, years	18	−0.003 (0.01)	0.789	0.997	91	0.001 (0.01)	0.841	1.001
BMI, kg/m2	18	−0.01 (0.03)	0.761	0.99	91	0.001 (0.03)	0.979	1.001
Length of working time, years	18	0.12 (0.08)	0.154	1.13	91	0.001 (0.01)	0.965	1.001
Hands wash					91
No					26	Ref
Yes					65	0.15 (0.19)	0.420	1.16

^*Industry was adjusted for in the models. Red p-values are significantly higher.

^†Exponent of the estimate. E.g., Interpretation of the factor=1.03 is that for every increment that, after adjusting for industry, if hand wipe post concentration increases by one ng/sample, BDE-183 increases by 1.03 ng/g lipid.