Table 5.

Predictors of log dioxin TEQs^a among boys in Chapaevsk, Russia (adjusted for age).

Predictor	Estimate	p-value	Multiplicative factor on dioxin (95% CI)	R-Square Value
Age (years)	0.26	0.14	1.30 (0.93–1.81)	0.08
BMI (kg/m2)	0.04	0.41	1.04 (0.95–1.13)	0.10
Consumption of local non-chicken meat (y/n)	0.68	0.059	1.97 (1.01–3.87)	0.20
Consumption of local chicken (y/n)	0.06	0.82	1.07 (0.62–1.83)	0.08
Consumption of local Fish (y/n)	0.36	0.32	1.43 (0.71–2.88)	0.11
Consumption of local Eggs (y/n)	0.12	0.68	1.13 (0.64–1.98)	0.09
Consumption of local Dairy (y/n)	-0.43	0.44	0.65 (0.22–1.89)	0.10
Consumption of local Fruits/Vegetables (y/n)	0.35	0.65	1.41 (0.32–6.17)	0.09
Current residential distance from Khimprom (km)	-0.09	0.32	0.91 (0.77–1.09)	0.12
Years resided in Chapaevsk	-0.014	0.71	0.99 (0.92–1.06)	0.09
Monthly family income levelb	-0.14	0.41	0.87 (0.63–1.21)	0.10
Maximum parental educationb	0.41	0.086	1.50 (0.96–2.36)	0.18
log (PCB118 TEQ)	0.96	<0.001	2.61 (1.81–3.75)	0.57
Sexual delay/congenital abnormality	0.21	0.46	1.23 (0.71–2.13)	0.10
Parityb,c	0.06	0.77	1.06 (0.73–1.54)	0.09
Weeks of gestation	-0.11	0.078	0.90 (0.80–1.01)	0.19
Breast-feeding duration of index son (per 12 weeks)	-0.002	0.97	1.00 (0.87–1.14)	0.08
Prior breastfeeding durationd (years)	0.07	0.72	1.07 (0.73–1.57)	0.08

Abbreviations: Log, logarithm base 10; BMI, body mass index; TEQ, toxic equivalents

^aSum of dioxin TEQs include TEQs for PCDDs, PCDFs, coplanar PCBs and other 'dioxin-like' PCBs

^bEach variable was modeled using three ordinal levels.

^cParity refers to the number of live births prior to the index son.

^dPrior maternal breastfeeding refers to the cumulative number of weeks of breastfeeding children born prior to the index son.

N = 30 for age, BMI, and distance from Khimprom at time of blood draw; N = 29 for all food consumption and medical history predictors; N = 27 for model with PCB118.