Predictors of serum dioxin levels among adolescent boys in Chapaevsk, Russia: A cross-sectional pilot study

Table 4 Individual predictors of log sum of dioxin-like compounds^a, adjusted for age in years

Predictor	Estimate	p-value	Multiplicative factor on dioxin (95% CI)	R-Square Value
Age of index son (years)	0.26	0.057	1.30 (1.00–1.72)	0.13
BMI of index son (kg/m²)	0.03	0.40	1.03 (0.95–1.13)	0.15
Consumption of local non-chicken meat (y/n)	0.56	0.042	1.75 (1.05–2.92)	0.26
Consumption of local chicken (y/n)	0.13	0.54	1.14 (0.75–1.72)	0.14
Consumption of local fish (y/n)	0.48	0.079	1.62 (0.97–2.71)	0.23
Consumption of local eggs (y/n)	0.20	0.36	1.23 (0.80–1.88)	0.16
Consumption of local dairy (y/n)	-0.19	0.65	0.82 (0.36–1.89)	0.13
Consumption of local fruits/vegetables (y/n)	-0.12	0.84	0.89 (0.28–2.77)	0.13
Current residential distance from Khimprom (km)	-0.06	0.37	0.94 (0.82–1.07)	0.15
Years resided in Chapaevsk	0.009	0.75	1.01 (0.95–1.07)	0.13
Monthly family income level^b	-0.09	0.50	0.92 (0.71–1.18)	0.14
Maximum parental education^b	0.21	0.26	1.23 (0.86–1.76)	0.17
Log (PCB 118) (ng/g lipid)	0.64	<0.001	1.90 (1.37–2.63)	0.46
Congenital abnormality of index son	-0.015	0.95	0.99 (0.64–1.51)	0.13
Parity^b,c	-0.011	0.94	0.99 (0.74–1.32)	0.13
Weeks of gestation	-0.08	0.072	0.92 (0.84–1.00)	0.23
Weeks of breast-feeding index son (per 12 weeks)	-0.004	0.94	1.00 (0.90–1.10)	0.13
Prior breastfeeding duration^d (years)	0.09	0.53	1.10 (0.82–1.47)	0.14

Abbreviations: Log, logarithm base 10; BMI, body mass index; PCB 118, polychlorinated biphenyl 118
^aSum of dioxin-like compounds includes PCDDs, PCDFs, and coplanar 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.

ISSN: 1476-069X