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Table 6 Multivariate models for predicting log sum of dioxina concentrations among adolescent boys in Chapaevsk, Russia

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

Model # Predictor Estimate p-value R-square value Adjusted R-square value
1 Consumption of local non-chicken eat (y/n) 0.59 0.017 0.56 0.52
  log (PCB 118) (ng/g lipid) 0.63 <0.001   
2 Age (years) 0.40 <0.001 0.56 0.46
  Weeks of gestation -0.11 0.005   
  Consumption of local dairy (y/n) -0.76 0.037   
  Consumption of local non-chicken meat (y/n) 0.90 <0.001   
  Monthly family income level (ordinal, low, med, high) -0.27 0.020   
  1. Abbreviations: Log, logarithm base 10
  2. aSum of dioxin-like compounds includes PCDDs, PCDFs, and coplanar PCBs
  3. N = 26 for model 1; N = 29 for model 2. Missing data for 3 boys on lipid-adjusted PCB 118, and one boy on questionnaire items (medical history, diet).
  4. Model 1: best fit multivariate model including PCB 118 data.
  5. Model 2: best fit multivariate model (forward and backward selection) not including PCB 118.