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Table 1 Demographic characteristics of adolescent boys from Chapaevsk, Russia (N = 30)

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

  Mean SD N %
Age (years) 16.1 0.81   
Body Mass Index (kg/m 2 ) 19.9 3.09   
Weeks of Gestation a 39.2 2.37   
Breastfeeding duration of index son (weeks) b 36.9 25.2   
Prior maternal breastfeeding (weeks) b 18.1 38.3   
Birth weight (gm) c 3433 439   
Current residential distance to Khimprom factory (km) 4.45 1.76   
Time boy resided in Chapaevsk(yrs) 14.0 3.70   
Gravidity d     
0    14 48
1    8 28
2–3    7 24
Parity d     
0    17 59
1    10 34
2–3    2 7
Monthly family income level     
   300–1000 rubles ($10–$35 U.S.)    8 28
   1000–1500 rubles ($35–$50 U.S.)    7 24
   >1500 rubles (> $50 U.S.)    14 48
Maximum parental education level     
8–11 th grade    2 7
Junior College    17 59
University    8 28
  1. aOne subject was missing data on weeks of gestation of the index son.
  2. bOne subject was missing data on breastfeeding. Prior maternal breastfeeding is the cumulative number of weeks of breastfeeding children born prior to the index son.
  3. cTwo subjects were missing data on birth weight of the index son.
  4. d Maternal gravidity is the number of pregnancies prior to the index son and parity is the number of live births prior to the index son.