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. Author manuscript; available in PMC: 2024 Sep 15.
Published in final edited form as: Environ Res. 2023 Jun 20;233:116330. doi: 10.1016/j.envres.2023.116330

Table 1.

Descriptive statistics on 304 boys participating in the Russian Children’s Study with prepubertal phthalate measurements

n = 304 boys
Median Assessments [IQR] 9 [8, 11]
Baseline Demographics
  Age at enrollment, mean (SD) 8.23 (0.42)
  WHO age-adjusted BMI z-score, mean (SD) −0.36 (1.24)
  Total calories consumed per day (kcal), median [IQR] 2551 [2033, 3258]
  Birthweight (kg), mean (SD) 3.26 (0.52)
  Duration of breast feeding (weeks), median [IQR] 13 [4, 26]
  Monthly family income ≤250 USD, n (%) 184 (60.5)
  Highest parental education, n (%) High school or less 27 (9.0)
    Some college or junior college 184 (61.1)
    College graduate 90 (29.9)
Prepubertal Phthalate Concentrations Median [IQR]
Diethyl (DEP) Metabolite, (ng/mL)
   Monoethyl, MEP 91.18 [51.38, 177.30]
Di-n-butyl (DnBP) Metabolite, (ng/mL)
   Mono-n-butyl, MnBP 196.47 [125.38, 301.56]
Diisobutyl (DiBP) Metabolite, (ng/mL)
   Mono-isobutyl, MiBP 57.07 [34.33, 87.66]
Butyl Benzyl (BBzP) Metabolite, (ng/mL)
   Monobenzyl, MBzP 6.19 [2.89, 15.15]
Di(2-ethylhexyl) (DEHP) Metabolites, (ng/mL)
   Mono-(2-ethylhexyl), MEHP 13.21 [7.23, 23.02]
   Mono-(2-ethyl-5-hydroxyhexyl), MEHHP 79.12 [51.00, 121.34]
   Mono-(2-ethyl-5-oxohexyl), MEOHP 65.83 [41.67, 105.30]
   Mono-(2-ethyl-5-carboxypentyl), MCEPP 159.44 [104.85, 260.10]
Di-iso-nonylphthalate (DiNP) Metabolites, (ng/mL)
   Mono-hydroxyisononyl, MHiNP 8.21 [4.93, 14.81]
   Mono-oxo-isononyl, MOiNP 2.90 [1.73, 5.88]
   Mono-carboxy-isononyl, MCOP 6.41 [3.28, 11.86]
Diisodecyl (DiDP) Metabolites, (ng/mL)
   Mono-hydroxy-isodecyl, MHiDP 4.09 [2.09, 8.24]
   Mono-oxo-isodecyl, MOiDP 0.55 [0.30, 0.91]
   Mono-carboxy-isodecyl, MCNP 0.80 [0.52, 1.39]
Other Metabolite, (ng/mL)
   Mono-(3-carboxypropyl), MCPP 11.02 [6.56, 18.89]
Molar Sums, (μmol/L)
   DEHP Metabolites, ΣDEHP 1.08 [0.71, 1.75]
   DiNP Metabolites, ΣDiNP 0.06 [0.03, 0.10]
   DiDP Metabolites, ΣDiDP 0.02 [0.01, 0.03]
   Anti-androgenic phthalates, ΣAA 2.49 [1.59, 3.60]

Means and standard deviations are shown for normally distributed variables. Medians and IQRs are shown for nonnormally distributed variables. SD: Standard Deviation; WHO: World Health Organization; BMI: Body Mass Index; IQR: Interquartile Range; kg: kilograms; ng/mL: Nanograms per milliliter; μmol/L: micromole per liter; Data for some characteristics were not available for all boys: Total calories consumed per day (0.7%), Birthweight (0.3%), Duration of breast feeding (1.6%), and Highest parental education (1%); percentages are calculated based on those with available data.