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. Author manuscript; available in PMC: 2017 Jun 9.
Published in final edited form as: Environ Res. 2017 Jan 31;154:311–317. doi: 10.1016/j.envres.2017.01.033

Table 1.

Distribution of serum lipid levels at age 8–14 years across background characteristics of 248 ELEMENT participants.

N Total cholesterol (mg/dL) HDL-C (mg/dL) LDL-C (mg/dL) Triglycerides (mg/dL)
Mean ± SD Pa Mean ± SD Pa Mean ± SD Pa Mean ± SD Pa

Overall 248 155.2 ± 28.4 58.7 ± 11.9 79.0 ± 23.2 87.5 ± 44.4
Sociodemographic & family characteristics
Maternal age at enrollment
 15–24 years 101 153.3 ± 30.6 0.34 57.9 ± 12.2 0.47 76.9 ± 24.2 0.23 92.6 ± 47.9 0.51
 25–34 years 116 156.2 ± 25.8 59.5 ± 12.4 80.3 ± 21.9 81.7 ± 39.9
 35–44 years 31 158.2 ± 30.4 58.2 ± 9.3 81.5 ± 24.5 92.7 ± 47.4
Marital status
 Married 177 155.7 ± 30.4 0.64 59.4 ± 11.9 0.12 79.3 ± 24.5 0.75 85.0 ± 43.8 0.11
 Single 71 154.1 ± 22.8 56.9 ± 12.0 78.4 ± 19.6 93.8 ± 45.6
Maternal education
 <10 years 89 153.3 ± 29.0 0.10 57.9 ± 12.5 0.58 77.1 ± 23.5 0.08 91.5 ± 47.9 0.98
 10–12 years 123 154.0 ± 27.2 59.5 ± 12.2 78.3 ± 22.5 81.0 ± 34.5
 >12 years 36 164.1 ± 30.0 57.8 ± 9.5 86.3 ± 23.8 100.2 ± 60.4
Characteristics at the 8–14 year research visit
Sex
 Male 117 151.2 ± 28.5 0.03 59.9 ± 12.0 0.11 75.9 ± 23.9 0.04 77.0 ± 38.3 0.0001
 Female 131 158.8 ± 27.8 57.6 ± 11.8 81.9 ± 22.2 96.9 ± 47.4
BMI z-score
 < −2.0 4 164.5 ± 16.2 0.003 68.3 ± 8.3 0.0001 81.2 ± 15.0 0.0004 75.5 ± 38.3 <0.0001
 ≥ −2.0 to ≤1.0 119 148.9 ± 25.2 61.5 ± 12.4 72.6 ± 21.1 73.8 ± 36.0
 >1.0 to ≤2.0 83 159.7 ± 28.9 55.8 ± 10.7 84.6 ± 22.2 96.6 ± 45.0
 >2.0 42 163.5 ± 33.2 55.5 ± 11.3 86.1 ± 26.8 109.9 ± 52.5
Pubertal status: Malesb
 Prepubertal 56 155.6 ± 26.9 0.17 60.9 ± 11.7 0.35 79.4 ± 21.5 0.20 76.4 ± 39.7 0.80
 Pubertal 58 148.2 ± 29.3 59.0 ± 12.3 73.7 ± 25.6 77.8 ± 38.2
Pubertal status: Femalesb
 Prepubertal 86 165.2 ± 26.6 0.0002 59.1 ± 11.7 0.04 87.1 ± 21.0 0.0002 95.3 ± 49.1 0.34
 Pubertal 45 146.6 ± 26.3 54.6 ± 11.6 72.0 ± 21.3 100.1 ± 44.3
a

Represents a test for linear trend where an ordinal indicator is entered into the model as continuous variable, with the exception of binary variables (Wald test).

b

Prepubertal and pubertal were defined as Tanner stage ≤1 and >1, respectively, for genital or pubic hair development in boys, and for breast or pubic hair development in girls.