Table 3 Association of blood lead level quartiles (independent variable) with body mass index (dependent variable).

From: Blood lead level and its association with body mass index and obesity in China - Results from SPECT-China study

Body mass index

Blood lead level, ug/dl

P for trend

Q1

Q2

Q3

Q4

Men

Model 1 (SE)

Ref.

−0.19 (0.20)

−0.11 (0.20)

−0.31 (0.20)

0.19

Model 2 (SE)

Ref.

−0.11 (0.20)

0.13 (0.21)

0.002 (0.21)

0.73

Model 3 (SE)

Ref.

−0.06 (0.19)

0.05 (0.19)

0.01 (0.20)

0.82

Women

Model 1 (SE)

Ref.

−0.11 (0.18)

0.43 (0.18)*

0.89 (0.18)*

<0.001

Model 2 (SE)

Ref.

−0.12 (0.17)

0.30 (0.17)

0.59 (0.18)*

<0.001

Model 3 (SE)

Ref.

−0.12 (0.17)

0.27 (0.17)

0.59 (0.17)*

<0.001

  1. Data are expressed as unstandardized coefficients (standard errors). Linear regression analyses were used. Model 1 was unadjusted. Model 2 included terms for age, rural/urban residence, economic status and current smoking. Model 3 included terms for model 2, diabetes, dyslipidemia and hypertension.
  2. *Denotes statistical significance at P < 0.05.