Table 3

Multiple linear regression analyses for the associations between urine bisphenol A (BPA) concentration (ng/mL) and body mass index (BMI, Kg/m2) among study participants
Group Crude analysisa Adjusted model 1b Adjusted model 2c
β d (95% CI) β (95% CI) β (95% CI)
All 0.019 (0.002, 0.035) 0.018 (0.004, 0.032) 0.017 (0.002, 0.032)
P = 0.027 P = 0.011 P = 0.026
Age (years)
  8-11 0.010 (-0.010, 0.030) 0.020 (0.001, 0.038) 0.017 (-0.002, 0.037)
P = 0.330 P = 0.041 P = 0.081
  12-15 0.013 (-0.012, 0.039) 0.020 (-0.003, 0.044) 0.019 (-0.005, 0.044)
P = 0.306 P = 0.088 P = 0.118
Sex
  Female 0.021 (-0.001, 0.043) 0.020 (0.002, 0.038) 0.015 (-0.004, 0.034)
P = 0.065 P = 0.028 P = 0.115
  Male 0.017 (-0.008, 0.042) 0.016 (-0.007, 0.038) 0.018 (-0.005, 0.041)
P = 0.188 P = 0.164 P = 0.123

Abbreviation: CI (confidence interval).

aIncluded a variable of urine BPA corrected for specific gravity.

bNot corrected urine BPA concentrations by specific gravity and included the covariables of age and sex.

cCorrected urine BPA concentrations by specific gravity and included the covariables of age and sex.

dRegression coefficient.

Wang et al.

Wang et al. Environmental Health 2012 11:79   doi:10.1186/1476-069X-11-79

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