Table 2.

Regression β estimates of serum total DDT with BMI, age, and birth year in women of childbearing age, Anhui, China, 1996 to 1998

VariableTotal DDT(ng/g)
nCrude
Adjusted
β (95%CI)β (95%CI)
BMI (kg/m2)462−1.31 (−2.13 to −0.49)−1.34 (−2.12 to −0.56)
Age (y)4652.51 (1.51-3.51)0.08 (−1.35-1.51)
Birth year465
    4th quartile (8/13/1974-7/16/1977)116ReferenceReference
    3rd quartile (4/6/1973-8/6/1974)1178.54 (4.19-12.89)8.38 (3.91-12.85)
    2nd quartile (3/15/1972-4/5/1973)1179.01 (4.66-13.36)8.54 (3.74-13.34)
    1st quartile (5/24/1963-3/7/1972)11515.92 (11.55-20.29)15.66 (9.43-21.89)
    Birth year test for trend4654.82 (3.43-6.21)4.61 (2.65-6.57)
  • NOTE: Sample sizes ranged from 461 to 465 because of missing BMI, age, or birth year data.