Table 3.

Distribution of selected characteristics within quintiles of BMI-gain from age 30 years to reference age (n= 1,008), LIBCSP, 1996-1997

Characteristic (median or %)Quintile of BMI change from age 30 y to reference age (range in kg/m2)
1 (−6.5 to 0.7)2 (0.7-2.5)3 (2.5-4.4)4 (4.4-7.3)5 (7.4-27.6)
Reference age (y)5055565859
BMI20-gain (kg/m2)0.62.64.87.112.1
BMI30-gain (kg/m2)01.73.45.710.2
% Increase ([current BMI − BMI30] / BMI30)07.815.425.945.3
Current BMI (kg/m2; reference age)21.522.825.127.433.3
Current weight (kg)56.761.268.072.688.0
Current body fat (kg)*15.918.823.327.238.2
% Current body fat*2831343743
Organochlorine compound levels in serum
    DDE (ng/g lipid)578581696746730
    PCB (ng/g lipid)414388195374322
    DDE (μg/L)3.33.54.44.94.9
    PCB (μg/L)2.42.32.52.42.2
    Total lipids (g/L)5.896.016.516.476.80
Lactation history (% in quintile)
    Never (n = 651)1919202022
    1-56 wk (n = 268)2121182317
    >56 wk (n = 89)2427251113
n201203201202201
  • * Estimated using data and equations from Frankenfield et al. (49).

  • Computed using the equation of Akins et al. (47).