Table 5

Temporal trends in organochlorine levels measured in serum samples of Norwegian women, 1973–1990

Pesticide or pesticide metabolite, or PCB congeners by Wolff groupMean lipid-adjusted concentration (ng/g lipid) by yr of sampleaP for trend test
1973–1975 (n = 83)1976 (n = 70)1977–1982b (n = 60)1985–1990 (n = 85)
B-HCCH81.380.171.419.30.001
Heptachlor epoxide10.19.48.04.20.0002
Oxychlordane13.710.911.56.10.0002
Trans-nonachlor13.910.210.49.50.0002
p-p′-DDE189016321031444.40.04
p,p-DDT225.3163.8103.419.80.004
Group 170.367.767.353.40.001
Group 2A146.6127.9132.474.50.001
Group 2B55.155.452.043.70.0007
Group 2 (total)199.6180.1183.6117.10.002
Group 3455.2446.6426.0345.40.006
Total PCBs890.2848.4839.0622.70.010
  • a Cut points were selected to yield approximately equal numbers of samples in each interval.

  • b There were no blood samples collected in 1983 and 1984.