Appendix

Number and percentage of subjects with laboratory values below LOD,a judged unreliable, or missing values for the organochlorine and PCB analyses, Long Island Breast Cancer Study Project, 1996–1997

CompoundTotal no.Subjects below LODbSubjects with unreliable valuescSubjects with missing valuesd
n%n%n%
DDE107090.840050.47
DDT105990.8500242.27
BZ5696031332.6011011.46202.08
BZ6699721121.1611011.03151.50
BZ741037959.160070.68
BZ821046837.930000
BZ99103210710.3700212.03
BZ101103213913.4700353.39
BZ105105638836.7400181.70
BZ118e1061100.940000
BZ138f1061211.9800131.23
BZ146104134933.5300161.54
BZ153g106100.0000141.32
BZ15695831733.090020.21
BZ167105668965.250030.28
BZ170105712311.640080.76
BZ174106150947.970010.09
BZ178105662859.470040.38
BZ177106045743.110010.09
BZ180106160.5700141.32
BZ183105733731.880030.28
BZ1871061252.360030.28
BZ201105924523.140000
BZ203106027525.940000
Oxychlordane104811010.500080.76
Trans-nonachlor1027626.0400141.36
Mirex86660669.9800495.66
Dieldrin329133.950000
  • a LOD, limits of detection.

  • b Limits of detection were 0.2 for DDE and DDT, 0.07 for PCB congeners, and 0.009 for dieldrin.

  • c Coded as 888 by laboratory [M.S.W.].

  • d Coded as 999 by laboratory [M.S.W.].

  • e Missing BZ118 values were imputed for one subject.

  • f Missing BZ138 values were imputed for 78 subjects.

  • g Missing BZ153 values were imputed for nine subjects.