Table 4

RRa of breast cancer recurrence associated with adipose concentrations of organochlorine pesticidesb

Pesticide log (ng/g)N (recurrent, not recurrent)RR95% CI
HCB
 Lowest tertile6, 681.0Ref.
 Middle tertile13, 623.01.1–8.4
 Highest tertile11, 642.30.7–7.4
β-HCH
 Lowest tertile6, 681.0Ref.
 Middle tertile11, 641.70.6–5.1
 Highest tertile13, 622.70.9–8.3
OXC
 Lowest tertile9, 651.0Ref.
 Middle tertile10, 651.30.5–3.1
 Highest tertile11, 641.40.5–4.0
TNC
 Lowest tertile8, 661.0Ref.
 Middle tertile13, 622.00.7–5.3
 Highest tertile9, 662.10.7–6.8
DDE
 Lowest tertile8, 661.0Ref.
 Middle tertile16, 592.30.9–5.7
 Highest tertile6, 691.10.4–3.5
DDT
 Lowest tertile9, 651.0Ref.
 Middle tertile13, 621.20.5–2.9
 Highest tertile8, 671.10.4–3.0
DDD
 Lowest tertile5, 691.0Ref.
 Middle tertile15, 602.20.8–6.1
 Highest tertile10, 652.30.7–8.0
Total pesticides
 Lowest tertile7, 671.0Ref.
 Middle tertile17, 582.51.0–6.4
 Highest tertile6, 691.30.4–4.0
  • a RR, relative risk; CI, confidence interval; HCB, hexachlorobenzene; β-HCH, β-hexachlorocyclohexane; OXC, oxychlordane; TNC, trans-nonachlor; DDE, 1,1-dichloro-2,2-di(4-chlorophenyl)ethylene; DDT, 1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane; DDD, 1,1-dichloro-2-(ortho-chlorophenyl)-2-(para-chlorophenyl)ethane; Ref., referent.

  • b Adjusted for age, body mass index, education, stage of disease, tamoxifen treatment. Tests for trend were not significant.