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. 2014 Jun 24;111(5):998–1003. doi: 10.1038/bjc.2014.358

Table 2. Maternal occupational exposure in different time periods relative to the birth of their child.

  Exposure time period Cases/controls OR 95% CI
All solvents combined
Any time before birth Non-exposed 262/856 1.00 ref.
  Exposed 31/79 1.16 0.71–1.90
In the year before birth Non-exposed 287/918 1.00 ref.
 
Exposed
6/17
1.19
0.42–3.35
Benzene
Any time before birth Non-exposed 280/899 1.00 ref.
  Exposed 13/36 0.94 0.45–1.97
In the year before birth Non-exposed 291/931 1.00 ref.
 
Exposed
2/4
2.36
0.22–25.7
Other aromatics
Any time before birth Non-exposed 279/887 1.00 ref.
  Exposed 14/48 0.66 0.31–1.38
In the year before birth Non-exposed 289/926 1.00 ref.
 
Exposed
4/9
1.51
0.37–6.16
Aliphatics
Any time before birth Non-exposed 267/876 1.00 ref.
  Exposed 26/59 1.29 0.74–2.27
In the year before birth Non-exposed 288/921 1.00 ref.
 
Exposed
5/14
1.20
0.38–3.81
Chlorinated
Any time before birth Non-exposed 289/932 1.00 ref.
  Exposed 3/4 8.79 0.96–80.7
In the year before birth Non-exposed 293/935
  Exposed 0/0

Abbreviations: CI=confidence interval; OR=odds ratio.

All models are adjusted for frequency-matching variables (child's sex, age at diagnosis, and state of residence), best parental education and occupational exposure to diesel exhaust.