Table 9

Distribution of numbers of exposures to multiple types of pesticides among cases and controls

NHLControlsORa (95% CI)
n%n%
Multiple herbicide use
 Unexposedb37472.3114876.21.00
 Exposed 1458.71469.71.02 (0.70–1.47)
 Exposed 2–47314.115110.0 1.75 (1.27–2.42)
 Exposed ≥5254.8614.11.41 (0.84–2.35)
Multiple insecticide use
 Unexposed37071.6115476.61.00
 Exposed 1448.51278.41.24 (0.85–1.80)
 Exposed 2–48616.618912.6 1.58 (1.17–2.13)
 Exposed ≥5173.3362.41.46 (0.79–2.69)
Multiple fungicide use
 Unexposed45788.4136190.41.00
 Exposed 1326.2906.01.08 (0.70–1.67)
 Exposed ≥2285.4553.71.61 (.99–2.63)
Multiple fumigant use
 Unexposed48794.2144095.61.00
 Exposed ≥1305.8664.41.45 (0.91–2.63)
Multiple pesticide usec
 Unexposed35769.1109572.71.00
 Exposed 1–47714.923015.31.09 (0.81–1.46)
 Exposed ≥58316.118112.0 1.57 (1.16–2.14)
  • a ORs calculated with strata for the variables age and province of residence.

  • b With the exception of the variable multiple pesticide use, the “unexposed” referent category is specific to the class of pesticides.

  • c The unexposed referent category contains those who did not report exposure to herbicides, insecticides, fungicides, or fumigants.