Table 3

Insecticides: frequency of exposure to insecticides classified into major chemical classes and as individual compounds

Major chemical classesNHL n = 517Controls n = 1506ORa (95% CI)ORadjb (95% CI)
n exposed% exposedn exposed% exposed
Carbamates,c exposed377.2604.0 1.95 (1.25–3.05) 1.92 (1.22–3.04)
Individual carbamate insecticides
 Carbaryl254.8342.3 2.05 (1.18–3.55) 2.11 (1.21–3.69)
 Carbofuran91.7181.21.58 (0.68–3.67)1.64 (0.70–3.85)
 Methomyl61.2130.91.86 (0.67–5.17)1.65 (0.54–5.03)
Organochlorine, (1)d exposed509.71348.91.16 (0.81–1.66)1.27 (0.87–1.84)
Individual organochlorine (1) insecticides
 Chlordane367.01057.01.06 (0.71–1.59)1.11 (0.74–1.69)
 Lindane152.9231.5 2.05 (1.01–4.16) 2.06 (1.01–4.22)
 Aldrin101.960.4 3.81 (1.34–10.79) 4.19 (1.48–11.96)
Organochlorine (2) diphenylchloridese exposed8616.623315.51.24 (0.94–1.65)1.21 (0.90–1.62)
Individual organochlorine (2) diphenylchlorides
 Methoxychlor6512.620113.31.08 (0.79–1.47)1.02 (0.74–1.41)
 DDT326.2593.9 1.63 (1.03–2.57) 1.73 (1.08–2.76)
Organophosphorus,f exposed9017.416711.1 1.69 (1.26–2.27) 1.73 (1.27–2.36)
Individual organophosphorus insecticides
 Malathion7213.91278.4 1.77 (1.28–2.46) 1.83 (1.31–2.55)
 Dimethoate224.3503.31.20 (0.71–2.03)1.20 (0.70–2.06)
 Diazinon183.5281.91.72 (0.92–3.19)1.69 (0.88–3.24)
  • a ORs calculated with strata for the variables of age and province of residence.

  • b ORs adjusted for statistically significant medical variables (history of measles, mumps, cancer, allergy desensitization shots and a positive family history of cancer in a first-degree relative), and with strata for the variables of age and province of residence.

  • c Carbamate insecticides include carbaryl, carbofuran, and methomyl.

  • d Organochlorine insecticides class one includes aldrin; chlordane; dieldrin; endrin; heptachlor; lindane; and a mixture of lindane, carbathiin, and thiram (Vitavex).

  • e Organochlorine (2) diphenylchloride insecticides include DDT and methoxychlor.

  • f Organophosphorus insecticides include malathion, chlorpyrifos, diazinon, dimethoate, parathion, methidathion, and trichlorfon.