Table 3

Duration of exposure as a farmer and machinist and risk of NHL

Duration (in years)
NHL (N = 513)
Control (N = 1506)
OR (95% CI)a

n (%)
n (%)


Job Title: Farmer



No exposure
427 (83.2)
1276 (84.7)
1.00
<10 years
36 (7.0)
124 (8.2)
0.84 (0.51, 1.41)
10–20 years
7 (1.4)
23 (1.5)
1.40 (0.57, 3.43)
> 20 years
43 (8.4)
83 (5.5)
1.55 (1.02, 2.36)c

Job Title: Machinist



No exposure
491 (95.7)
1457 (96.7)
1.00
<10 years
10 (1.9)
33 (2.2)
0.75 (0.30, 1.88)
10–20 years
2 (0.4)
4 (0.3)
1.77 (0.31, 10.22)
> 20 years
10 (1.9)
12 (0.8)
2.33 (1.00, 5.52)c

a all odds ratios were adjusted for age and province of residence.

c Statistically significant results are bold.

Karunanayake et al. Environmental Health 2008 7:44   doi:10.1186/1476-069X-7-44