Table 1 Comparisons of demographic, antecedent personal medical, general pesticide exposures and cigarette smoking history between cases of NHL and control subjects based on the postal questionnaire
|
NHL, n = 517
|
Controls, n = 1506
|
ORa (95% CI) |
| n |
% |
n |
% |
|
| Age, yr |
|
|
|
|
|
| <30 |
64 |
12.4 |
356 |
23.6 |
|
| 30–39 |
87 |
16.8 |
255 |
16.9 |
|
| 40–49 |
111 |
21.5 |
238 |
15.8 |
|
| 50–59 |
143 |
27.7 |
370 |
25.6 |
|
| >60 |
112 |
21.7 |
287 |
19.0 |
|
| Mean ± SD |
57.7 ± 14 |
|
55.0 ± 16 |
|
|
| Residence on a farm at any time |
|
|
|
|
|
| Yes |
235 |
45.5 |
673 |
44.7 |
|
| No (reference) |
279 |
54.0 |
828 |
55.0 |
1.06 (0.86–1.20) |
| Missing |
3 |
0.6 |
5 |
0.3 |
|
| Pesticide exposure (screening question) |
|
|
|
|
|
| <10 h/yr (reference) |
379 |
73.3 |
1142 |
75.8 |
|
 10 h/yr |
138 |
26.7 |
364 |
24.2 |
1.22 (0.96–1.55) |
| Smoking History |
|
|
|
|
|
| Nonsmoker (reference) |
160 |
30.9 |
526 |
34.9 |
|
| Ex-smoker |
254 |
49.1 |
648 |
43.0 |
1.10 (0.86–1.41) |
| Current smoker |
91 |
17.6 |
298 |
19.8 |
0.98 (0.72–1.33) |
| Missing data |
12 |
2.3 |
34 |
2.3 |
|
| Current or ex-smoker |
345 |
66.7 |
946 |
62.8 |
1.06 (0.86–1.20) |
| Medical Historyb |
|
|
|
|
|
| Measles (yes) |
251 |
48.5 |
888 |
59.0 |
0.64 (0.51–0.79) |
| Mumps (yes) |
194 |
37.5 |
588 |
39.0 |
0.75 (0.60–0.93) |
| Previous cancer (yes) |
73 |
14.1 |
87 |
5.8 |
2.43 (1.71–3.44) |
| Skin-prick allergy test |
34 |
6.6 |
196 |
13.0 |
0.52 (0.34–0.76) |
| Allergy desensitization shots (yes) |
18 |
3.5 |
114 |
7.6 |
0.49 (0.29–0.83) |
| Family history of cancer any first- degree relative (yes) |
219 |
42.4 |
497 |
33.0 |
1.31 (1.05–1.62) |
|
a OR stratified by age and by province of residence.
b Also tested and found to be unassociated: acne; asthma; celiac disease; chickenpox; diabetes; hay fever; mononucleosis; rheumatic fever; rheumatoid arthritis; ringworm; shingles; syphilis; tuberculosis; urinary tract infections; whooping cough; allergies; drug treatment for overactive thyroid; treatment for head lice, body lice, or scabies; medical implants; drug treatment for epilepsy; tonsillectomy; positive allergy prick skin test, patch skin test, or positive patch skin test for allergy.