Table 3.
Hazard ratios (HR) and 95% confidence intervals (CI) for selected cancers among male agricultural workers in CanCHEC (1991–2010)
| Cancer Site (ICD-O-3) | Agricultural Workers | Farmers and managers | Manual labourers | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Cases | HR | (95% CI)a | Cases | HR | (95% CI)a | Cases | HR | (95% CI)a | |
| Any cancerb | 7295 | 0.95 | (0.93–0.98) | 5415 | 0.94 | (0.92–0.97) | 1880 | 0.98 | (0.93–1.02) |
| Prostate (C61.9) | 2625 | 1.11 | (1.06–1.16) | 2025 | 1.12 | (1.07–1.17) | 600 | 1.08 | (0.99–1.17) |
| Lung (C34) | 995 | 0.75 | (0.70–0.80) | 690 | 0.69 | (0.64–0.75) | 305 | 0.90 | (0.81–1.01) |
| Colon (C18, C26.0) | 640 | 0.89 | (0.82–0.97) | 485 | 0.90 | (0.82–0.99) | 155 | 0.88 | (0.75–1.03) |
| Rectum (C19.9, C20.9) | 440 | 1.05 | (0.95–1.16) | 340 | 1.09 | (0.97–1.22) | 100 | 0.94 | (0.77–1.15) |
| Non-Hodgkin Lymphomac | 500 | 1.10 | (1.00–1.21) | 375 | 1.11 | (0.99–1.24) | 125 | 1.09 | (0.91–1.30) |
| Bladder (C67) | 430 | 0.82 | (0.74–0.91) | 325 | 0.83 | (0.73–0.93) | 105 | 0.82 | (0.67–1.00) |
| Melanoma (C44) | 275 | 1.15 | (1.02–1.31) | 215 | 1.21 | (1.05–1.39) | 60 | 1.00 | (0.77–1.29) |
| Leukemiac | 265 | 1.11 | (0.97–1.27) | 200 | 1.14 | (0.98–1.32) | 65 | 1.03 | (0.80–1.32) |
| Oral (C00-C14) | 250 | 1.04 | (0.91–1.19) | 170 | 0.97 | (0.82–1.14) | 80 | 1.24 | (0.99–1.55) |
| Lip (C00.0-C00.9) | 110 | 2.14 | (1.70–2.70) | 90 | 2.25 | (1.75–2.90) | 20 | 1.80 | (1.15–2.84) |
| Kidney (C64.9) | 230 | 0.77 | (0.67–0.89) | 175 | 0.78 | (0.67–0.92) | 55 | 0.74 | (0.57–0.97) |
| Stomach (C16) | 225 | 0.90 | (0.78–1.04) | 160 | 0.87 | (0.74–1.03) | 65 | 0.99 | (0.77–1.26) |
| Pancreas (C25) | 175 | 0.90 | (0.77–1.06) | 125 | 0.86 | (0.71–1.03) | 50 | 1.03 | (0.77–1.36) |
| Multiple myelomac | 135 | 1.15 | (0.95–1.38) | 100 | 1.14 | (0.92–1.41) | 35 | 1.17 | (0.84–1.64) |
| Brain (C70-C72) | 110 | 0.89 | (0.73–1.08) | 75 | 0.84 | (0.66–1.06) | 35 | 1.01 | (0.72–1.41) |
| Esophagus (C15) | 95 | 0.87 | (0.70–1.08) | 65 | 0.78 | (0.60–1.00) | 30 | 1.15 | (0.80–1.65) |
| Thyroid (C73.9) | 60 | 1.05 | (0.79–1.38) | 45 | 1.06 | (0.77–1.47) | 15 | 1.00 | (0.59–1.70) |
| Larynx (C32) | 55 | 0.54 | 0.41–0.71) | 30 | 0.39 | (0.27–0.56) | 25 | 0.96 | (0.64–1.43) |
| Liver (C22.0, C22.1) | 45 | 0.51 | (0.38–0.68) | 30 | 0.43 | (0.30–0.62) | 15 | 0.75 | (0.47–1.20) |
| Testis (C62) | 30 | 0.97 | (0.69–1.37) | 20 | 1.02 | (0.66–1.56) | 10 | 0.90 | (0.52–1.56) |
| Hodgkin Lymphomac | 25 | 0.78 | (0.49–1.25) | 15 | 0.66 | (0.36–1.22) | 10 | 1.02 | (0.51–2.07) |
| Mesotheliomac | 20 | 0.57 | (0.36–0.90) | 15 | 0.56 | (0.33–0.95) | 5 | 0.59 | (0.24–1.43) |
| Breast (C50) | 20 | 1.27 | (0.74–2.15) | 10 | 0.96 | (0.48–1.91) | 10 | 2.08 | (0.97–4.44) |
| Nasal (C30) | 15 | 0.71 | (0.39–1.29) | 10 | 0.77 | (0.38–1.53) | 5 | 0.60 | (0.22–1.65) |
| Bone (C40, C41) | 5 | 0.69 | (0.36–1.32) | <5 | - | - | <5 | - | - |
Note: case counts below 5 have been suppressed and all counts have been randomly rounded to base 5 in accordance with Statistics Canada disclosure rules
aAdjusted for age at baseline (age group categories), province of residence at baseline, and education level at baseline
bIncident primary cancers excluding non-melanoma skin cancer
cCancers defined using ICD-O-3 Histology codes: Mesothelioma (9050–9055), Hodgkin lymphoma (9650–9667); non-Hodgkin lymphoma (9590–9596,9670–9719, 9727–9729, 9823, 9827); Multiple myeloma (9731,9732,9734); Leukemia (9733, 9742, 9800–9801, 9805, 9820, 9826, 9831–9837, 9840, 9860–9861, 9863, 9866–9867, 9870–9876,9891,9895–9897,9910, 9920, 9930–9931, 9940, 9945–9946, 9948, 9963–9964, 9823, 9827)