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Table 1 Exposure coding for silica and asbestos among jobs with probable/certain exposure, NECSS 1994–1997

From: Silica and asbestos exposure at work and the risk of bladder cancer in Canadian men: a population-based case-control study

 Most common exposure coding among occupationally exposed (probable or certain)
SilicaAsbestos
CCDO CodesN (%) jobsN (%) exposedConcentrationFrequencyConfidenceN (%) exposedConcentrationFrequencyConfidence
7111–7199 and 7313–7518Farming, horticulture, animal husbandry occupations; fishing, forestry, logging and related occupations376 (18.7)262 (69.7)Low (100.0%)Medium (89.3%)Probable (100.0%)0 (0.0)
8780–8799 and 9910–9918Construction trades and occupations in laboring and elemental work124 (6.2)61 (49.2)Low (86.9%)Medium (63.9%)Probable (85.3%)10 (8.1)Low (90.0%)Medium (70.0%)Probable (90.0%)
8710–8719Excavating, grading, paving and related occupations in construction34 (1.7)27 (79.4)Low (96.3%)High (74.1%)Certain (77.8%)0 (0.0)
7710–7719Mining and quarrying including oil and gas field occupations38 (1.9)29 (76.3)Medium (62.1%)High (89.7%)Certain (82.8%)2 (5.3)Medium (100.0%)High (100.0%)Certain (100.0%)
8540–8599 and 8178 and 8230–8290 and 9511–9519Product fabricating and assembling occupations (wood, rubber, plastic, textiles) and mechanics and repairers167 (8.3)14 (9.6)Low (64.3%)Medium (92.9%)Certain (78.6%)37 (22.2)Low (97.3%)Medium (89.2%)Probable (100.0%)
9111–9199 and 9539Truck drivers, other transport operating and related occupations157 (7.8)9 (5.7)Low (100.0%)Medium (66.7%)Certain (77.8%)13 (8.3)Low (100.0%)Low (92.3%)Probable (92.3%)
8110–8149 and 8310–8330 and 8510–8529Mineral ore treating occupations and metal processing and related occupations29 (1.4)8 (27.6)High (75.0%)High (100.0%)Certain (100.0%)0 (0.0)
8150–8165 and 8211Clay, glass and stone processing, mixing and blending chemicals and related materials7 (0.4)0 (0.0)0 (0.0)
6111–6119, 6120–6199, 8210–8229 and 8293Protective service occupations, food and beverage preparation and other services occupations204 (10.1)0 (0.0)4 (2.0)Low (100.0%)High (50.0%)Certain (100.0%)
8313–8399Metal, glass, stone and related materials machining occupations42 (2.1)1 (2.4)Medium (100.0%)High (100.0%)Probable (100.0%)4 (9.5)Low (50.0%)Medium (75.0%)Certain (100.0%)
8731–8739 and 8533–8539Electrical, lighting and wiring installation and repair60 (3.0)3 (5.0)Low (100.0%)Low (33.3%)Probable (66.7%)23 (38.3)Low (100.0%)Medium (95.7%)Probable (95.7%)
9311–9318Material handling and related occupations34 (1.7)0 (0.0)1 (2.9)Medium (100.0%)High (100.0%)Definite (100.0%)
9310–9319Stationary auxiliary and utility equipment operators28 (1.4)1 (3.6)   14 (50.0)Low (100.0%)Medium (100.0%)Probable (100.0%)
1111–5199Office workers, managers, executives, academics and professionals in business, sciences, engineering, teaching, health and arts576 (28.6)7 (1.2)Low (85.7%)Medium (57.1%)Probable (71.4%)0 (0.0)
1000, 2000, 5000, and 9000Retired, disabled and/or sick, student, or unknown/never worked138 (6.9)
 Missing4        
Total 2014 (100.0)