DERMATITIS
Background
What is dermatitis?
Key Findings
Here are some key findings…
Relative Incidence by Industry and Occupation
FIG1. Incidence of dermatitis diagnoses among workers employed in each industry group relative to all others, Occupational Disease Surveillance System (ODSS), 1999-2016

The hazard ratio is an estimate of the average time to diagnosis among workers in each industry/occupation group divided by that in all others during the study period. Hazard ratios above 1.00 indicate a greater incidence of disease in a given group compared to all others. Estimates are adjusted for birth year and sex. The width of the 95% Confidence Interval (CI) is based on the number of cases in each group (more cases narrows the interval).
FIG2. Incidence of dermatitis diagnoses among workers employed in each occupation group relative to all others, Occupational Disease Surveillance System (ODSS), 1999-2016

The hazard ratio is an estimate of the average time to diagnosis among workers in each industry/occupation group divided by that in all others during the study period. Hazard ratios above 1.00 indicate a greater incidence of disease in a given group compared to all others. Estimates are adjusted for birth year and sex. The width of the 95% Confidence Interval (CI) is based on the number of cases in each group (more cases narrows the interval).
Table of Results
Table1. Surveillance of Dermatitis: Number of cases, workers employed, and hazard ratios in each industry (SIC)
SIC Code * | Industry Group | Number of cases | Number of workers employed | Hazard Ratio (95% CI) † |
1 | Agriculture | 214 | 7,686 | 0.76 (0.67, 0.87) |
2/3 | Forestry, Fishing and Trapping |
33 | 1,333 | 0.72 (0.51, 1.02) |
4 | Mines, Quarries and Oil Wells |
80 | 2,938 | 0.81 (0.65, 1.01) |
5 | Manufacturing | 4,254 | 106,619 | 1.11 (1.07, 1.14) |
6 | Construction | 1,315 | 49,098 | 0.78 (0.74, 0.83) |
7 | Transportation, Communication and Other Utilities |
1,621 | 46,208 | 0.96 (0.92, 1.01) |
8 | Trade | 3,878 | 105,536 | 0.95 (0.92, 0.99) |
9 | Finance, Insurance and Real Estate |
188 | 5,194 | 0.91 (0.79, 1.05) |
10 | Community, Business and Personal Service |
7,311 | 170,758 | 1.02 (0.99, 1.05) |
11 | Public Administration and Defense |
1,821 | 45,567 | 1.00 (0.96, 1.05) |
* SIC: Standard Industrial Classification (1970) | ||||
† Hazard rate in each group relative to all others |
Table2. Surveillance of Dermatitis: Number of cases, workers employed, and hazard ratios in each occupation (CCDO) group
CCDO Code * | Occupation Group | Number of cases | Number of workers employed | Hazard Ratio (95% CI) † |
11 | Managerial, administrative and related |
498 | 11,973 | 0.98 (0.89, 1.07) |
21 | Natural sciences, engineering and mathematics |
283 | 7,203 | 1.06 (0.94, 1.19) |
23 | Social sciences and related fields |
532 | 10,389 | 1.13 (1.04, 1.23) |
25 | Religion | <5 | 43 | — |
27 | Teaching and related | 888 | 17,718 | 1.09 (1.02, 1.17) |
31 | Medicine and health | 1,731 | 40,325 | 0.90 (0.85, 0.94) |
33 | Artistic, literary, recreational and related |
241 | 5,215 | 1.17 (1.03, 1.33) |
41 | Clerical and related | 1,999 | 45,733 | 1.04 (0.99, 1.09) |
51 | Sales | 1,862 | 46,968 | 0.96 (0.92, 1.01) |
61 | Service | 3,852 | 91,788 | 1.03 (1.00, 1.07) |
71 | Farming, horticultural and animal husbandry |
350 | 11,817 | 0.81 (0.73, 0.91) |
73 | Fishing, hunting, trapping and related |
10 | 168 | 1.03 (0.46, 2.29) |
75 | Forestry and logging | 33 | 1,110 | 0.87 (0.61, 1.22) |
77 | Mining and quarrying, including oil and gas field |
50 | 1,818 | 0.82 (0.62, 1.09) |
81 | Processing (mineral, metal, chemical) |
514 | 13,255 | 1.05 (0.96, 1.14) |
82 | Processing (food, wood, textile) |
831 | 19,613 | 1.09 (1.02, 1.17) |
83 | Machining and related | 1,143 | 29,146 | 1.14 (1.07, 1.21) |
85 | Product fabricating, assembling and repairing |
2,075 | 53,765 | 1.08 (1.03, 1.13) |
87 | Construction trades | 1,318 | 47,847 | 0.81 (0.77, 0.86) |
91 | Transport equipment operating |
1,286 | 38,990 | 0.94 (0.89, 1.00) |
93 | Materials handling and related, not elsewhere classified |
890 | 24,050 | 1.04 (0.97, 1.11) |
95 | Other crafts and equipment operating |
154 | 3,481 | 1.20 (1.03, 1.41) |
99 | Other occupations not elsewhere classified | 1,263 | 34,642 | 1.01 (0.95, 1.07) |
* CCDO: Canadian Classification Dictionary of Occupations (1971) | ||||
† Hazard rate in each group relative to all others |