Occupation* | N total†(14 119) | N cases (897) | HR‡ | 95% CI | HR adj.§ | 95% CI |
White-collar workers¶ | 9860 | 669 | 1.27 | (1.09 to 1.47) | 1.25 | (1.06 to 1.47) |
Blue-collar workers** | 4194 | 225 | 1.0 | - | 1.0 | - |
0. Professional, technical and related work | 4522 | 294 | 1.06 | (0.92 to 1.21) | 1.00 | (0.86 to 1.15) |
00. Engineering work | 242 | 20 | 1.33 | (0.85 to 2.07) | 1.38 | (0.88 to 2.15) |
04. Health and nursing work | 1732 | 106 | 0.97 | (0.79 to 1.19) | 0.99 | (0.80 to 1.22) |
040. Registered nurses | 420 | 38 | 1.48 | (1.07 to 2.05) | 1.51 | (1.08 to 2.08) |
05. Educational work | 1326 | 98 | 1.22 | (0.99 to 1.50) | 1.12 | (0.90 to 1.40) |
052. Teachers of theoretical subjects†† | 260 | 26 | 1.57 | (1.06 to 2.32) | 1.37 | (0.90 to 2.05) |
09. Other professional, technical and related work | 684 | 43 | 1.00 | (0.73 to 1.35) | 0.90 | (0.66 to 1.24) |
1. Administrative and managerial work | 475 | 35 | 1.19 | (0.85 to 1.67) | 1.14 | (0.80 to 1.62) |
10. Government legislative and administrative work | 204 | 17 | 1.39 | (0.86 to 2.25) | 1.20 | (0.72 to 2.00) |
11. Business administrative and other technical and economical administrative work | 271 | 18 | 1.05 | (0.66 to 1.67) | 1.08 | (0.67 to 1.75) |
2. Bookkeeping and clerical work | 4017 | 276 | 1.14 | (0.99 to 1.31) | 1.14 | (0.99 to 1.32) |
20. Bookkeeping and cashier’s work | 909 | 58 | 1.00 | (0.77 to 1.30) | 1.08 | (0.83 to 1.42) |
29. Clerical and related work | 3108 | 218 | 1.16 | (1.00 to 1.35) | 1.14 | (0.97 to 1.34) |
3. Sales work | 1820 | 102 | 0.88 | (0.72 to 1.08) | 0.90 | (0.73 to 1.11) |
33. Other sales work | 1600 | 92 | 0.91 | (0.73 to 1.13) | 0.93 | (0.75 to 1.17) |
4. Agricultural, forestry and fishing work | 103 | 7 | 1.07 | (0.51 to 2.25) | 1.18 | (0.56 to 2.49) |
5. Mining and quarrying work | 0 | 0 | - | - | - | - |
6. Transportation and communications work | 712 | 40 | 0.88 | (0.64 to 1.21) | 0.88 | (0.64 to 1.22) |
65. Postal service and telecommunications work | 509 | 22 | 0.68 | (0.44 to 1.03) | 0.64 | (0.41 to 0.99) |
7–8. Production work | 1309 | 75 | 0.95 | (0.75 to 1.21) | 0.96 | (0.75 to 1.23) |
71. Sewing work | 437 | 17 | 0.65 | (0.40 to 1.05) | 0.63 | (0.37 to 1.05) |
88. Packing, freight handling and storage work | 227 | 15 | 1.09 | (0.65 to 1.81) | 1.08 | (0.63 to 1.83) |
90–94. Service work | 2877 | 163 | 0.88 | (0.74 to 1.04) | 0.93 | (0.78 to 1.11) |
91. Housekeeping and related service work | 1548 | 84 | 0.84 | (0.67 to 1.05) | 0.89 | (0.70 to 1.12) |
92. Waiters and waitresses | 203 | 14 | 1.11 | (0.66 to 1.89) | 1.13 | (0.65 to 1.96) |
93. Caretaking and cleaning work | 694 | 39 | 0.89 | (0.65 to 1.23) | 0.95 | (0.68 to 1.34) |
94. Other service work | 381 | 21 | 0.88 | (0.57 to 1.36) | 0.91 | (0.58 to 1.42) |
98. Armed forces | 4 | 0 | - | - | - | - |
99. Workers reporting occupations unidentifiable or inadequately described | 180 | 9 | 0.76 | (0.40 to 1.47) | 0.84 | (0.44 to 1.63) |
*Occupational group coded according to FOB80 (Population and Housing Census 1980). All occupational sectors at main level (1-digit) are presented and occupational groups larger than 100 women at 2-digit level and occupational groups at 3-digit level larger than 100 women, which showed significantly elevated/reduced HRs.
†The same women can be included up to three times. 14 119 women had 16 013 working periods longer than 10 years.
‡HR for breast cancer in each respective occupation versus all other occupations. Adjusted for age.
§Adjusted for age, parity, age at first child, months of breast feeding per child, hormonal replacement therapy, physical activity, alcohol consumption, height and body mass index.
¶White-collar workers: occupational sectors 0, 1, 2, 3.
**Blue-collar workers: occupational sectors 4, 5, 6, 7–8, 90–94, 98.
††Theoretical subjects are subjects that do not demand physical involvement, for example, natural and social sciences, languages and maths.
HR > 1.29
HR 1.20–1.29
HR 1.10–1.19
HR 1.00–1.09
HR 0.90–0.99
HR 0.80–0.89
HR 0.70–0.79
HR < 0.69