Table V.
Associations of Years of Employment for Selected Occupations Started 20 Years Ago with Prevalent and Incident Breast Cancer, Shanghai, 1997-2000
| <10 years |
10-19 years |
20+ years |
|||||
|---|---|---|---|---|---|---|---|
| Prevalent Cases | Cases | OR (95% CI) | Cases | OR (95% CI) | Cases | OR (95% CI) | P for trend |
| Technicians in engineering, agriculture and forestry (031-049) | 2 | 1.0 (0.2-3.9) | 9 | 1.5 (0.7-3.0) | 18 | 1.7 (1.0-2.8) | 0.03 |
| Teaching personnel (111-119) | 7 | 1.1 (0.5-2.3) | 25 | 1.7 (1.1-2.7) | 38 | 1.5 (1.0-2.2) | 0.005 |
| Service workers (511-519) | 2 | 0.6 (0.1-2.4) | 3 | 0.8 (0.2-2.4) | 7 | 2.1 (1.0-4.6) | 0.30 |
| Tailoring and sewing workers (771-779) | 3 | 1.3 (0.4-4.2) | 3 | 0.9 (0.3-2.9) | 9 | 2.3 (1.1-4.6) | 0.04 |
| Food and beverage production workers (781-789) | 4 | 3.2 (1.1-9.2) | 2 | 1.8 (0.4-7.6) | 2 | 1.1 (0.3-4.6) | 0.29 |
| Pipeline workers, welders, and metal component installers (881-889) | 1 | 0.4 (0.06-3.2) | 7 | 2.2 (1.0-4.8) | 5 | 1.8 (0.7-4.4) | 0.06 |
| Examiners, measurers, and testers (961-969) | 11 |
2.4 (1.3-4.5)
|
14 |
1.2 (0.7-2.1) |
18 |
1.4 (0.9-2.3) |
0.057 |
|
Incident Cases
| |||||||
| Medical and health care personnel (071-089) | 3 | 1.1 (0.3-3.5) | 4 | 0.7 (0.3-1.9) | 33 | 1.7 (1.2-2.5) | 0.02 |
| Postal and telecommunication workers (331-339) | 2 | 4.6 (1.1-19.8) | 1 | 1.3 (0.2-9.2) | 2 | 1.9 (0.5-8.2) | 0.19 |
| Purchasing and marketing personnel (421-429) | 1 | 2.6 (0.3-20.1) | 2 | 1.1 (0.3-4.6) | 8 | 1.9 (0.9-4.0) | 0.08 |
| Service workers (511-519) | 3 | 0.7 (0.2-2.1) | 7 | 1.8 (0.8-3.9) | 6 | 1.9 (0.8-4.4) | 0.07 |
ORs adjusted for education levels, age at menarche, age at first live birth, number of live births, and menopausal status by strata of two match variables of age at diagnosis and year of birth.