From: Increased standardized incidence ratio of breast cancer in female electronics workers
Variables | No. | % |
---|---|---|
First Employment | Â | Â |
   Before 20 June 1974 | 8,461 | 13.2 |
   20 June 1974–16 February 1976 | 6,778 | 10.6 |
   16 February 1976–21 November 1978 | 12,624 | 19.7 |
   After 21 November 1978 | 36,119 | 56.5 |
Age at first employment | Â | Â |
   < 20 years old | 36,370 | 56.8 |
   ≥ 20 years old | 27,612 | 43.2 |
Duration of Employment | Â | Â |
   < 1 month | 13,496 | 21.1 |
   1–11 months | 20,969 | 32.9 |
   1–4 years | 11,504 | 18.0 |
   5–9 years | 4,655 | 7.3 |
   ≥ 10 years | 13,358 | 20.9 |
Accumulated Person-years for Different Durations of Employment | Â | Â |
   < 1 month | 271,056 | 19.3 |
   1–11 months | 471,828 | 33.6 |
   1–4 years | 294,683 | 21.0 |
   5–9 years | 158,847 | 11.3 |
   ≥ 10 years | 207,410 | 14.8 |
Cancer Sites | Â | Â |
   Total (1979–2001) | 1,572 | 100.0 |
   Lip, Oral Cavity and Pharynx | 59 | 3.8 |
   Digestive Organs and Peritoneum | 247 | 15.7 |
   Respiratory System | 60 | 3.8 |
   Breast | 385 | 24.5 |
   Genital Organs | 585 | 37.2 |
   Urinary Organs | 21 | 1.3 |
   Other and Unspecified Sites | 167 | 10.6 |
   Lymphatic and Hematopoietic Tissue | 48 | 3.1 |