Testicular cancer associated with employment in agriculture and oil and natural gas extraction.

A hospital-based case-control study, involving review of the medical records of 347 patients with histologically confirmed germ-cell tumours of the testis and 347 randomly selected controls with other disorders, demonstrated a significant association between this cancer and work in the agricultural industry. The odds ratio for present farming occupation was 6.27 (95% confidence limits 1.83, 21.49; p less than 0.05). Work in the crude petroleum and natural gas extraction industry also conferred excess risk for this cancer (odds ratio 2.29; CL 1.03, 5.11).