There was no significant association observed between those GPs who believed that aggressive treatment (prostatectomy and/or radiotherapy) or those who believed that non-aggressive treatment (watchful waiting and/or hormone therapy) was more appropriate for the treatment of prostate cancer, and the likelihood of PSA testing asymptomatic men (OR 0.93 95%CI = 0.68,1.28). The gene discussed is KLK3; the disease is prostate carcinoma.