Thirty five people (1.2%, 95% CI = 0.83% to 1.66%) reported having used a cancer related self test kit: 8 had used a faecal occult blood test (FOB) (0.3%), 13 had used a test for haematuria (0.4%), and 16 had used a PSA test (0.5% or 1.1% of males). The gene discussed is KLK3; the disease is cancer.