highly significantp < 0.000
The risk factor analysis showed no significant difference between the two groups of patients undergoing dialysis, while highly significant differences emerged among the three groups in terms of their exposure to scintigraphy (p < 0.000), angiography (p < 0.001), mammography (p < 0.006), mobile phone repeaters (p < 0.012) and chemicals (p < 0.012), as well as cigarette smoking (p < 0.025), wine and beer consumption (both p < 0.000), diabetes (p < 0.000), hypertension (p < 0.000), residential area (p < 0.001), storey of residence (i.e. ground floor, first floor, etc.) (p < 0.016) and level of education (p < 0.000).