The reported investigations were carried out in 3424 men working in large industrial plants of the City of Wrocław and 222 men with strokes treated in the Department of Neurology, Medical Academy in Wrocław. The frequency of such risk factors was determined as obesity, hypertension, hyperlipidaemia, smoking, carbohydrate metabolism disturbances. A statistically significant increase was demonstrated in the frequency of hypertension and hyperlipidaemia in the group with strokes as compared with the control group.