A computer-assisted staged system of a follow-up of factory workers with CHD and diabetes mellitus was developed. It included automated screening by questionnaire, ECG and biochemical screening, physical examination, investigation of the basic carbohydrate-lipid indices, more detailed examination in out- or inpatients settings using up-to-date diagnostic methods (bicycle ergometry, monitoring after Holter, etc.), identification of groups for a follow-up, and therapeutic and sanitary measures. A total of 27750 persons were investigated. The most important group was that including persons with risk factors: vegetovascular dystonia developing into CHD (6%) or essential hypertension (20%). Sanitary measures by unified methods caused a decrease in temporary disability with the economic effect of 197,000 rubles.