In 1963, 10,059 men aged forty years and over were examined in an I.H.D. survey and 9,711 of them were re-examined two years later. At both these examinations suspect diabetics werescreened out by a casual blood glucose value and/or a positive history of diabetes. Further information was collected on all these suspect diabetics to enable their classification into diabetic categories using similar criteria on both occasions.
Among 9,079 persons judged at risk of developing diabetes, 144 new cases of diabetes were discovered two years after the 1963 examination. The over-all two-year incidence rate for men over forty was 15.5 per thousand. Four regions of origin, Central Europe, Southeastern Europe, Israel and North Africa had incidence rates approximately equal to the over-all rate. The age adjusted incidence rate for men from Eastern Europe was lower (8.5 per 1,000) and from the Middle East higher (20.3 per 1,000) than the average.