A study of the incidence of Dupuytren's contracture in a control group of the Zaragoza population is presented. In a second part the author studies 398 patients affected by Dupuytren's contracture, and the association with diabetes, epilepsy, cirrhosis, alcoholism and lung diseases. The incidence of Dupuytren's contracture in populations of diabetics, alcoholics, epileptics if also examined.