A i in 2 sample taken from a general practice of 2,800 was studied to ascertain the prevalence of hyperlipidaemia, hypertension, and smoking, all shown by prospective studies to be risk factors in coronary disease. A lipoprotein analysis by membrane filtration and nephelometry was performed on all subjects. The male subjects of this samplefrom the age group 30 to 69 years have been compared wit...