388 



V. BLOOD LIPIDS 



number of samples of blood; they concluded that the mean value for the 

 ratio was 21.6 ± 2.5 when the average cholesterol concentration was 204.6 

 milligram per cent. It was found that the ratio varied somewhat, under 



Cholesterol, rog. per cent. 



Fig. 1. The relation of blood cholesterol to the ratio, cholesterol -.lipid phosphorus, in 

 the serum of normal persons, psychiatric persons, and patients with diseases of the thy- 

 roid. The crosses on the vertical lines represent the mean values for the ratio in the 

 samples grouped with similar blood-cholesterol values. The cross lines on the vertical 

 lines indicate once or twice the standard deviation, except at the highest cholesterol 

 value, where only the standard deviation is given. 214 



normal and pathological conditions, with changes in blood cholesterol. In 

 general, the values are increased in the presence of higher blood cholesterol 

 figures. 214 These data are represented in Figure 1. 



A formula has also been developed to express the relationship between 

 lipid phosphorus and blood cholesterol, which is a straight-line function 



214 J. P. Peters and E. B. Man, /. Clin. Invest., 22, 715-720 (1943). 



