SYSTOLIC BLOOD-PRESSURE AND THE PULSE RATE. 481 



CONCLUSIONS. 



1. The mean blood-pressure in temperate climates for healthy males 

 between 15 and 30 years of age lies between 115 and 122 millimeters of 

 mercury when a 12.5-centimeter armlet is employed. 



2. When the 12.5-centimeter armlet is used the blood-pressure of 

 American soldiers serving in the Philippines averages 115 millimeters 

 for the period 18 to 30 years of age, and 118 for the period 30 to 40 

 years. 



3. This indicates that the blood-pressure of Americans residing in 

 the Philippines differs but little if any from the average at home. 



4. Usually the lowest readings for Americans living in the Philip- 

 pines were obtained in the first three months of tropical residence, but 

 there was no progressive tendency for the pressure average to rise or to 

 fall with increased length of residence up to a limit of three years, beyond 

 which our work did not extend. 



5. The blood-pressure of Americans was lower during the hottest 

 part of the year, but the difference was very slight, only about 3 milli- 

 meters. 



6. There was a well marked tendency for the blood-pressure of 

 Americans to rise with increasing age. 



7. Neither complexion type nor the use of underwear and hat linings 

 of orange-red color exerted any appreciable influence on the blood- 

 pressure of American soldiers. 



8. There was no well marked tendency for the blood-pressure or pulse 

 rate to rise with increasing height and weight of the individual. 



9. As was to be expected, exercise raised both the blood-pressure and 

 the pulse rate. 



10. Using a 12.5-centimeter armlet the average blood-pressure of Fili- 

 pinos was found to be 116 millimeters for a large group of males ranging 

 from 15 to 40 years of age and averaging 25 years. This pressure was 

 practically identical with that for the group of white men of the same 

 average age and living in the Philippines. 



11. There is a well marked tendency for the blood-pressure of Filipinos 

 to rise with increasing age. 



12. The pulse rate of active Filipinos and Americans living in the 

 Philippines averages a few beats above the usual standard of 72 per 

 minute. 



In closing we wish to express our obligations to the medical officers 

 mentioned in footnote 3, who by their earnest and continued efforts 

 made possible the collection of the statistics on which this report is based. 



