480 



CHAMBERLAIN. 



Two small groups among our Filipinos, which are not included in 

 the above consideration, are of interest. One is a group of 26 Filipinos 

 ranging in age from 40 to 75 years, the average being 50.6 years. The 

 mean pressure was 144.8. This seems a high figure, considering the aver- 

 age age, and possibly may signify that the elevation from increasing 

 years comes on earlier for Filipinos than for white men. Casual obser- 

 vation suggests that the other indications of senility occur early among 

 tropical natives. The other group consists of 20 Igorots, all apparently 

 young, but whose exact ages could not be detennined. They gave an 

 average of 122.0 millimeters. The Igorots were living at an altitude 

 of 1,500 meters in a comparatively temperate climate, and though smaller 

 in stature are better developed physically than the lowland natives. 

 Their blood-pressures averaged 6 or 7 millimeters higher than the mean 

 for the lowland Filipinos, the increase probably being due to the 

 altitude. (8) The whole Filipino group, except the Igorots, is arranged 

 by ages in Table XIV. 



Table XIV.- — Average systolic blood-pressures for 366 lowland Filipinos; arranged 

 by ages. {12.5-centimeter armlet.) 



Age period. 



15 to 20 years- 

 20 to 25 years- 

 25 to 30 years- 

 30 to 35 years. 

 35 to 40 years _ 

 Over 40 years 



Total — 



Number of men showing pressures from — 



80 



to 



90 



mm. 



91 I 101 



to j to 



100 110 



mm. I mm. 



I 



111 



to 



120 



mm. 



4 

 10 

 7 

 2 

 1 



24 



11 



49 



21 



6 



5 



4 



.18 



59 



32 



5 



5 



4 



96 123 



121 



to 



130 



mm. 



6 



28 



23 



10 



3 



1 



71 



131 



to 



140 



mm. 



141 



to 



l&O 



mm. 



26 



151 



to 



160 



mm. 



161 



to 



200 



mm. 



Total 

 number 

 of men. 



40 

 161 

 95 

 28 

 16 

 26 



366 



Average 



pressures.! 



mm. 



112.8 



115.4 



117.0 



116.9 



112. 3 



144.8 



It will be seen that the blood-pressure showed a tendency toward pro- 

 gressive increase with age except in the period 35 to 40 years. The 

 records for this period contained 5 exceptionally low blood-pressure 

 readings and. as there were in all only 16 men in this subgroup it is 

 probable that such a low reading for the ages of 35 to 40 is merely the 

 result of accident and would not be manifest in a larger series. Pulse 

 rates were recorded only for the Scout and Constabulary groups and 

 averaged for the foi-mer 75.7 (blood-pressure 115.0 millimeters) and 

 for the latter 82.5 (blood-pressure 115.9 millimeters). These averages 

 do not vary materially from the pulse rates found for our various groups of 

 American soldiers in the Philippines. 



