312 The Philippine Journal of Science 1922 
TABLE 2.—Coefficients of correlation between death rates from certain 
diseases and certain economic and housing factors. 
| Correlated with— 
| Death rate from— Personal prop- : : : 
| creyand'real | Taxes. | Papegin | Reecnasm 
eee ee rt ee Saee ee 
| tht} egtibethtcvaluseeun este +0,1840.10 |  +0.36+0.09| —0.52+0.08| —0.82+0.10 
BOON asia Se ee +0,120.11} +0.2640.10| —0.22+0.10| —0,05+0.11 
(einatipie cL, Ss sk ~0,08+0.11 | —0.1040.11|  +0.1740.10| —0.09+0.11 
| Asiatic cholera_.....------------- +0.0140.11; +0.4240.09) —0.4940.08| —0.10+0.11 
1. Dysenteryccce.a--<9 3 teens 40.1140.11 | —0.12+0.11| —0.3940.09} —0.31+0.10 
Yaprely 0 be ee —0,1940.10 | —0.04+0.11} —0.0940.11 | —0.28:0.10 
[= Bevibert zou: S2k. 2s eee +0.1340.11; 0.114011) +0.0640.11 | +0.03+0.11 
| Pulmonary tuberculosis..-.------ +0.3740,09 | +0. 0640.11) —0.4240.09 | —0.58+0.08 
All causes—The coefficient with personal property and real 
estate is +-0.18, which, considered with its probable error, 
+ 0.10, is not significantly different from 0. The coefficient with 
taxes is just four times its probable error and, therefore, prob- 
ably though not surely significant. The coefficient with the 
average number of persons to the family is high, revealing a 
negative association of the rates with the number of persons 
in the family; in other words, high death rates occur in prov- 
inces where families are small. 
Asiatic cholera.—The coefficients with taxes and with number 
of persons to the family are both significant. It is judged from 
this that the death rates from cholera are higher among the 
people in provinces where higher taxes per capita are paid. 
It furthermore means that the rates are inversely proportional 
to the number of persons in the family. There is, however, 
an apparent anomaly in the death rates having a negative corre- 
lation with the number of persons in the family and no correla- 
tion with the number of persons in the dwelling, considering 
the fact, alluded to above, that families and dwellings are factors 
of practically the same nature. 
Dysentery.—Economic factors show no association with death 
rates from dysentery. Number of persons in the family, how- 
ever, appears to be slightly negatively associated with the rates. 
Pulmonary tuberculosis—In this disease, as in all causes, 
Asiatic cholera, and dysentery, the association with the number 
of persons in the family is apparent. Unlike any of the others, 
however, the correlation with the number of persons in the 
dwelling is high and negative; in fact, the coefficient for this 
is the highest obtained in the whole series. This suggests that, 
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