BIBLIOGRAPHIC INPUT SHEET TEMPORARY Patterns of mortality ...

114 .Pattern.of Mortality in Childhood
RELATIONSHIP. BETWEEN NEONATAL MORTALITY AND
MATERNAL AGE AND INFANT'S BIRTH ORDER
Vlaternal Age
In two of the Latin American countries
vith projects in the Investigation (Chile
ind El Salvador) the distributions of live
irths were reported by age of mother for
geographic subdivisions, and in three proiects
(Chaco Province, Sao Paulo, and
Monterrey) the principal collaborators provided
these basic data. Similar information
vas obtained for Sherbrooke from the prin-
,ipal collaborator, and for San Francisco
ind the four counties in the California project
from the State Health Department.
Iowever, because of the small numbers of
live births and deaths in the specific group5
)f causes in two of thesc so-ven projects
(Chaco Province and Sherbrooke), data are
presented here only for the other five (Sfio
Paulo, Chile, El Salvador, Monterrey, and
California). These data are of great value
for the analysis of factors bearing on the
lealth and survival of products of conception,
as can be seen from the following
examples.
In four of the five projects, a constant
pattern was discernible in the relationship
between neonatal mortality due to certain
perinatal causes (760-778) and age of the
mother, the neonatal death rates being
higher in the case of mothers less than 20
years of age (from 2,807.6 to 1,286.5 deaths
per 100,000 live births). On the other hand
in all five projects mothers in the age
groups 20-24 years and 25-29 years had the
most favorable rates from these causes.
Finally, neonatal mortality increased sigr.ificantly
as maternal age increased, with
rates for mothers aged 35 years and over
ranging from 2,297.0 to 1,025.1 per 100,000
live births in the Sio Paulo and California
projects, respectively (Table 57 and Figure
53). The pattern in the Chilean project,
where the rate for mothers under 20 years
(1,914.7) was lower than that for mothers
aged 35 and over (2,068.8), may be due to
Fiu. 53. Neonatal Mortality Due to Certain Perinatal Causes as Underlying Causes by Age of Mother
in Five Projects.
3000
SAO PAULO CHILE PROJECT EL SALVADOR MONTERREY CALIFORNIA
PROJECT
PROJECT
-2000
S.
Z
1000
a
0
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AGEOFMOTHERIN TRANS