BIBLIOGRAPHIC INPUT SHEET TEMPORARY Patterns of mortality ...

252
Patternsof Mortality in Childhood
TaLH 153. Distribution of Live Births by Birth
Order, Province of Santiago, Chile (1962 and 1969).
Birth order
30
No.
Total ........ 9.5,722
I............ 24,0641
2 ............ 19001
3............ 14,401
4............11,339
5 and over... 20,340
1902 196o
% No. %
99.0 84,791 100.1
25.7
19.9
15.0
11.8
27.5
1_ 1
29,074
21,090
12,180
7.1:0
14,410
Source: Chile, National Health Service (1963, 1970).
I
35.4
24.0
14.4
8.4
17.0
Fin. 125. Percentage Distribution of Live Births
by Birth Order, Province of Santiago. Chile (1962
and 1969).
40 -among
2Chase,
,0 -birth
1962
0 .countries,
, 2 3, 4 34. 2 3,4
,11THoDER
S...C. Chi, .i...,i H.alh s.,vi..
,,,
should be combined in the study of infant
mortality. In the California project, though
the distributions of live births were avail­
able, the numbers of deaths were too small
for calculation of rates for each birth order
by age of mother. An analysis made of neonatal
mortality in the United States (Loeb,
1965) by maternal age and infant's birth
order, in matched records for three months
in 1950, showed high death rates for all birth
orders in the group of mothers under 20
years of age, with the lowest occurring
among first births. For the next age group,
20-24 years, an increase also occurred with
higher birth order, the lowest rate being
first birthls. In the other mnaternal
age groups the second births had a lower
rate than the first. Extensive analyses have
been made of neonatal and infant mortality
in two cohort studies (Armstrong, 1972; and
1972-b) from linked records in 1950
and 1960 in the United States on the basis
of birth weight as well as age of mother and
order. For a full understanding of
these problems in Latin American cities and
the distributions of all live births
by age and parity of mothers and by birth
weight are needed, together with similar
data for all infant deaths.
OUTCOME OF PREVIOUS PREGNANCIES
Before the reproductive histories were
utilized, the data they contained were reviewed
for completeness and reliability. In
this section, use has been made only of histories
with complete information regarding
the births and fetal deaths, i.e., data that
appeared to be consistent in all respects.
For example, several histories containing
data on age of mother and birth order that
were suitable for use in the previous section
could not be used for this present analysis
because the medical record indicated additional
fetal losses and thus these histories
were considered less reliable.
The total ald average numbers of products
of previous pregnancies among mothers
of deceased children in the 15 projects
are presented first in Table 154. With two