BIBLIOGRAPHIC INPUT SHEET TEMPORARY Patterns of mortality ...

Chapter I1. Birth Weight
57
TABLE 14.
Neonatal Mortality in Single and Plural Births, by Birth Weight, in California Project.
Birth weight in grains
Type of birth
Neonatal 2,600 or less 2,501 and over
Estimated deaths _
live
births Neonatal Neonatal
Live deaths Live deaths
births
births
No. Rate No. Iate No. State
Total .................... 44,740 570 12.7 3,411 443 129.9 41,329 127 3.1
Single ................... 43,855 494 11.3 2,939 369 125.6 40,916 125 3.1
Plural ................... 885 76 85.9 472 74 156.8 413 2 4.8
Fro. 31. Percentage of Multiple Births' among fornia experience shows that products of
Infants Dying in Neonatal Period in 13 Cities and
Two Projects.
multiple pregnancies have high neonatal
PEE CENT
mortality due to their low birth weights,
0 3 10 is 20
Ro s among other factors.
IKIEl
SINMAN FOl I CI ­
* * *
,SUl.C, - The frequency of low-weight births has
0Ml1 F1110 ______ ___ been presented as background information
Nil. o16110
be'quse of the important implications of
iA?At
this ;actor in terms of the child's future
CAUWINIA PROJICI
nAIIABMA
growth and development, susceptibility to
SAOPAUtO
infection, and chances of survival. Some
11110011 of these implications
CAUI
are considered in later
COl1,IV
chapters. Knowledge of true differences in
SAIIIo0
SANSALMO
distribution of birth weights for all births
and infant deaths in cities and countries
eOf bl,h. I, ho.pi .,. ith ..it0, ,.d. 1 is limited at present. Also the relationship
of low birth weight to other factors cannot
per 1,000 live births-was higher than for be established because of the lack of goodsingle
live births owing to the greater fre- quality data. Therefore continued efforts
quency of plural births in the lower weight are needed so that all the important inforgroups.
Since there were only two neonatal ination will be recorded for each birth and
deaths among plural births with weights of death. In addition, research in this field
2,501 grams or more, the number is not large involving rural as well as urban populations
enough for evaluation of differences of is essential in order to establish bases for
mortality in that weight group. This Cali- sound preventive action.