BIBLIOGRAPHIC INPUT SHEET TEMPORARY Patterns of mortality ...

112: Pattern. of Mortality in Childhood
Fia. 52.: Neonatal Mortality from Anoxio and Hypoxic Conditions as Underlying Uauses
md with Immaturity as Contributory Cause in 15 Projects.
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have a very similar clinical picture. Subcategories
776.4 and 776.9 should be considered
as poorly defined underlying causes,
their frequency being a sign of lack of diagnostic
data. In various instances in which
the only information available wvas that
the newborn was a premature and suffered
from somc form of resp~iratory distress or
hypoxia, the underlying cause was assigned
to the hypoxic condition and the preuoiaturity
wvas considered a contributory cause.
This procedure was adopted because of the
international rules excluding the assignment
of immaturity as underlying cause whe.n
another cause of lperinatal mortality is
present.
Figure 52 shows a fairly close corres-
where the rates for these conditions were
904.6 and 855.3 per 100,000 live births,
those for immaturity as contributory cause
were 685.3 and 671.1 (Table 54); and in
the California project the rates were 163.2
and 134.1, respectively.
The above-mentioned factors possibly involved
in the different distribution patterns
of neonatal deaths by birth weight also
ap~ply for deaths from anoxic and hypoxic
conditions as underlying causes. There is,
however, another factor related to classification
procedures and affected by the
availability of diagnostic data: many neonatal
deaths of low-birth-weight infants are
asge oti aeoybcueteei
asne to hspeifcatg toepanetheretis
bcause
pondence between neonatal death ratesnoohrseiccaetoxpinihrte
from anoxic and hypoxic conditions (776) immaturity or the acute hypoxic condition
as underlying causes and those for immiiaturity
as contributory cause, though the condition (including hypoxia) and imma­
and because in the presence of any specific
rates for immaturity were lower. In turity, the former is selected as underlying
Ribeirfio Pr~to and Recife, for example, cause of death.