Table
16
Table 16 presents late foetal death by age of mother
for as many years as possible between 1990 and 1998.
Description
of variables: Late foetal deaths are foetal deaths[1]
of 28 or more completed weeks of gestation. Foetal deaths of unknown gestational age
are included with those of 28 or more weeks.
Age is
defined as age at last birthday, that is, the difference between the date of
birth and the date of the occurrence of the event, expressed in completed solar
years. The age classification used in this table is the following: under 15
years, 5-year age groups through 45-49 years, 50 years and over, and age
unknown.
Reliability
of data: Data from civil registers of late foetal deaths which are reported as
incomplete (less than 90 per cent completeness) or of unknown completeness are
considered unreliable and are set in italics rather than in roman type. Table 15
and the technical notes for that table provide more detailed information on the
completeness of late foetal death registration. For more information about the quality
of vital statistics in general, and the information available on the basis of
the completeness of estimates in particular, see section 4.2 of the Technical
Notes.
Limitations:
Statistics on late foetal deaths by age of mother are subject to the same
qualifications which have been set forth for vital statistics in general and
foetal-death statistics in particular as discussed in section 4 of the Technical
Notes.
The
reliability of the data, an indication of which is described above, is an
important factor. Of all vital
statistics, the registration of foetal deaths is probably the most
incomplete.
Variation
in the definition of foetal deaths, and in particular late foetal deaths, also
limits international comparability.
The criterion of 28 or more completed weeks of gestational age to
distinguish late foetal deaths is not universally used; some countries or areas
use different lengths of gestation or other criteria such as length of the
foetus. In addition, the difficulty
of accurately determining gestational age further reduces
comparability.
Another
factor introducing variation in the definition of late foetal deaths is the
practice by some countries or areas of including in late foetal death statistics
infants who were born alive but died before registration of birth or within the
first 24 hours after birth thus overestimating the total number of late foetal
deaths. Statistics of this type are
footnoted.
In
addition, deficiencies in age reporting, differences in the method used for
obtaining the age of mother, and the proportion of late foetal deaths for which
age of mother is unknown must all be taken into account in using these data.
Coverage: Late
foetal deaths by age of mother are shown for 63 countries or areas.
Earlier
data: Late foetal deaths by age of mother have been shown previously in issues
of the Demographic Yearbook featuring natality. For information on years covered,
readers should consult the Index.