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16
Illegitimate Births.—The following table shows the number of
illegitimate births and the percentage of the total births. In 1935,
100 such births were registered in Chelsea, and 39 inward transfers and
84 outward transfers were made by the Registrar-General. The nett
figure for the Borough is therefore 55.

Stillbirths.—During the year 27 stillbirths were registered in Chelsea,
11 being males and 16 females. Of these, stillbirths of non-parishioners
account for 15 (7 males and 8 females) and must be deducted. In
addition, there were 10 stillbirths amongst Chelsea mothers outside the
Borough (6 males and 4 females). The corrected number of stillbirths
is, therefore, 22, which represents a rate for the Borough of 0.38 per
1,000 of the population, as compared with 0.52 for London as a whole.
MARRIAGES.
There were 748 marriages registered in the Borough during the year
(739 in 1934). The marriage rate (number of marriages per 1,000 of
population) was 13.0. In the preceding year the marriage rate was
12.7.
DEATHS.
During the year 1,698 deaths were registered in Chelsea. Of these,
deaths of non-residents accounted for 1,152. In addition, there were
176 deaths of Chelsea residents in Institutions and elsewhere outside
the Borough. The total number of Chelsea deaths for the year was
therefore 722, equivalent to a death-rate of 12.6 per 1,000 of population.
The death rate for England and Wales for 1935 was 11-7 and for
London 11-4.
Adjusted Death Rate.—If the populations of all areas were similarly
constituted as regards the proportions of their sex and age group components,
their crude death rates (deaths per 1,000 population) could be
accepted as valid comparative measures of the mortalities experienced
by the several populations.
In practice, however, populations are not thus similarly constituted,
and the Registrar-General has accordingly calculated a factor (called the
Comparability Factor) for each district. This is, in effect, an adjustment
of the age and sex composition of the district to that of England and
Wales as a whole, so that all may be compared on the same basis. To
obtain the adjusted death rate, the crude death rate is multiplied by the
Comparative Factor which has the effect of making a corrected death
rate comparable with the death rate of any other district which has been
similarly adjusted. The Comparative Factor for Chelsea is 0.85, and the
death rate for 1935 when so adjusted is 10.7.