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the number of insured people in the Borough, the lowest number was
91 per cent. in January, March and June and the highest 113 in
November.
Extracts from Vital Statistics of the Year.
Total. M. F.
Legitimate 932 485 447
Live Births Illegitimate 127 63 64
Birth Rate per 1,000 of the estimated resident population—117.
Stillbirths 34
Rate per 1,000 total (live and still) births—311.
Deaths 1029
Crude Death Rate per 1,000 of the estimated resident population—11.4.
Death Rate Comparability Factor (C.F.) = 0.94.
Adjusted Death Rate =
Crude Death Rate X C.F. = 11.4 X 0.94 = 10.7.
Since the populations of all areas are not similarly constituted as
regards the proportions of their sex and age group components,
their Crude Death Rates (deaths per 1,000 population) are not
valid comparative measures of the mortalities experienced by the
several populations, and fail as true comparative mortality indexes in
that their variations are not due to mortality alone, but arise also from
differences in their population constitution, the two elements being
combined in indistinguishable proportions. The Registrar General
has prepared Comparability Factors for adjusting local death rates,
and when the Crude Death Rate of an Area is multiplied by the appropriate
Factor, an "Adjusted Death Rate" is obtained which is comparable
with the Crude Death Rate of the country as a whole, or with
the "Adjusted Death Rate" of any other area.