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Comparability Factors
To enable local vital statistics to be compared with other districts or with national figures, the
Registrar General issues comparability factors for correcting crude birth and death rates. These
factors make allowance for the way in which the sex and age distribution of the local population
differs from England and Wales as a whole. The death rate comparability factor has been adjusted
specifically to take account of the presence of residential institutions in the area.
To compare the crude 1968 rates for Haringey with the national rates, Haringey's figures must
first be multiplied by the appropriate comparability factors, which are 0.92 for births and 0.96 for
deaths.
After making these adjustments to the local rates, the birth rate for Haringey is 14% above, and
the death rate is 2% below, the national rates.
Classification of Deaths
Following the introduction of the Eighth Revision of the International Classification of Diseases
the Registrar General has analysed the 1968 deaths by causes which are classified according to the
International Abbreviated List of 50 causes (B.List) but with some further sub-divisions, to improve
comparability with the classification used for previous years.
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