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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 presenceof residental institutions in the area.
To compare the crude 1969 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 11% above, and the
death rate is 2% below, the national rates.
Classification of Deaths
The Registrar General has analysed the 1969 deaths by causes which are classified according to the
International Abbreviated List of 50 causes (B.List) of the Eighth Revision of the International
Classification of Diseases but with some sub-divisions, to improve comparability with the classification
used before 1968.
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