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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 adjustedspecifically
to take account of the presence of residential institutions in the area.
To compare the crude 1967 rates for Haringey with the national rates, Haringey's figures must
first be multipliedby the appropriate comparability factors, which are 0.92 for births and 0.97 for deaths.
After making these adjustments to the local rates, the birth rate for Haringey is 12% above, and
the death rate is 5% below, the national rates.
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