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Alzheimer’s Disease

Volume 493: debated on Tuesday 2 June 2009

To ask the Secretary of State for Health what estimate he has made of the rate of incidence of Alzheimer's disease in (a) England, (b) London and (c) the London Borough of Croydon in each of the last 10 years. (276874)

The Department does not have data on the incidence of Alzheimer's disease. However the national Quality and Outcomes Framework (QOF) records the number of people recorded on practice disease registers with a diagnosis of dementia. Alzheimer's disease accounts for 50 to 75 per cent. of cases of dementia so the prevalence of patients with dementia gives an indication of the prevalence of Alzheimer's disease. This prevalence figure is available only for the two latest releases of QOF, covering 2006-07 and 2007-08 (financial years). However, these numbers are likely to be an underestimate of the true position. The Dementia UK report, published in 2007 by the Alzheimer's Society estimated that two-thirds of the people with dementia never receive a formal diagnosis.

Figures are supplied for the health areas, which best fit the areas requested.

These QOF figures are given in the following table:

Prevalence of dementia







London Strategic Health Authority



Croydon Primary Care Trust