From Sam Edge, Ringwood, Hampshire, UK
I agree with Paul Holt on the need to control for factors affecting dementia rates other than school leaving age before and after 1972. But I would be cautious before assuming that the older cohort who were born and brought up during rationing, and their mothers, were more likely to be malnourished. Many studies suggest that the UK rationed diet was healthier, with less meat, fat and sugar and more fruit and veg(Letters, 26 April).
