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Timing of onset of cognitive decline: results from Whitehall II prospective cohort study

BMJ 2012; 344 doi: http://dx.doi.org/10.1136/bmj.d7622 (Published 05 January 2012) Cite this as: BMJ 2012;344:d7622

Re: Timing of onset of cognitive decline: results from Whitehall II prospective cohort study

Good research. In the discussion section it would have been helpful to give further insight into what age the declines began. Based on your figure 'Decline in cognitive test scores over 10 years...' It would appear the decline in reasoning would have started to become measurable at some point in the samples 30's, perhaps at age 35?

Competing interests: No competing interests

07 January 2012
Kevin Tibbetts
semi-retired manager
Redditch
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