Air Pollution Raises Risk of Dementia, Say Cambridge Scientists

Exposure to certain forms of air pollution is linked to an increased risk of developing dementia, according to the most comprehensive study of its kind. From a report: The illness is estimated to affect about 57 million people worldwide, with the number expected to increase to at least 150m cases by 2050. The report, which was produced by researchers at the Medical Research Council's epidemiology unit at the University of Cambridge involved a systematic review of 51 studies.

It drew on data from more than 29 million participants who had been exposed to air pollutants for at least a year. Although air pollution has already been identified as a risk factor for dementia, the research, which is the most comprehensive study of its kind to date, found there to be a positive and statistically-significant association between three types of air pollutant and dementia.

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