Dr. Mark Hamer of University College London says previous research found that smokers have a higher rate of mental illness, specifically depression.

英国伦敦大学学院的马克·哈默医生说，早先的研究发现，吸烟者患精神疾病的比率较高，特别是抑郁症。

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Dr.Mark Hamer of University College London says previous research found that smokers have a higher rate of mental illness, specifically depression.

VOA: standard.2010.06.15

Specifically, 22% of those who had depression went on to develop dementia compared to 17% of those who did not have depression.

BBC: Depressed elderly man