Quitting smoking at any age reduces the risk of death after 70, but people aged 70 or older currently smoking were more than three times more likely to die than never-smokers, finds researchers based on data from more than 160,000 individuals aged 70 and over.

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Quitting smoking at any age reduces the risk of death after 70, but people aged 70 or older currently smoking were more than three times more likely to die than never-smokers, finds researchers based on data from more than 160,000 individuals aged 70 and over.