Is there a health benefit of reduced tobacco consumption? : a systematic review

(Disponible en anglais seulement.)
This review of 25 studies indicates that a significant decrease in tobacco consumption does improve health. For instance, health advantages include: a 25% decrease in biomarkers and occurrence of lung cancer and a small slight increase in birth weight. Evidence for mortality and other health benefits is incomplete to generate conclusions.
http://www.informaworld.com/smpp/content~content=a779329648

Comment: Decreasing tobacco consumption can also lead to cessation.