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Health benefits

Many of tobacco's detrimental health effects can be reduced or largely removed through smoking cessation. The health benefits over time of stopping smoking include:

The British Doctors Study showed that those who stopped smoking before they reached 30 years old lived almost as long as those who never smoked. Stopping in one's sixties can still add three years of healthy life. Randomized U.S. and Canadian trials showed that a ten-week smoking cessation program decreased mortality from all causes over 14 years later. A recent article on mortality in a cohort of 8,645 smokers who were followed up after 43 years determined that "current smoking and lifetime persistent smoking were associated with an increased risk of all-cause, CVD, COPD, and any cancer, and lung cancer mortality."

The significant increase in the risk of all-cause mortality that is present in people who smoke is decreased with long-term smoking cessation. Smoking cessation can improve health status and quality of life at any age. Evidence shows that cessation of smoking reduces risk of lung, laryngeal, oral cavity and pharynx, esophageal, pancreatic, bladder, stomach, colorectal, cervical, and kidney cancer, in addition to reducing the risk of acute myeloid leukemia.

Another published study, "Smoking Cessation Reduces Postoperative Complications: A Systematic Review and Meta-analysis," examined six randomized trials and 15 observational studies to examine preoperative smoking cessation's effects on postoperative complications. The findings were: 1) taken together, the studies demonstrated a decreased likelihood of postoperative complications in patients who ceased smoking before surgery; 2) overall, each week of cessation before surgery increased the magnitude of the effect by 19%. A significant positive effect was noted in trials where smoking cessation occurred at least four weeks before surgery; 3) For the six randomized trials, they demonstrated, on average, a relative risk reduction of 41% for postoperative complications.