Risks associated to smoking

People who smoke are not just in risk of developing lung cancer, recent studies have shown that they are also in danger of developing other cancer forms, such as colorectal cancer.
 
 
This conclusion was reached by a team of scientists after studying the association  between colorectal cancer and long term cigarette smoking. 185,000 participants where studied from 1992 through 2005. Their age ranged from 50 to 74 years. In the study the participants where required to describe their medical conditions and behaviors.   
 
Those who smoked for more than 40 years, and those who not stopped smoking before being 40 years old, had from 30 to 50 percent higher risk of developing rectal or colon cancer. That’s even after analyzing other risk factors.  
 
Smoking have also being linked with increased risk of acquiring type 2 diabetes.  A systematic review of the incidence of diabetes and other metabolism irregularities showed that active smokers have 44 percent higher risk of developing diabetes, compared with people who do not smoke.  They reached this conclusion after making an analysis of 25 different studies on which a total of 1.2 million people participated.  
 
The study also showed that the more you smoke, the higher the risk.  For heavy smokers (more than 20 cigarettes per day) the risk was 61 percent higher, while the risk for lighter smokers was 29 percent. For people who had quit smoking the risk was even lower, 23 percent.