Around the world, those treated for addiction far more likely to smoke

The review, led by Joseph R. Guydish, PhD, a UC San Francisco professor of medicine and health policy, was published on Tuesday, Sept. 22, 2015 in the journal Addiction.

"When people come into treatment for drugs and alcohol, we are not treating another addiction that has a significant chance of eventually killing them, which is tobacco use," said Guydish. "At a public health level, this means that our addiction treatment efforts should address smoking and tobacco use better than they do now."

Guydish and his team reviewed 54 studies, involving a total of 37,364 participants in 20 countries on six continents, which were published in English from 1987 to 2013. They found that among people in treatment for drug and alcohol use, the overall rate of smoking was 84 percent, compared with a rate of 31 percent for members of the general population, matched for gender and year of study.

The results agree with an earlier review led by Guydish of smoking addiction treatment programs in the U.S. In that paper, the authors found that the median smoking rate among people in addiction treatment was 76.3 percent, in contrast with the smoking rate in the general U.S. population, which is now estimated at less than 18 percent.

"Every person who enters substance abuse treatment ought to have their tobacco use evaluated and treated," said Guydish. "If they don't want to be treated and quit right away, they should have some education to help them think more about quitting."

Guydish observed that "there are data from a number of studies which strongly suggest that you can improve substance treatment outcomes by addressing smoking among the patients in treatment. That's what we should be doing."

The World Health Organization (WHO) has created a policy package called MPOWER, noted Guydish, which is designed to assist countries in implementing anti-smoking initiatives. "We would recommend that WHO pay attention to this finding and use it to extend their MPOWER strategies," said Guydish. "Anyone who is interested in smoking reduction internationally could use this information at the policy level."