Wednesday, July 1, 2015
Paying smokers to quit
Smoking is a major cause of heart attacks, strokes, emphysema, and lung cancer. Smoking rates have steadily declined in the U.S. in the last 50 years, but about a fifth of U.S. adults still smoke. Helping them quit would make a major contribution to their health.
A study in the current issue of the New England Journal of Medicine (NEJM) studied the effectiveness of different incentive programs on smoking cessation. Over 2,500 smokers were randomized into 3 groups. One group received “usual care”, meaning encouragement to quit smoking and information about quitting programs and nicotine replacement products. Another group was invited to join a “reward program” in which each subject who successfully quit smoking for 6 months received an $800 reward. The third group was invited to join a “deposit program” in which each subject had to pay $150 which would be forfeited if the subject kept smoking. If the subject quit smoking for 6 months, however, she would receive her deposit back and an additional $650.
Six percent of the usual care group had successfully quit smoking for 6 months. Ninety percent of those invited to join the reward program enrolled, and 16% of them successfully quit smoking for 6 months, much more than the usual care group. Of the subjects invited to join the deposit program only 14% accepted. But of those who accepted, over half successfully quit smoking for 6 months (or 7.6% of those invited).
So overall, the deposit group did worse than the reward group, because so few people accepted enrollment into the deposit group. Of those who enrolled in both groups, the deposit group did much better. The findings of the study are well summarized in this short video.
This study sits at an intersection between health research and a relatively new field called behavioral economics. Behavioral economics studies the consistent ways that people make irrational decisions. One finding that has been substantiated by many studies in behavioral economics is the phenomenon of loss aversion—people avoid losses more then they seek gains. For example, most of us will work harder or sacrifice more to avoid a $50 loss than to make $50.
A related NEJM editorial makes the point that this study demonstrated loss aversion in 2 ways. One was that the subjects who agreed to the deposit program were much more likely to quit smoking than those who agreed to the reward program. That means that people were more willing to quit smoking to recoup their own money than to make additional money. The second demonstration of loss aversion is that so few people agreed to enroll in the deposit program.
I'm sure there are practical lessons here both for policy makers and for friends and colleagues of smokers. If I had a close friend who smoked I would suggest that he write a check to a cause or a candidate or a group that he absolutely loathes. He hands the check to me. I promise that if he quits smoking and doesn't restart in a year I tear up the check, but if he doesn't then I mail the check. I suspect if the check amount was painful enough, the success rate would be very high.
Healthy, Wealthy (NEJM Quick Take video)
Nudging Smokers (NEJM editorial)
Randomized Trial of Four Financial-Incentive Programs for Smoking Cessation (NEJM article)
Trends in Current Cigarette Smoking Among High School Students and Adults, United States, 1965–2011 (CDC)
Quitters, Inc. (A short story by Stephen King about a very effective program to quit smoking)
Albert Fuchs, MD, FACP, graduated from the University of California, Los Angeles School of Medicine, where he also did his internal medicine training. Certified by the American Board of Internal Medicine, Dr. Fuchs spent three years as a full-time faculty member at UCLA School of Medicine before opening his private practice in Beverly Hills in 2000. Holding privileges at Cedars-Sinai Medical Center, he is also an assistant clinical professor at UCLA's Department of Medicine. This post originally appeared at his blog.
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Albert Fuchs, MD, FACP, graduated from the University of California, Los Angeles School of Medicine, where he also did his internal medicine training. Certified by the American Board of Internal Medicine, Dr. Fuchs spent three years as a full-time faculty member at UCLA School of Medicine before opening his private practice in Beverly Hills in 2000.
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Ira S. Nash, MD, FACP, is the senior vice president and executive director of the North Shore-LIJ Medical Group, and a professor of Cardiology and Population Health at Hofstra North Shore-LIJ School of Medicine. He is Board Certified in Internal Medicine and Cardiovascular Diseases and was in the private practice of cardiology before joining the full-time faculty of Massachusetts General Hospital.
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