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Movies Encourage Teen Smoking, Study Finds

November 8, 2005
The first national study to look at the connection between smoking in movies and smoking among adolescents shows that exposure to smoking in popular films is a primary risk factor in determining whether young people will start smoking.

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The study by researchers from Dartmouth Medical School (DMS) and Norris Cotton Cancer Center (NCCC) appears in the November 7 issues of the journal Pediatrics.

The research, supported by the National Cancer Institute, suggests that exposure to movie smoking accounts for smoking initiation among over one-third of U.S. adolescents. It concludes that limiting exposure of young adolescents to movie smoking could have important public health implications.

"We found that as the amount of exposure to smoking in movies increased, the rate of smoking also increased." said lead author Dr. James Sargent, professor of pediatrics at DMS and director of the Cancer Control Research Program at NCCC.

"Part of the reason that exposure to movie smoking has such a considerable impact on adolescent smoking is because it is a very strong social influence on kids ages 10-14," he said.

"Because movie exposure to smoking is so pervasive, its impact on this age group outweighs whether peers or parents smoke or whether the child is involved other activities, like sports," said Sargent.

In the study, 6,522 US adolescents aged 10-14 were asked to identify films they had seen from a list of 50 randomly selected titles out of a database of films released in the U.S. from 1998 – 2000. Researchers found examples of movie smoking in 74 percent of the 532 movies in the database.

Based on the movies each participant had seen and the amount of smoking in each movie, the adolescents were split into four levels of exposure to movie smoking. Researchers then examined risk for adolescent smoking, comparing adolescents in the higher movie smoking categories with the lowest category and controlling factors known to be linked with adolescent smoking, like peer and parent smoking.

Even after considering all other factors known to influence the smoking risk, DMS researchers found that adolescents with the highest exposure to movie smoking were 2.6 times more likely to take up smoking compared to those with the lowest exposure.

All else being equal, the researchers found that of 100 adolescents that tried smoking, 38 did so because of their exposure to smoking in movies.

The study confirms the results of a regionalized study by the researchers that focused on adolescents in Northern New England, published December 15 in the British Medical Journal.

The data in that research showed that exposure to smoking in movies had a similar impact on first-time cigarette smoking, but the children interviewed for that study were predominantly Caucasians living in mostly rural areas, and so the results could not be applied to the rest of the country.

"This is an extremely powerful confirmatory study that shows that kids react the same way to the movies in other places in the U.S. as they do in New England," said Sargent. "It means that no child is immune to the influence of smoking in movies."

The participants' ethnicity was taken into account as well. This large national research sample found that Hispanic and black youths were exposed to significantly more movie smoking than their white counterparts, so the population impact may be larger in minorities.

"The finding on minorities is concerning." said co-author of the study, Dr. Linda Titus-Ernstoff, professor of community and family medicine at DMS. "On average, Hispanic and black adolescents are exposed to more movie smoking than whites, so movie smoking may have a greater impact in these populations."

In the study, the researchers suggest several ways to reduce teens' exposure to movie smoking. "As a pediatrician, I think that parents need to become more aware of what their young children watch and make an effort to shield young children from the messages in PG-13 and R rated movies," said Sargent.

The team also hopes that, in light of their new research, the movie industry will be persuaded to voluntarily reduce depictions of smoking and cigarette brands.

They also suggest that the movie industry could incorporate smoking into the movie rating system to make parents aware of the risks a movie with smoking poses to the adolescent viewer, and include an antismoking preview on all DVD movies that depict smoking. "Those measures have a minimal cost to the movie industry," said Sargent.

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