Banning "light" from cigarette packs falls short

More and more countries are banning the words "light" and "mild" from cigarette packs, but a new study suggests that may not be enough to dispel smokers' misbeliefs that the products are safer.

Researchers found that after the UK, Australia and Canada banned the terms as deceptive, there was a dip in the number of people who mistakenly believed that cigarettes marketed as "light" or "mild" carried fewer health risks.

However, the decline was temporary, the investigators report in the journal Addiction.

And in the UK, misperceptions were consistently higher versus the other two countries, as well as the U.S. - where, at the time of the study, no such ban was in place.

"The findings from this study confirm our earlier work showing that merely removing the terms 'light' and 'mild' from cigarette packs is insufficient to change people's beliefs that those products are safer," lead researcher Dr. Hua-Hie Yong said in an email.

To really clear up misperceptions, more steps are needed, according to Yong, of the Cancer Council Victoria in Melbourne, Australia.

"Light" cigarettes are designated as such because they deliver less nicotine and lower levels of toxic chemicals - or "tar" - when the smoke is measured by a machine.

In real life, though, studies show that smokers inhale comparable amounts of nicotine and chemicals regardless of the brand. And critics have long charged that tobacco products dubbed "light" or "mild" confuse people into thinking there are fewer health risks.

In response, the European Union and Brazil put bans on those terms in 2003, and other countries have since followed suit.

A U.S. law that bars the words "light," "low tar" and "mild" from tobacco products went into effect almost exactly one year ago.

For the new study, Yong's team looked at results from an international survey done annually between 2002 and 2009 in Australia, Canada, the UK and the U.S.

The surveys involved a total of 21,600 smokers who were asked the extent to which they agreed with statements like, "Light cigarettes are less harmful than regular cigarettes."

Overall, the study found that shortly after "light" bans went into effect, misperceptions about the cigarettes generally dipped in Australia, Canada and the UK.

However, the false beliefs began to creep back in within a couple years.

In the UK, which banned the terms in 2003, misperceptions remained persistently higher than in other countries, including the U.S. On average, UK smokers had a higher level of agreement with statements extolling the advantages of light cigarettes over regulars.

It's not clear why that is, according to Yong.

But one reason, the researchers speculate, could be a UK law of the same time period that forced tobacco makers to lower the tar "yield" in cigarettes. That, Yong said, might have drawn smokers' attention to the tar issue, and reinforced the belief that lower tar means a safer cigarette.