IQ no influence on smokers starting, study claims

Researchers say people in lower socioeconomic levels in the Western world are more likely to be smokers and slower to kick the habit than their wealthier counterparts. Some have suggested that these individuals may be less intelligent and thus less likely to understand the risks of smoking.

But this study found that wasn't the case. Instead, social factors played a bigger role. They add that's important to note because it could effect treatments geared toward getting people to quit.