Researchers conducting the University of Michigan's Monitoring the Future study theorized that much of the increase may be due to the fact that public perception of the dangers of marijuana use have shifted dramatically in recent years with its legalization in a growing number of jurisdictions.
"It's clear that for the past seven or eight years there has been an increase in marijuana use among the nation's college students," Lloyd Johnston, the principal investigator of the study, said in a statement.
Students seem to have also absorbed the messages in public health campaigns in recent years about the dangers of cigarettes.
"Unfortunately," the researchers wrote, "the appreciable declines in cigarette smoking have been accompanied by some increases in the use of other forms of tobacco or nicotine."
An FDA anti-smoking video released in February of last year:
The survey found that the number of students smoking tobacco with a hookah at least once in the prior 12 months rose from 26 percent in 2013 to 33 percent in 2014.
E-cigarette use remained relatively stable but high at 9.7 percent over the prior 30 days, flavored little cigars 9.8 percent, regular little cigars 8.6 percent and large cigars 8.4 percent.
The researchers said they would continue tracking how the popularity of alternate forms of tobacco is shifting among all age groups.
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