People who smoke, vape, eat and dab cannabis all in the same stretch of time are far more likely to meet the clinical definition of addiction than people who stick to one method, according to a new national study.
Quick Take
- Researchers studied 17,732 U.S. adults who used cannabis in the past month, using 2022-2023 federal survey data.
- About 67% of people who used multiple methods of cannabis showed signs of cannabis use disorder, compared to 15% of people who mainly used edibles.
- People combining smoking, vaping, oral products, and dabbing had nearly 20 times higher odds of cannabis use disorder than lower-risk groups.
- The study’s lead author says asking patients how they use cannabis could help doctors spot addiction risk earlier.
A New York University Study Finds a Pattern Doctors Might Be Missing
Researchers at New York University (NYU) Langone Health pulled data from the National Survey on Drug Use and Health, a federal survey covering nearly 18,000 adults. They say it is the first national study to look at how different ways of using cannabis cluster together. The goal was simple: figure out if the method someone uses says anything about their risk of addiction.
The answer appears to be yes, and the gap is large. People who used several methods at once, known as polymodal users, had a cannabis use disorder rate of about 67%. Compare that to 47% for people who both smoked and vaped, 36% for people who mainly smoked, and just 15% for people who mainly ate edibles.
Daily Use Follows the Same Pattern
The study did not stop at addiction symptoms. It also looked at how often people used cannabis. About half of polymodal users reported daily use. That compares to 31% of people who smoked and vaped, 28% of people who mainly smoked, and only 13% of edible-only users. The method people choose appears tied to how deeply cannabis has taken hold in their daily routine.
The peer-reviewed version of the study, published through the journal behind the PubMed abstract, backs up the pattern with harder numbers. Multimodal users had more than four times higher odds of cannabis use disorder after researchers adjusted for other factors, with an adjusted odds ratio of 4.14. The riskiest combination, people who smoked, vaped, used oral or mucosal products, and dabbed, carried close to 20 times higher odds than the comparison group.
Why Method Might Matter as Much as Frequency
Lead author Dr. Omar El-Shahawy said the findings point to something doctors could actually use. “Our findings suggest that using cannabis in multiple forms may be a red flag for heavier use and symptoms of addiction,” he said, adding that asking patients how they consume cannabis “could help clinicians identify when a fuller assessment may be warranted.” That is a notably practical idea. Most doctors ask how often a patient uses a drug. Few ask how many different ways.
The finding fits into a bigger, well-documented pattern. The National Academies of Sciences has already concluded there is substantial evidence linking more frequent cannabis use to the development of problem use. A recent clinical review found cannabis use disorder affects about 22% of users overall, with higher rates among daily users and younger people. The new study adds consumption method as another piece of that risk puzzle.
What the Study Does Not Yet Prove
The study shows a strong association, not proof that using multiple methods causes addiction. It is possible people already using cannabis heavily simply gravitate toward more methods, rather than the methods themselves driving the disorder. The data also comes from self-reported survey answers, with no drug testing or outside verification involved. That is a normal limitation for large population surveys, not a flaw unique to this research.
There is one wrinkle worth noting. The public summary from NYU Langone reports different percentage figures than the peer-reviewed abstract itself, which lists overall cannabis use disorder prevalence at 30.3% and multimodal prevalence at 40.5%, versus the roughly 67% figure in the press release. The available materials do not explain the gap, though it likely reflects different ways of grouping subcategories or weighting the data.
A Practical Takeaway for Families and Doctors
For parents, spouses, and primary care doctors, the practical message is straightforward. A person who smokes a joint, hits a vape pen, eats a gummy, and dabs concentrate within the same window is not casually using cannabis. That pattern tracks with much higher rates of daily use and diagnosable addiction. It is a simple, low-cost question any doctor could start asking tomorrow, long before a formal clinical trial proves whether it changes outcomes.
The researchers are now pushing for follow-up work to track cannabis users over time, rather than snapshotting them once. That kind of study could show whether branching out into new consumption methods comes before addiction takes hold, or whether it is simply another symptom of use that has already spiraled. Either way, the method someone chooses just became a data point worth asking about.
Sources:
sciencedaily.com, cannabis.illinois.gov
