CHS hospitalizations increased fivefold after cannabis legalization in Massachusetts, with longer stays and costs more than doubling per admission.
Emergency physicians, hospital administrators, and policymakers evaluating healthcare costs of legalization.
CHS hospital costs rose from $8,520 to $18,714 per admission after legalization
What the researchers found
CHS hospitalizations rose from 0.02% to 0.1% of total admissions after legalization. Length of stay tripled (1 to 3 days), antiemetic use increased, and mean hospitalization cost more than doubled ($8,520 to $18,714 after adjusting for inflation).
Why it matters
CHS is a growing clinical and economic burden that is often underrecognized. As legalization expands, hospitals and policymakers need to account for rising CHS-related costs.
The numbers in context
72 CHS hospitalizations. Length of stay: 3 vs 1 day (p<0.005). Cost: $18,714 vs $7,460 (p<0.0005). Post-legalization predicted increased costs (B=10,131.25, p<0.05).
How the study worked
Retrospective cohort study of patients admitted to a large urban hospital between 2012 and 2021, comparing periods before and after Massachusetts cannabis legalization (December 15, 2016). Examined 72 CHS hospitalizations.
What this study cannot tell us
Single hospital in one city. "Putative" CHS diagnoses may include misclassified cases. Small total number (72). Cannot determine if increase reflects incidence growth or better recognition.
How to read the evidence
Retrospective cohort from a single hospital with small numbers, but clear pre/post comparison with adjusted cost analysis.
When this study was published
Published in 2024 with data from 2012-2021.
The bigger picture
CHS represents a direct, measurable healthcare cost of cannabis legalization. The fivefold increase in admissions and doubling of per-case costs should inform health economic models used in legalization policy debates.
Questions still open
- How much of the increase reflects better recognition versus true incidence growth?
- Would earlier outpatient CHS management reduce hospitalization rates?
Common questions
Did cannabis legalization increase CHS hospitalizations?
How much does a CHS hospitalization cost?
Read the original research
Rising Inpatient Utilization and Costs of Cannabis Hyperemesis Syndrome Hospitalizations in Massachusetts After Cannabis Legalization.
Journal of clinical gastroenterology, 58(3), 247-252
Citation
Marshall, Allison; Fai, Caitlin; Han, John; Yule, Amy M; Jangi, Sushrut. (2024). Rising Inpatient Utilization and Costs of Cannabis Hyperemesis Syndrome Hospitalizations in Massachusetts After Cannabis Legalization.. Journal of clinical gastroenterology, 58(3), 247-252. https://doi.org/10.1097/MCG.0000000000001857
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