title: Trends in detection rates of risky marijuana use in Colorado health care settings.
abstract: BACKGROUND
  Over the past several years, many states, including Colorado, have approved medical marijuana legislation. There is concern that increased access to and visibility of medical marijuana may lead to harmful use.
  
  
  METHODS
  This study examined changes in patients' marijuana use in 12 health care settings through a statewide screening, brief intervention, and referral to treatment (SBIRT) initiative.
  
  
  RESULTS
  Beginning in 2009, the odds of screening positive for risk-prone marijuana use significantly increased, coinciding with dramatic increases in use of Colorado's medical marijuana program. Young males were most likely to screen positive. Among users, there was a small, statistically significant increase in severity of use over time.
  
  
  CONCLUSIONS
  Findings suggest that health care providers may be serving increasing numbers of patients using marijuana for medical or recreational purposes.
authors.affiliation: OMNI Institute, 899 Logan Street, Denver, CO 80203, USA. mrichmond@omni.org
authors.forename: Melissa K
authors.initials: MK
authors.lastname: Richmond
authors.forename: Katie
authors.initials: K
authors.lastname: Page
authors.forename: Laura S
authors.initials: LS
authors.lastname: Rivera
authors.forename: Brie
authors.initials: B
authors.lastname: Reimann
authors.forename: Leigh
authors.initials: L
authors.lastname: Fischer
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003120:Colorado; D003695:Delivery of Health Care / Q000639:trends; D005260:Female; D006801:Humans; D008297:Male; D064086:Medical Marijuana / Q000008:administration & dosage*; D008875:Middle Aged; D012309:Risk-Taking; D012651:Self Medication / Q000706:statistics & numerical data* / Q000639:trends; D015813:Substance Abuse Detection / Q000706:statistics & numerical data* / Q000639:trends
chemical_list: D064086:Medical Marijuana