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Changes in Risk Behaviour Among People With Recent Injecting Drug Use in Oslo 2002-2024.

Eirik Opheim1,2, Kristian Malme3, Olav Dalgard2,3

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This summary is machine-generated.

Sharing of needles and syringes among people who inject drugs significantly decreased in Oslo from 2002 to 2024. However, risk behaviors remain prevalent in younger individuals, highlighting ongoing public health challenges.

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Area of Science:

  • Public Health
  • Infectious Disease Epidemiology
  • Harm Reduction Strategies

Background:

  • Sharing of injecting paraphernalia among people who inject drugs (PWID) is a primary driver of blood-borne infections.
  • Achieving viral hepatitis elimination by 2030 necessitates minimizing risk behaviors within this population.
  • Understanding trends in injecting risk behavior is crucial for targeted public health interventions.

Purpose of the Study:

  • To assess changes in injecting risk behaviors among PWID in Oslo between 2002 and 2024.
  • To identify factors associated with recent risk behaviors over the study period.
  • To inform strategies for reducing transmission of infections among PWID.

Main Methods:

  • Analysis of eight cross-sectional studies conducted among PWID in Oslo from 2002 to 2024.
  • Calculation of prevalence estimates for recent (past 4 weeks) risk behaviors annually.
  • Utilized generalized estimating equations to determine factors associated with recent risk behaviors.

Main Results:

  • 1648 participants were included, with a median age of 39.4 years and 71.7% males.
  • Prevalence of recent needle/syringe sharing decreased from 17.8% in 2002 to 4.2% in 2024.
  • Factors associated with sharing included younger age, daily injecting, and use of mixed heroin/amphetamine.

Conclusions:

  • A significant decline in recent injecting risk behaviors was observed among PWID in Oslo between 2002 and 2024.
  • Despite the overall decline, risk behaviors persist, particularly among younger individuals.
  • Continued harm reduction efforts are essential to further decrease infection transmission.