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Related Experiment Video

Updated: Oct 23, 2025

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Cognitive improvement among abstinent methamphetamine users: A 2-year prospective longitudinal study.

Tong-Yu Wang1,2,3, Teng-Teng Fan1, Julia M Lappin4

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Methamphetamine (MA) abstinence may improve cognitive function. Six months of MA abstinence was associated with a significant increase in cognitive scores, suggesting potential for recovery.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Addiction Medicine

Background:

  • Chronic methamphetamine (MA) use adversely impacts cognitive function.
  • Limited longitudinal data exists for abstinent MA users.
  • Prospective studies are needed to understand cognitive recovery in MA abstinence.

Purpose of the Study:

  • To assess cognitive function in MA users with varying durations of abstinence.
  • To investigate the relationship between MA abstinence and cognitive performance over time.

Main Methods:

  • Prospective longitudinal study with 358 MA users in China.
  • Baseline and four follow-up interviews over 2 years.
  • Montreal Cognitive Assessment (MoCA) for cognitive function measurement.
  • Generalized estimating equation (GEE) analysis for longitudinal data.

Main Results:

  • Significant differences in MoCA scores observed over 24 months of follow-up.
  • Six months of MA abstinence predicted a significant increase in MoCA scores (0.66, p=.002).
  • Longer abstinence periods (12-24 months) showed trends towards increased MoCA scores, but not statistically significant.

Conclusions:

  • Cognitive function may improve after 6 months of methamphetamine abstinence.
  • Findings support interventions to reduce MA use and promote cognitive recovery.
  • Long-term follow-up in a large sample of MA users provides valuable insights.