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Related Concept Videos

Longitudinal Research02:20

Longitudinal Research

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Sometimes we want to see how people change over time, as in studies of human development and lifespan. When we test the same group of individuals repeatedly over an extended period of time, we are conducting longitudinal research. Longitudinal research is a research design in which data-gathering is administered repeatedly over an extended period of time. For example, we may survey a group of individuals about their dietary habits at age 20, retest them a decade later at age 30, and then again...
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Drug dependence, abuse, and addiction are complex phenomena that can precipitate various abnormal states. Physical dependence refers to a state of pharmacological adaptation to a drug. This adaptation often results in tolerance—a reduced response to the drug after repeated administrations. When the drug use is abruptly stopped, withdrawal symptoms occur due to the body's need to readjust from the pharmacologically induced imbalance. However, tolerance and withdrawal symptoms do not...
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Longitudinal Studies01:26

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Longitudinal studies are also widely used in other medical and social science fields. For instance, in cardiovascular research, they can monitor patients' health over decades to identify risk factors for heart disease, such as high cholesterol or smoking, and evaluate the long-term effectiveness of preventive measures. Similarly, in mental health studies, researchers might follow individuals from adolescence into adulthood to understand the development and progression of conditions like...
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Stimulants are substances that enhance neural activity and elevate dopamine levels in the brain, leading to their highly addictive nature. These drugs include cocaine, amphetamines, MDMA, caffeine, and nicotine, each with distinct mechanisms of action and varied health implications.
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Attention-Deficit/Hyperactivity Disorder01:30

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Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by persistent inattention, hyperactivity, and impulsivity. It affects approximately 5-8% of children globally, with around 60-70% of cases persisting into adulthood. ADHD has significant implications for educational attainment, social interactions, and occupational success.
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Stress and Mental Health01:30

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Chronic stress profoundly affects mental health, significantly influencing mood, behavior, and overall quality of life. Research closely links chronic stress with mental health conditions such as depression, anxiety, and substance use disorders. Ongoing exposure to stress can lead to physiological and psychological changes, initiating a cycle of emotional distress and maladaptive coping mechanisms.
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A General Method for Evaluating Deep Brain Stimulation Effects on Intravenous Methamphetamine Self-Administration
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Does methamphetamine use increase violent behaviour? Evidence from a prospective longitudinal study.

Rebecca McKetin1, Dan I Lubman, Jake M Najman

  • 1Centre for Research on Ageing, Health and Wellbeing, Australian National University, Canberra, Australian Capital Territory, Australia; National Drug and Alcohol Research Centre, University of New South Wales, Sydney, New South Wales, Australia.

Addiction (Abingdon, England)
|January 10, 2014
PubMed
Summary
This summary is machine-generated.

Methamphetamine use is linked to increased violent behavior in a dose-dependent manner. While psychotic symptoms elevate this risk, the association between methamphetamine and violence is largely independent of these symptoms.

Keywords:
Amphetaminecomorbiditymethamphetaminepsychosisschizophreniasubstance use

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Area of Science:

  • Psychiatry
  • Addiction Medicine
  • Criminology

Background:

  • Methamphetamine dependence is a significant public health concern.
  • Understanding factors contributing to violent behavior among users is crucial for intervention.

Purpose of the Study:

  • To investigate the relationship between methamphetamine use and violent behavior.
  • To determine if methamphetamine-induced psychotic symptoms mediate this association.

Main Methods:

  • A longitudinal prospective cohort study involving 278 participants with methamphetamine dependence.
  • Fixed-effects analysis of four 1-month observation periods.
  • Assessment of violent behavior, methamphetamine use, other substance use, and psychotic symptoms using validated scales.

Main Results:

  • A dose-related increase in violent behavior was observed with higher days of methamphetamine use.
  • Psychotic symptoms were associated with increased odds of violence, accounting for 22-30% of the methamphetamine-related risk.
  • Heavy alcohol consumption also significantly increased the risk of violent behavior.

Conclusions:

  • Methamphetamine use is independently associated with a dose-dependent increase in violent behavior.
  • The link between methamphetamine and violence is largely independent of psychotic symptoms.
  • Co-occurring heavy alcohol use is an additional risk factor for violence in this population.