Auteur M. VAN LAAR

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4-Fluoroamphetamine in the Netherlands: more than a one-night stand

F. LINSEN ; R. P. J. KONING ; M. VAN LAAR ; R. J. M. NIESINK ; M. W. J. KOETER ; T. M. BRUNT | 2015
Dans Addiction (Vol.110, n°7, July 2015) Article : Périodique

Aims: To investigate the temporal pattern of appearance of a new psychoactive substance (4-fluoroamphetamine) on the Dutch drug market, as well as its patterns of use and effects. Design: Data from the Drug Information and Monitoring System (DI[...]

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Buying cannabis in 'coffee shops'

K. MONSHOUWER ; M. VAN LAAR ; W. A. VOLLEBERGH | 2011
Dans Drug and Alcohol Review (Vol.30, n°2, March 2011) Article : Périodique

ISSUES: The key objective of Dutch cannabis policy is to prevent and limit the risks of cannabis consumption for users, their direct environment and society ('harm reduction'). This paper will focus on the tolerated sale of cannabis in 'coffee s[...]

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Cannabis dependence and peer selection in social networks of frequent users

N. LIEBREGTS ; A. BENSCHOP ; P. VAN DER POL ; M. VAN LAAR ; R. DE GRAAF ; W. VAN DEN BRINK ; D. J. KORF | 2011
Dans Contemporary Drug Problems (Vol.38, n°1, Spring 2011) Article : Périodique

In a Dutch longitudinal study on the dynamics of cannabis dependence, at baseline 600 frequent cannabis users (> = 3 days cannabis use per week in past 12 months) aged 18-30 years were interviewed. Nearly half of all participants (42%) met DSM-I[...]

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Co-ordination of the implementation of the EMCDDA standard guidelines on the drug-related deaths in the EU Member States, and the collection and analysis of information on drug-related deaths. DRD standard version 1.0 field trial report

M. VAN LAAR ; G. CRUTS ; R. HARTNOLL ; J. VICENTE | 2001
Rapport

Data on drug-related deaths count as one of the five epidemiological key-indicators of the EMCDDA to be implemented in the Member States of the European Union. However, figures on drug-related deaths are not directly comparable between countries[...]

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Cross-sectional and prospective relation of cannabis potency, dosing and smoking behaviour with cannabis dependence: an ecological study

P. VAN DER POL ; N. LIEBREGTS ; T. M. BRUNT ; J. VAN AMSTERDAM ; R. DE GRAAF ; D. J. KORF ; W. VAN DEN BRINK ; M. VAN LAAR | 2014
Dans Addiction (Vol.109, n°7, July 2014) Article : Périodique

Background and Aims: Increased delta-9-tetrahydrocannabinol (THC) concentrations in cannabis may lead to higher THC exposure, cannabis dependence and treatment need, but users may also adapt the actual intake of THC through reduced inhalation of[...]

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Drug use changes at the individual level: Results from a longitudinal, multisite survey in young Europeans frequenting the nightlife scene

M. GRABSKI ; J. WALDRON ; T. P. FREEMAN ; C. MOKRYSZ ; R. J. J. VAN BEEK ; P. VAN DER POL ; B. HAUSPIE ; N. DIRKX ; J. SCHROOTEN ; T. H. ELGAN ; K. FELTMAN ; E. BENEDETTI ; G. SCALIA TOMBA ; F. FABI ; S. MOLINARO ; J. GRIPENBERG ; T. VAN HAVERE ; M. VAN LAAR ; H. V. CURRAN | 2022
Dans European Addiction Research (Vol.28, n°2, March 2022) Article : Périodique

BACKGROUND: Monitoring emerging trends in the increasingly dynamic European drug market is vital; however, information on change at the individual level is scarce. In the current study, we investigated changes in drug use over 12 months in Europ[...]

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Estimating problem drug use prevalence at national level : comparison of three methods

F. SMIT ; M. VAN LAAR ; L. WIESSING | 2006
Périodique

ENGLISH : Aims: Throughout the European Union efforts are made to obtain national estimates of problem drug use. These estimates are required for policy making. Given the importance of the estimates, much depends on their validity. Here we use[...]

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Limitations to the Dutch cannabis toleration policy: Assumptions underlying the reclassification of cannabis above 15% THC

M. VAN LAAR ; P. VAN DER POL ; R. NIESINK | 2016
Dans International Journal of Drug Policy (Vol.34, August 2016) Article : Périodique

The Netherlands has seen an increase in Delta9-tetrahydrocannabinol (THC) concentrations from approximately 8% in the 1990s up to 20% in 2004. Increased cannabis potency may lead to higher THC-exposure and cannabis related harm. The Dutch govern[...]

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Mental health differences between frequent cannabis users with and without dependence and the general population

P. VAN DER POL ; N. LIEBREGTS ; R. DE GRAAF ; M. TEN HAVE ; D. J. KORF ; W. VAN DEN BRINK ; M. VAN LAAR | 2013
Dans Addiction (Vol.108, n°8, August 2013) Article : Périodique

Aims: To compare the prevalence of mental disorders between frequent cannabis users with and without dependence and the general population. Design: Cross-sectional comparison of interview data. Setting: Enriched community sample of frequent ca[...]

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Persistence and desistance in heavy cannabis use: the role of identity, agency, and life events

N. LIEBREGTS ; P. VAN DER POL ; R. DE GRAAF ; M. VAN LAAR ; W. VAN DEN BRINK ; D. J. KORF | 2015
Dans Journal of Youth Studies (Vol.18, n°5, 2015) Article : Périodique

Many cannabis users 'mature out' of their drug use, and factors of cannabis use cessation have been identified. However, very little in-depth knowledge is available about the mechanisms underlying this phenomenon. Criminological studies have gai[...]

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Polydrug use typologies of regular ecstasy users visiting electronic dance music events: A latent class analysis

R. J. J. VAN BEEK ; M. BLANKERS ; M. KLEINJAN ; J. WALDRON ; M. GRABSKI ; T. FREEMAN ; V. CURRAN ; P. VAN DER POL ; M. VAN LAAR | 2024
Dans European Addiction Research (Vol.30, n°1, February 2024) Article : Périodique

INTRODUCTION: Polydrug use patterns among young adults using ecstasy vary, as well as their willingness to change them. Polydrug use patterns are likely associated with different adverse health outcomes. It is unknown whether polydrug use patter[...]

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Population size estimate of people with high-risk opioid use and an exploration of people with high-risk use of crack cocaine and other drugs in the Netherlands. OPAAK project. Final report

L. STRADA ; T. MARTINELLI ; D. VAN DER GOUWE ; S. KORTELING ; G. CRUTS ; M. GROOTHUIZEN ; I. BAKKER ; M. BUSZ ; M. VAN LAAR | 2025
Rapport

Aims : The OPAAK study aimed to provide up-to-date information on the populations of people with high-risk use of opioids and crack cocaine, while also identifying emerging groups of people with high-risk drug use. The study was structured into[...]

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Prevention and reduction of health-related harm associated with drug dependence. An inventory of policies, evidence and practices in the EU relevant to the implementation of the Council Recommendation of 18 June 2003. Synthesis report

D. VAN DER GOUWE ; M. GALLA ; A. VAN GAGELDONK ; E. CROES ; J. ENGELHARDT ; M. VAN LAAR ; M. BUSTER | 2006
Rapport

FRANÇAIS : Buts et objectifs : Suite à un appel d'offres ouvert, la Commission européenne a décidé d'engager les services de l'Institut Trimbos pour collecter et analyser les informations de base d'un rapport de la Commission conformément au P[...]

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Purity, adulteration and price of drugs bought on-line versus off-line in the Netherlands

D. VAN DER GOUWE ; T. M. BRUNT ; M. VAN LAAR ; P. VAN DER POL | 2017
Dans Addiction (Vol.112, n°4, April 2017) Article : Périodique

Background and aims: On-line drug markets flourish and consumers have high expectations of on-line quality and drug value. The aim of this study was to (i) describe on-line drug purchases and (ii) compare on-line with off-line purchased drugs re[...]

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The DRD-Standard, version 3.0. EMCDDA standard protocol for the EU member states to collect data and report figures for the key indicator drug-related deaths by the standard Reitox tables : Project CT.02.P1.05

M. VAN LAAR ; G. CRUTS ; J. VICENTE ; N. FROST ; R. HARTNOLL | 2002
Rapport

The DRD-Standard is the Drug-Related Deaths Standard for the Member States of the European Union. It is the standard protocol for extracting and collecting data, reporting key figures to the EMCDDA and sending data to the EMCDDA. Each year, data[...]

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