Publications by authors named "Cas Barendregt"

Introduction: Randomized controlled trials have demonstrated the effectiveness of workplace smoking cessation programs. However, with low participation rates reported, it is important to understand the barriers and facilitators for the reach and participation of employees in workplace smoking cessation programs. The objective of the present study is to uncover the needs of employees regarding reach and participation when implementing a workplace program to address smoking cessation.

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Randomized studies have shown that financial incentives can significantly increase the effect of smoking cessation treatment in company settings. Evidence of effectiveness alone is, however, not enough to ensure that companies will offer this intervention. Knowledge about the barriers and facilitators for implementation in the workplace is needed, in order to develop an implementation strategy.

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This study allocated 201 (nearly) daily users of heroin and/or crack into four groups, depending on their addiction care participation. Earlier studies have compared treatment groups and nontreatment groups. In this study the treatment group is divided into three categories: (1) drug users in contact with only treatment agencies--i.

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The rise of mobile phone dealing in the retail market of heroin and cocaine in the city of Rotterdam is described. Multiple methods were used for the study, including analysis of street survey data (1998, 2000, 2003), qualitative and quantitative analysis of fieldwork data, and semi-open interviews with drug users and key informants. In 2000, 70% of the respondents to a street survey bought drugs from a mobile dealer.

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Snowball sampling and targeted sampling are widely applied techniques to recruit samples from hidden populations, such as problematic drug users. The disadvantage is that they yield non-probability samples which cannot be generalised to the population. Despite thorough preparatory mapping procedures, selection effects continue to occur.

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Decreasing the number of homeless drug users is one of the main characteristics of inner city drugs policy. The present study selected an urban-ethnographic perspective (the subculture theory) in order to explore why one drug user is homeless and another 7 not, and to attempt to describe and define the homeless and their immediate social environment. These issues were formulated into the following research questions: 1.

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The Rotterdam Drug Monitoring System used survey data, fieldnotes and interviews with staff to investigate the functioning of four (out of six) consumption rooms in Rotterdam. The results show that for most drug users, access to the drug consumption room results in less frequent drug use in public places and more time and rest. Pass holders value being able to use drugs safely inside, and make use of the additional services provided, such as refreshments, washing/showering facilities and talking with others about their personal problems.

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