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BACKGROUND Neuroenhancement is the use of substances by healthy subjects to enhance mood or cognitive function. The prevalence of neuroenhancement among Swiss university students is unknown. Investigating the prevalence of neuroenhancement among students is important to monitor problematic use and evaluate the necessity of prevention programs. STUDY AIM(More)
The use of prescription or recreational drugs for cognitive enhancement (CE) is prevalent among students. However, the prevalence of CE among Swiss school students is unknown. We therefore performed a cross-sectional online survey including ≥ 16-year-old students from bridge-year schools (10th grade), vocational schools, and upper secondary schools(More)
Bayesian integrated population modelling provides a natural tool for estimating immigration into a single study population when we have indices of population size, mark–recapture data and fecundity data. We consider the choice of both the parametrization of immigration and its prior. Using a simulation study for a model that is typical of those used for(More)
BACKGROUND Smoking rates in methadone-maintained patients are almost three times higher than in the general population and remain elevated and stable. Due to the various negative health effects of smoking, nicotine dependence contributes to the high mortality in this patient group. The purpose of the current study was to investigate Swiss methadone and(More)
The ongoing bioethical debate on pharmacological cognitive enhancement (PCE) in healthy individuals is often legitimated by the assumption that PCE will widely spread and become desirable for the general public in the near future. This assumption was questioned as PCE is not equally save and effective in everyone. Additionally, it was supposed that the(More)
The present review focuses on articles dealing with clinical or epidemiological studies on the association between cannabis use and psychoses. Included are all articles published since 1990 that were located by a Medline or Psyclit data-base research and those earlier articles that are needed for a correct understanding of studies published during the index(More)
The term club drugs refers to a variety of substances which are frequently used in the context of dance events or raves. MDMA - or more commonly ecstasy -, amphetamines, especially methamphetamine, ketamine and newly also GHB (and analoga) are frequently used club drugs. The spectrum of psychoactive effects of theses substances is broad and ranges from(More)
Pharmacological cognitive enhancement (PCE) refers to the nonmedical use of prescription or recreational drugs to enhance cognitive performance. Several concerns about PCE have been raised in the public. The aim of the present study was to investigate students' attitudes toward PCE. Students at three Swiss universities were invited by e-mail to participate(More)
OBJECTIVE The aim of the present study was to compare self-reported reasons for cannabis use in patients with schizophrenia with those of matched healthy controls. METHODS Thirty-six stable outpatients with schizophrenia treated with atypical antipsychotics and 36 matched controls were included. They completed a questionnaire exploring 15 common reasons(More)
BACKGROUND The use of cannabis and other illegal drugs is particularly prevalent in male young adults and is associated with severe health problems. This longitudinal study explored variables associated with the onset of cannabis use and the onset of illegal drug use other than cannabis separately in male young adults, including demographics, religion and(More)