Recreational Nitrous Oxide Use and Associated Factors among Health Profession Students in France.

The first aim of this study was to investigate the recreational use of nitrous oxide (N 2 O) among health profession students at Montpellier University (France). The second aim was to identify the factors associated with N 2 O use. All students in medicine, dentistry, pharmacy and midwifery of the Montpellier University were contacted by email to participate in the survey. The students answered directly online by filling out anonymously a questionnaire including demographic information and questions about N 2 O, illicit drugs and alcohol use. Ethical approval was granted by the ethics committee of the Montpellier University. The sample comprised 593 students (mean age = 22.3 ± 2.6 yr), with 68.6% of females. Lifetime N 2 O use was reported by 76.6% and frequent alcohol use by 30.5% of the respondents. The lifetime use of cannabis, 'poppers', cocaine, ecstasy and LSD was 26.8%, 54.6%, 9.6%, 10.1% and 2.0% respectively. In multivariate analysis, the substances significantly associated with lifetime N 2 O were alcohol drinking and 'poppers' use. With respect to this self-nominated sample, our results indicate that respondents who were alcohol drinkers, were poppers users, follow longer studies, divert medical products for recreational use or were members of a students' corporation had higher odds of lifetime N 2 O use.