Background Heavy drinking is highly comorbid with nicotine and marijuana use among young adults. Yet, our knowledge about the longitudinal effects of nicotine and marijuana use (including onset timing and quantity/frequency) on heavy drinking and whether the effects vary by gender is very limited. This study aims to characterize gender-specific developmental trajectories of multiple substance use and examine gender differences in the effects of nicotine and marijuana use on heavy drinking. Methods We conducted secondary analysis on 8 waves of data from 850 high risk youth who were recruited as ninth graders with low GPA in an economically disadvantaged school district in the Midwest, and were followed up annually to young adulthood. Onset ages and quantity/frequency of multiple substance use were assessed by a self-report questionnaire at each wave. The time-varying effect model and linear mixed model were adopted for statistical analysis. Results Males’ levels of heavy drinking, nicotine use, and marijuana use tended to grow persistently from adolescence to emerging adulthood. Females, on the other hand, only gradually increased their nicotine use across time while maintaining low levels of heavy drinking and marijuana use. Controlling for the early onset status of alcohol use, early onset statuses of nicotine use and marijuana use both added additional risk for heavy drinking; late onset marijuana users were also at higher risk for heavy drinking than nonusers of marijuana. Controlling for substance use onset statuses, higher quantity/frequency of nicotine and marijuana use both contributed to more involvement in heavy drinking. We also found that the effect of nicotine use quantity on heavy drinking was greater among males. Conclusions Our study demonstrates the longitudinal effects of onset timing and quantity/frequency of nicotine and marijuana use on heavy drinking. Our analysis of gender differences also identifies female youth’s nicotine use and male youth’s co-use of nicotine and alcohol as two important areas for future prevention and intervention work.

ABSTRACT. Objective: This study aimed to (a) characterize genderspecifi c risk of onset of alcohol, nicotine, and marijuana use developmentally; (b) investigate the effects of early-onset status and frequency of nicotine and marijuana use on alcohol outcomes, controlling for the effects of alcohol use; and (c) examine gender differences in the developmental trajectories of alcohol outcomes and the effects of nicotine and marijuana use on alcohol outcomes. Method: This study conducted secondary analysis on a longitudinal study that recruited at-risk youth through fathers' drunk-driving records and door-to-door canvassing in the midwestern United States. The sample included 160 female-male sibling pairs who were assessed on substance use and Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, diagnosis from early childhood to young adulthood. Results: Although males were at higher risk for being early-onset alcohol users, females tended to be at higher risk for initiating marijuana use at younger ages. When early onset and amount of alcohol use were controlled for, early onset of nicotine and marijuana use did not contribute to alcohol outcomes, but frequencies of nicotine and marijuana use did. We also found the associations of quantity/frequency of alcohol and marijuana use with drinking problems to be stronger among females than among males. Conclusions: Higher frequencies of nicotine and marijuana use may contribute to worse alcohol outcomes above and beyond the effect of alcohol use. Females tend to be at higher risk than males for initiating marijuana use and meeting an alcohol use disorder diagnosis at younger ages as well as being more vulnerable to a negative impact of alcohol and marijuana use. (J. Stud.

Despite the growing interest in extreme sports around the world, researchers have rarely investigated the complex factors that have led to a developed commitment to extreme sports in recent years. Precisely, the social identity of ultramarathoners remains a research niche. The aim of the article is to analyze the impact of a sports event on shaping social identity of ultramarathon runners on the example of Karkonosze Winter Ultramarathon (held in Poland). The qualitative method used in the article-interviews with runners-made it possible to examine the factors that create social identity, among which the motives for participation, sports subculture, and the authenticity of the experience play a key role. The first part of the article describes the theoretical aspects of social identity in sport. The second, empirical part presents the research results supplemented by the statements of the contestants. In this case, the subject of analysis is the motives for participation in a winter ultramarathon and their characteristics. Lastly, the article analyzes the subculture of ultramarathoners and the experience of contestants' authenticity. The investigated winter ultramarathon created the perfect space for creation, deepening and celebrating the social identity of ultramarathoners assessed as a value in itself. The article enriches the present knowledge about the motivation of ultramarathoners because, unlike the results of quantitative research, it presents in-depth responses of runners who were not always concerned by existing research questionnaires.

The aim of the study was to investigate if years of running experience influence the motivations of marathon athletes. An empirical study was conducted during the last (20th) PKO Poznan Marathon, one of the largest and most popular mass running events in Poland, which was held in Poznan (Poland) in October 2019. A total of 493 marathon runners (29% of whom were female, and 71% of whom were male) took part in the cross-sectional study, which used the diagnostic survey method. The questionnaire employed the division of motives from the motivation of marathoners scale (MOMS) by Masters et al., adapted to the Polish language by Dybala. Running motivations have already been analysed for variables such as age, gender and place of residence, but there is a research gap regarding existing research, as the relationship between motivations and running experience has not yet been studied. One-way analysis of variance for independent samples was used to verify statistical hypotheses. Prior to making the relevant calculations, the assumption of homogeneity of variance was checked via Levene’s test. Variances were assessed with an F-test, and if they were unequal, Welch’s correction was applied. Eta squared (η2) was used as a measure of effect size. The calculations carried out showed that running experience was not a statistically significant factor in the motivations of runners taking part in a marathon.

INTRODUCTION:During a pandemic, medical personnel while in contact with patients with suspected/confirmed COVID-19 should wear full personal protective equipment (PPE) for aerosol-generating procedures to reduce the risk of infection. Most studies of intubation in level C PPE conditions have been relatively small. Our aim is to quantify the available data on success rates in order to provide an evidence-based benchmark to gauge performance in the published literature. MATERIAL AND METHODS:A structured literature search was performed with PubMed, Scopus, Embase, Web of Science, and Cochrane databases. The electronic database search was supplemented by searching Google Scholar and by back-searching the reference lists of identified studies for suitable articles. Data were evaluated and extracted by two independent reviewers on the basis of qualitative and quantitative variables of interest. Q statistic and I 2 statistics were used to assess the heterogeneity between the studies. RESULTS:Fifteen randomized controlled trials were included. The use of PPE during intubation as compared with intubation without PPE reduced intubation efficacy (90.0% vs. 97.9%; RR = 0.94; 95% CI: 0.90-0.99; p < 0.001) and increased the procedure time (MD = 7.73; 95%