This convergent parallel mixed methods study based on Social Ecological Model investigated substance abuse among undergraduate university students at one of the universities in Ethiopia. For quantitative strand of study, data was collected from 422 randomly selected undergraduate students. Data were analysed using Statistical Package for Social Sciences version 17. For qualitative strand, face-to-face interviews were conducted with 17 purposefully selected participants directly involved with students abusing substances. The findings revealed that factors at individual, interpersonal, institutional, community and societal levels affect substance abuse among university students. The study also uncovered loopholes in the policies, guidelines, and programme implementations in the prevention, control, and management of substance abuse at the university. Based on the findings, the researcher developed guidelines based on the findings of the study, the critical literature review, and the inputs from the experts who reviewed the guidelines. The researcher assumes that implementation of the guidelines will reduce substance use and substance abuse among university students. / Health Studies / D. Litt. et Phil. (Health Studies)

This study was designed to determine the prevalence of substance use and risky sexual behaviours among university students in Ethiopia and examine whether personality traits predict substance use and risky sexual behaviours. Using a cross-sectional quantitative design, data were obtained from 2620 undergraduate students selected through stratified multistage sampling. Personality traits were measured through John, Donahue, and Kentle‘s (1991) Big Five Inventories [BFI-44]. Substance use and risky sexual behaviours were assessed using risky behaviour scales adapted from Miller et al. (2004) and Zuckerman and Kuhlman (2000). Statistical analysis was performed using Statistical Package for Social Sciences (SPSS) Version 20 and Analysis of Moment Structure (AMOS) Version 22 software. The findings revealed that 72.18% of the respondents reported that they have used at least one kind of substance in their lifetime and 50.27% of the participants had consumed at least one kind of substance in the past 30 days before the survey. The current prevalence of substance use was 46.3%, 16.1%, 9.9%, 6.8%, and 5.0% for drinking alcohol, chewing khat, smoking shisha, smoking cigarettes and marijuana use respectively. About 40.2% of respondents had sexual intercourse at least once in their lifetime and 25.6% had sex in the past three months before the study. Among sexually active respondents, 35% began sexual intercourse at the age of 17 years old or younger; 64.3% had multiple sexual partners; 53.1% had substance-induced sex, 62.03% had unsafe sex, and 45.3% had casual sex at least once. Males were found to be more at risk of substance use and risky sexual behaviours. Analysis of the structural relation revealed that conscientiousness and agreeableness traits were significant negative predictors and extraversion was a significant positive predictor of substance use and risky sexual behaviours. Neuroticism had a significant direct effect only on substance use. Substance use mediated the effect of personality traits on risky sexual behaviours. There was gender moderation or variation on the effect of personality traits on substance use and risky sexual behaviours. Therefore, the findings may imply that health risk behaviours were highly prevalent among students, which requires special prevention and intervention. Personality traits can be used to identify the vulnerable individuals and design programs aimed at developing behaviours underlying the protective traits. / Psychology / D. Litt. et Phil. (Psychology)