Dose–response relationship between khat chewing frequency and sleep duration, perceived effects, and academic performance among medical students in Yemen
رابطه دوز-پاسخ بین فراوانی مصرف قات و مدت خواب، اثرات ادراکشده و عملکرد تحصیلی در میان دانشجویان پزشکی یمن
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چکیده
Although khat chewing is common among university students in Yemen, evidence on dose–response relationships between khat chewing frequency and sleep duration, perceived effects, and academic performance remains limited. This study examined these associations among medical students at Thamar University, Yemen. A cross-sectional study was conducted among undergraduate medical students. Data were collected using a structured questionnaire. Khat chewing frequency was categorized as non-use, 1–2 days/week, 3–4 days/week, and 5–7 days/week. Multivariable logistic and linear regression analyses were performed to assess associations, and ordinal trend analyses were used to evaluate dose–response relationships. Adjusted odds ratios (AOR) and regression coefficients (β) with 95% confidence intervals (CI) were reported. Statistical significance was set at p < 0.05. Increasing khat chewing frequency was independently associated with higher odds of short sleep duration (< 6 h). Compared with non-chewers, the adjusted odds of short sleep increased progressively, reaching an AOR of 7.83 (95% CI: 3.70–16.57; P < 0.001) among daily chewers.A significant linear dose–response relationship was also observed (AOR = 1.97, 95% CI: 1.54–2.52; P < 0.001). Perceived-effects scores increased progressively with khat-chewing frequency, with adjusted mean differences of 3.36, 3.73, and 4.94 for 1–2, 3–4, and 5–7 days/week, respectively (all P ≤ 0.001), with a significant linear trend (adjusted β = 1.61, 95% CI: 1.29–1.92; P < 0.001). In contrast, academic performance showed no significant association or linear dose–response relationship with khat chewing (adjusted β = 0.22, 95% CI: −0.46–0.89; P = 0.532). Khat chewing frequency showed clear dose–response associations with short sleep duration and perceived effects among medical students. However, these associations did not translate into measurable differences in academic performance. These findings suggest that the effects of frequent khat use are more evident in sleep and perceived behavioural outcomes than in academic achievement. These findings are consistent with known stimulant-related effects and may extend to similar student populations in comparable settings.
چکیده به فارسی
اگرچه مصرف قات در میان دانشجویان دانشگاههای یمن رایج است، اما شواهد مربوط به روابط دوز-پاسخ بین فراوانی مصرف قات و مدت خواب، اثرات ادراکشده و عملکرد تحصیلی همچنان محدود است. این مطالعه این ارتباطات را در میان دانشجویان پزشکی دانشگاه ذمار، یمن بررسی کرد. یک مطالعه مقطعی در میان دانشجویان کارشناسی پزشکی انجام شد. دادهها با استفاده از پرسشنامه ساختاریافته جمعآوری شد. فراوانی مصرف قات به صورت عدم مصرف، ۱–۲ روز در هفته، ۳–۴ روز در هفته و ۵–۷ روز در هفته دستهبندی شد. برای ارزیابی ارتباطات، تحلیلهای رگرسیون لجستیک و خطی چندمتغیره انجام شد و برای ارزیابی روابط دوز-پاسخ از تحلیل روند ترتیبی استفاده گردید. نسبت شانس تعدیلشده (AOR) و ضرایب رگرسیون (β) با فاصله اطمینان ۹۵٪ (CI) گزارش شد. سطح معناداری آماری در p < 0.05 تعیین شد. افزایش فراوانی مصرف قات به طور مستقل با افزایش شانس مدت خواب کوتاهتر (< ۶ ساعت) همراه بود. در مقایسه با افراد غیرمصرفکننده، شانس تعدیلشده مدت خواب کوتاه به طور پیشرونده افزایش یافت و در میان مصرفکنندگان روزانه به AOR برابر با 7.83 (95% CI: 3.70–16.57؛ P < 0.001) رسید. همچنین یک رابطه خطی دوز-پاسخ معنادار مشاهده شد (AOR = 1.97، 95% CI: 1.54–2.52؛ P < 0.001). نمرات اثرات ادراکشده با افزایش فراوانی مصرف قات به طور پیشرونده افزایش یافت، به طوری که تفاوت میانگین تعدیلشده برای گروههای ۱–۲، ۳–۴ و ۵–۷ روز در هفته به ترتیب 3.36، 3.73 و 4.94 بود (همه P ≤ 0.001) و روند خطی معناداری مشاهده شد (β تعدیلشده = 1.61، 95% CI: 1.29–1.92؛ P < 0.001). در مقابل، عملکرد تحصیلی هیچ ارتباط معنادار یا رابطه خطی دوز-پاسخ با مصرف قات نشان نداد (β تعدیلشده = 0.22، 95% CI: −0.46–0.89؛ P = 0.532). فراوانی مصرف قات ارتباطات دوز-پاسخ آشکاری با مدت خواب کوتاه و اثرات ادراکشده در میان دانشجویان پزشکی نشان داد. با این حال، این ارتباطات به تفاوتهای قابل اندازهگیری در عملکرد تحصیلی منجر نشد. این یافتهها نشان میدهد که اثرات مصرف مکرر قات بیشتر در خواب و پیامدهای رفتاری ادراکشده مشهود است تا در موفقیت تحصیلی. این نتایج با اثرات شناختهشده محرکها سازگار است و ممکن است به جمعیتهای دانشجویی مشابه در شرایط قابل مقایسه نیز تعمیم یابد.
ترجمهی خودکار برای آشنایی سریع؛ برای نقل و ارجاع، متن اصلی ملاک است.
Obadi, A. A., Al‐Adhroey, A. H., Amad, M. A. A., Salman, H. A., Alsaedi, A. M., Al-Yamani, A. A., Mahyoob, E. M., Al-Pai, M. S., & Dughaish, A. A. (2026). Dose–response relationship between khat chewing frequency and sleep duration, perceived effects, and academic performance among medical students in Yemen. Scientific Reports. https://doi.org/10.1038/s41598-026-72988-9
با احترام و بدون توهین، تحقیر، برچسبزنی یا حملهی شخصی با دیگران گفتگو کنید.
از نوشتن هرگونه اطلاعات هویتی یا قابلشناسایی مراجعان، بیماران یا اشخاص ثالث، از جمله نام، شمارهی تماس، تصویر، نشانی، محل کار یا جزئیات منحصربهفرد پرونده خودداری کنید.
اگر دربارهی یک تجربهی بالینی سؤال میکنید، اطلاعات را تا حد ممکن بینام و کلی بیان کنید تا امکان شناسایی فرد وجود نداشته باشد.
این بخش برای یادگیری و گفتوگوی علمی است و جایگزین ارزیابی، تشخیص، مشاوره یا رواندرمانی شخصی نیست.
در شرایط بحران یا خطر آسیب به خود یا دیگران، به این بخش اتکا نکنید و برای دریافت کمک فوری با اورژانس اجتماعی ۱۲۳ یا صدای مشاور بهزیستی ۱۴۸۰ تماس بگیرید.
انتشار تبلیغات، معرفی خدمات شخصی، شمارهی تلفن، شناسهی شبکههای اجتماعی، پیوند تبلیغاتی یا درخواست جذب مراجع در این بخش مجاز نیست.
در بیان ادعاهای علمی، بهویژه دربارهی اثربخشی درمانها، تشخیص یا یافتههای پژوهشی، تا حد امکان نام منبع معتبر، مقاله یا راهنمای علمی را ذکر کنید.
از ارائهی تشخیص قطعی، تجویز درمان یا دارو و توصیههای بالینی شخصی به سایر کاربران خودداری کنید.
پاسخهایی که کارشناسان فکر بنیان میدهند با برچسب «پاسخ فکر بنیان» یا «کارشناس فکر بنیان» نمایش داده میشوند و سایر نوشتهها بیانگر نظر کاربران هستند.
گزارش نوشتهی نامناسب: اگر نوشتهای حاوی نقض محرمانگی، محتوای آسیبزا، توهین، تبلیغ یا تخلف از این قوانین است، گزینهی «گزارش» را انتخاب کنید تا تیم سایت بررسی کند.
Background: Awareness of youth-friendly sexual and reproductive health services (YFSRHS) is an important starting point for enabling young people to identify and seek appropriate sexual and reproductive health information and care. However, awareness of these services may vary across settings, including higher education institutions. Objective: To determine the level of awareness of YFSRHS among undergraduate students at Saint Augustine University of Tanzania (SAUT), Malimbe Campus. Methods: A quantitative descriptive cross-sectional study was conducted among undergraduate students at SAUT Malimbe Campus. Data were collected using a structured, self-administered questionnaire. Of 109 questionnaires distributed, 108 completed questionnaires were included in the analysis. Descriptive statistics were used to summarize students’ awareness and reported sources of information. Results: Of the 108 respondents, 96 (88.9%) reported having heard of YFSRHS, while 12 (11.1%) had not. Social media was the most frequently reported source of information (44.0%), followed by friends or peers (41.0%) and health facilities (36.0%). University programmes and posters or advertisements were reported less frequently. Conclusion: Most respondents had heard of YFSRHS, with social media and peer networks serving as prominent information channels. Strengthening accurate information through these channels, alongside university-based communication, may help address the awareness gap among students who remain unreached.
Quality higher education plays a vital role in sustainable development by equipping graduates with knowledge, competencies, and skills required for economic and societal development. This study examined the relationship between instructional strategies and the employability skills of undergraduate students in the School of Art and Industrial Design at Kyambogo University, Uganda. Specifically, it investigated the relationships between cooperative teaching, collaborative teaching, inquiry/discovery learning, independent study, experiential (authentic) learning, project-based learning, and students’ employability skills. The study adopted a quantitative approach using a correlational research design. Data were collected from 378 third-year undergraduate students using a structured self-administered questionnaire. Pearson’s product-moment correlation and multiple regression analyses were used to determine the direction and statistical associations between instructional strategies and employability skills. Findings showed that cooperative teaching, inquiry/discovery learning, and experiential teaching had positive statistically significant associations with employability skills, whereas collaborative teaching had a negative statistical association. Independent study and project-based teaching had no statistically significant unique associations with employability skills. Inquiry/discovery teaching demonstrated the strongest statistical association with employability skills among the strategies examined. The study concluded that instructional strategies had different statistical associations with employability skills and that learner-centred approaches are most beneficial when they actively engage students in cooperative, inquiry-oriented, and authentic learning experiences aligned with intended graduate outcomes. The study recommended strengthening cooperative, inquiry, and experiential teaching through structured group tasks, inquiry-based activities, and authentic practical experiences. It further recommended improving the design and implementation of collaborative, independent, and project-based learning to enhance their contribution to graduate employability skills.
Over the last decade, there has been a visible surge of students participating in and leading different forms of activism. Following the cultural reckoning of 2020, the United States saw a rise in awareness and engagement in activism among young individuals. Continuing this trend, higher education institutions have seen an increase in on-campus demonstrations in recent years. Given the recent increase in activism, political engagement, and the globalization of social issues, this study examined how attitudes, beliefs, individual factors, and prior behaviors relate to undergraduate students’ willingness to engage in different forms of activism (i.e., conventional and high-risk). Across both forms of activism, institutional advocacy (i.e., the behavioral targeting of institutional racism) was the most consistent unique predictor of a student's willingness to engage in activism. Need for cognition and individual advocacy were significantly and positively related to conventional activism, whereas political orientation was negatively related to it. Social justice orientation was significantly and negatively related to high-risk activism.
This study addresses the critical deficiency in speaking skills among university students, a challenge primarily attributed to the reliance on traditional teaching methods and the limited time allocated for authentic verbal practice within the classroom. The research aims to construct a comprehensive theoretical framework for the Flipped Classroom strategy and identify the pedagogical and linguistic justifications for its implementation in developing speaking skills, while providing practical procedural recommendations for its integration into higher education. Adopting a descriptive-analytical approach through a critical review of educational literature, the findings reveal that the flipped model significantly enhances students' fluency, linguistic accuracy, and capacity for spontaneous expression. Furthermore, the model fosters increased motivation and active participation by granting learners the autonomy to progress at their own pace, as pre-class preparation helps mitigate "language anxiety" and bolsters confidence during real-time communicative interactions. Despite these advantages, the research identifies several implementation challenges, most notably the digital divide, potential cognitive overload, and the necessity for intensive faculty training in digital instructional design. Ultimately, the study concludes that the Flipped Classroom represents a fundamental philosophical shift that redefines educational roles, transforming class time from passive instruction into a dynamic "living linguistic laboratory" focused on intensive communicative practice.
The purpose of this research is to analyze the economic self-management strategies used by students of the Faculty of Business Sciences of the Technical University of Machala during their academic training; Interest in this study arose from the need to understand how students face economic difficulties that arise in their training. A mixed approach was applied and a survey was used on a representative sample of 367 students, identifying the main source of income for a part of the student population, evidencing alternatives to sustain their expenses and reduce their economic dependence. The most used strategies were observed when they go through difficult situations and if the income is sufficient to cover their expenses, reflecting the existence of limitations and conditioning the way of organizing their resources and decision making. Likewise, it was identified that students usually perceive an impact. in their academic performance. The results allowed us to understand the economic dynamics experienced by university students and provide information for the design of institutional strategies that contribute to strengthening permanence, well-being and academic success.