| Summary: | Associations between grades, stress and sleep quality were explored among university students and sought to find out if demographic factors (i.e., gender, having children, having another university degree, working with school and at which school studying) had weights in the relationship. The factors were expected to significantly explain part of the variance in grades. Further, stress, sleep quality, gender and having another university degree were expected to have stronger predictability of grades, compared to the demographic variables. The University of Akureyri and Reykjavík University collaborated in the study and assisted with data collection, but a total of 279 students participated by answering an online questionnaire. The participants, of which 22.3% were men and 76.5% women, were aged between 18 and 57 years. Using three-stepped hierarchical linear regression, the results demonstrated the five demographic variables to explain significantly 9.1% of the variance in grades, increasing to 12.1% when adding stress and finally, with the addition of sleep quality in the model it explained 14.3%. Having another university degree was the strongest predictor of higher grades, but being a woman, not working with school, and good sleep quality were significant predictors as well. Although explaining part of the variance, stress was not a significant predictor of grades in the model. Keywords: Academic performance, sleep quality, stress, demographics, students Tengsl einkunna, streitu og svefngæða voru könnuð meðal háskólanema og athugað hvort lýðfræðilegir þættir (þ.e., kyn, barneignir, önnur gráða á háskólastigi, vinna með námi og skóli sem stundað var nám í) hefðu vægi í sambandinu. Búist var við að þessir þættir skýrðu með marktækum hætti hluta af dreifingu einkunna. Þar að auki var búist við að streita, svefngæði, kyn og það að hafa lokið annarri gráðu á háskólastigi væru sterkari forspárþættir fyrir einkunnir en hinar breyturnar. Háskólinn á Akureyri og Háskólinn í Reykjavík voru samstarfsaðilar ...
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