| Abstract [eng] |
The aim of the study was to assess the relationship between sleep quality, caffeine intake and depression, anxiety and stress symptoms in students. The study involved 190 students, of whom 157 were female with a mean age of 23.55 years (SN 1.916 and 33% male with a mean age of 24.21 years (SN 2.23). The Pittsburg sleep quality index (Buysse et al., 1989) was used to assess sleep quality, and DASS-21 (Henry & Crawford, 2005) was used to assess symptoms of depression, anxiety and stress in the Lithuanian student population (Truskauskaite-Kuneviciene, 2021; Gelezelyte, et al., 2021). The mean of 7.28 (SD = 2.581) sleep quality in this sample indicates that the majority of students have poor sleep quality (PMKI > 5). 73.2% of females and 75.8% of males experience sleep disturbances (PMKI > 5), while 26.8% of females and 24.2% of males have normal sleep (PMKI ≤ 5). The mean score for the depression scale is 7.51 (SD = 5.47), for the anxiety scale 7.63 (SD = 4.99) and for the stress scale 10.81 (SD = 5.04). There was a statistically significant association between sleep quality and depression (rs = 0.182, p = 0.012), anxiety (rs = 0.186, ps = 0.010) and stress (rs = 0.214, p = 0.003), indicating that the higher the depression, anxiety, and stress scores on the DASS-21, the higher the PSQI score (poorer sleep quality) and vice versa. On average, students drank about 168.17 mg (SD = 78.595) of caffeine per day. The most common sources of caffeine were coffee (79%) and tea (50.5%). There was no significant association of sleep quality with the amount, source and timing of caffeine consumption. In this study, caffeine did not modify the relationship between depression, anxiety and stress symptoms and sleep quality, i.e. it did not predict better or worse sleep quality.  . |
