We found a significant relationship between using cell phones late at night and tiredness (P = 0.04). However, we did not find a significant relationship between using cell phones at night and sleep quality (based on the questionnaire and PSQI) (P = 0.23). However, the relationship between perceived stress and sleep quality was statistically significant (P = 0.001)
Subjective sleep quality 17 (4.68) 12 (3.42) .7
Use of sleep medications (at least once a week) 20 (5.52) 13 (3.68) .12
Daytime dysfunction (at least once a week) 33 (9.24) 22 (6.16) .18
Poor sleep quality 31 (8.7) 21 (5.8) .23 study.