SUMMARY
OBJECTIVE:
In this study, we aimed to evaluate the relationships between Internet
addiction, smartphone addiction, sleep quality, and academic success.
METHODS:
In this cross-sectional study, high-school students were surveyed to evaluate
sleep quality, Internet addiction, and smartphone addiction. Students were
queried about their demographics, and grade averages from the previous term
were taken as an indicator of academic success.
RESULTS:
A total of 1,959 students were enrolled in this study, with 1,034 (52.8%)
girls and 925 (47.2%) boys, and the median age of the participants was 16
(13–21) years. Multivariate analyses found that poor sleep quality in
students who did not have breakfast before going to school was 1.58 times
higher than those who did (p<0.001). Students who stayed in a dormitory
had 1.79 times more poor sleep quality than those who stayed with their
family, and a one-unit increase in the total score of the Young’s Internet
Addiction Test short form resulted in a 1.08-fold increase (both,
p<0.001).
CONCLUSION:
Our study has shown that students’ sleep quality was predicted to be lower if
they stayed in a dormitory and skipped breakfast. In addition, Internet and
smartphone addictions have a negative effect on sleep quality and academic
performance.