Effect of delayed sleep phase during university life on the daytime functioning in work life after graduation

Shoichi Asaoka*, Yoko Komada, Sayaka Aritake, Yuko Morita, Kazuhiko Fukuda, Yuichi Inoue

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Objective: To examine the effects of changes in sleep phase on the daytime functioning of new university graduates. Methods: Questionnaire data of university students (n = 745) and university graduates working full time (n = 360) were analyzed to explore sleep phase changes during this life stage. The newly graduated full-time workers (n = 117) were divided into 2 (bedtime at investigation: earlier/later) × 2 groups (bedtime at one year prior to investigation: earlier/later), and depressive symptoms and health-related quality of life were compared among groups. Results: New university graduates experienced ~1 h of sleep phase advancement and shortened time in bed compared to one year before investigation. In addition, those who experienced such sleep changes showed larger daytime dysfunction. Conclusion: Prevention of extreme sleep phase delay during university days might be helpful for students' adaptation to work environment after graduation.

Original languageEnglish
Pages (from-to)1155-1158
Number of pages4
JournalSleep Medicine
Volume15
Issue number9
DOIs
Publication statusPublished - 2014

Keywords

  • Delayed sleep phase
  • Depressive symptom
  • Full-time workers
  • New university graduate
  • Quality of life
  • University students

ASJC Scopus subject areas

  • Medicine(all)

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