Clarification of the factor structure of the 12-item General Health Questionnaire among Japanese adolescents and associated sleep status

Hiroyuki Suzuki, Yoshitaka Kaneita, Yoneatsu Osaki, Masumi Minowa, Hideyuki Kanda, Kenji Suzuki, Kiyoshi Wada, Kenji Hayashi, Takeo Tanihata, Takashi Ohida

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

If the factors affecting the mental health status of adolescents and their association with sleep status could be clarified, this information would be helpful for formulating lifestyle and healthcare guidance for the promotion of healthy growth and the prevention of mental problems in these individuals. The purpose of this study was to clarify (1) the factor structure of the 12-item General Health Questionnaire (GHQ-12), and (2) the associations between the factors extracted from this questionnaire and lifestyle, in particular sleep status, by using a representative sample population of Japanese adolescents. One hundred three thousand sixty hundred fifty self-administered questionnaires were collected from students enrolled in junior high and high schools in Japan. Of these questionnaires, 99,668 were analyzed. Sleep duration, subjective sleep assessment, bedtime, and insomnia symptoms of these students over the past month were studied to investigate sleep status. The factor analyses yielded two factors: depression/anxiety and loss of positive emotion. Sleep duration of less than 7. h was found to be associated with both depression/anxiety and loss of positive emotion, whereas sleep duration of 8. h or more was associated only with loss of positive emotion. Subjective sleep assessment and insomnia symptoms were associated with both depression/anxiety and loss of positive emotion. It was demonstrated that two underlying factors of mental health status were associated with differences in sleep status. In order to improve the mental health status of adolescents, it is important to provide guidance about sleep and lifestyle habits according to the mental health status of the individual.

Original languageEnglish
Pages (from-to)138-146
Number of pages9
JournalPsychiatry research
Volume188
Issue number1
DOIs
Publication statusPublished - Jun 30 2011
Externally publishedYes

Keywords

  • Epidemiology
  • Factor analysis
  • General Health Questionnaire (GHQ-12)
  • Sleep duration
  • Subjective sleep assessment

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Biological Psychiatry

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