Is the sleep initiating process affected by psychological factors?
The aim of this study was to investigate the effects of psychological factors on sleep initiating process. The Y-G personality test (Y-G), Lazarus-type stress coping inventory (SCI), Zung self-rating depression scale, General health questionnaire, and Sleep health questionnaire were administered to 418 subjects (mean age = 21.13 +/- 8.76 years), and the data were analyzed by multiple regression analysis (stepwise variable reduction method). Self-rating depression scale; Co-Em, Pla, Sel scale in SCI; C, N, O, Co scale in Y-G were significantly included in the final model. The results showed that psychological factors, such as depression, emotion-focused coping behaviour, prudent planning to solve problems, low self-control, small changes of feeling, nervousness, subjectiveness, and cooperativeness are associated with difficulty initiating sleep.
Komada
Y
Y
Graduate School of Human Sciences, Waseda University, Saitama, Japan. yoko@human.waseda.ac.jp
Yamamoto
Y
Y
Shirakawa
S
S
Yamazaki
K
K
D000223:Adaptation, Psychological; D000328:Adult; D003863:Depression / Q000175:diagnosis / Q000523:psychology*; D005260:Female; D006304:Health Status; D006801:Humans; D008297:Male; D010551:Personality; D010555:Personality Inventory; D011340:Problem Solving; D012890:Sleep / Q000502:physiology*; D011795:Surveys and Questionnaires; D013997:Time Factors