RT Journal Article
T1 Sleep and Depressive Symptoms in the Morningness/Eveningness-Suicidal Ideation Relationship Depend on School Shift in Mexican Adolescents
A1 Arrona Palacios, Arturo
A1 Díaz Morales, Juan Francisco
A1 Parra Robledo, Zaida
A1 Adan, Ana
AB The aim was to analyze the morningness/eveningness (M/E) effect on suicidal ideation through sleep and depressive symptoms mediators with school shift (i.e., morning and afternoon) as moderator. In this study, 586 Mexican adolescents, with a mean age of 16.31 ± 0.92, from a public high school in a double-shift school system (298 from the morning shift and 288 from the afternoon shift) participated. Measurements of sleep, morningness/eveningness (circadian preference), depressive symptomology, and suicidal ideation were completed. Adolescents in the afternoon shift reported a later rise time, bedtime, greater time in bed sleep length, and less social jet lag than in the morning shift. Considering the moderated-mediated analysis, circadian preference and suicidal ideation were mediated by both depressive symptoms and school day’s sleep length in the morning shift. In the afternoon shift, no mediation effect was significant. When weekend sleep length was considered in the model, only depressive symptoms had a mediating effect between circadian preference and suicidal ideation in the morning shift; no significant mediating effect was found on the afternoon shift. The results suggest that an afternoon school schedule may act as a protective factor for the adolescent’s mental health and may represent a viable option for future interventions.
PB MPDI
SN 2077-0383
YR 2021
FD 2021-10-13
LK https://hdl.handle.net/20.500.14352/5073
UL https://hdl.handle.net/20.500.14352/5073
LA eng
NO J.F.D.-M. is supported by the Spanish Ministry of Economy, Industry, and Competitiveness (Grant PSI2016-76552) and the Spanish Ministry of Science and Innovation (Grant PID2020-116600RB I00/AEI/10.13039/501100011033). A.A. is supported by the Spanish Ministry of Economy, Industry, and Competitiveness (Grant PSI2015-65026), the Spanish Ministry of Economy and Business (PSI2017-90806-REDT), and the Spanish Ministry of Science and Innovation (Grant PID2020-117767GB-I00/AEI/10.13039/501100011033).
NO Ministerio de Economía, Industria y Competitividad (España) 
NO Ministerio de Ciencia, Innovación y Universidades (España) 
DS Docta Complutense
RD 7 jul 2025