Elsevier, Sleep Medicine, 10(15), p. 1251-1258
DOI: 10.1016/j.sleep.2014.04.010
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Background: Sleep patterns face important changes during adolescence. This can have implications for the immune system, which is regulated by the sleep–wake cycle; however, most studies relating sleep and immune system have been conducted on adults. Objective: To study the relationships between sleep duration, immune cell counts, and cytokines in Eu- ropean adolescents participating in the HELENA Cross-Sectional Study. Methods: Adolescents(12.5–17.5years;n=933;53.9%girls)weregroupedaccordingtoself-reportedsleep duration into