Stress Research Institute, Psychology Department, Stockholm University, Stockholm, Sweden; Department of Medicine Solna, Division of Clinical Medicine, Karolinska Institutet, Stockholm, Sweden; Department of Psychology, Macquarie University, NSW, Australia.
Stress Research Institute, Psychology Department, Stockholm University, Stockholm, Sweden; Department of Clinical Neuroscience, Division of Psychology, Stockholm, Karolinska Institutet, Stockholm, Sweden.
Sleep Med. 2021 Dec;88:262-266. doi: 10.1016/j.sleep.2021.10.028. Epub 2021 Oct 30.
Unhealthy sleep duration, either short or long, is associated with worse health and central subjective dimensions of sleep and health such as fatigue. It has been argued that the link between sleep duration and health may depend on the quality of the slept hours, and on its functional impact (ie, fatigue). The present study therefore assessed whether the relationship between last night's sleep duration and general self-rated health (SRH) differs as a function of sleep quality, and secondly, whether current fatigue and sleep quality are factors linking sleep duration and SRH. The present cross-sectional dataset involved 1304 individuals (57% female, M = 28.8, range 18-79). Participants completed surveys for general SRH, previous night's sleep duration and sleep quality, and current fatigue. Results showed the expected inverted U-shaped (ie, quadratic) relation between last night's sleep duration and SRH and a linear relation between last night's sleep quality and SRH. However, long sleep duration was only associated with poorer SRH in individuals who also reported poor sleep quality. Further, the quadratic relationship between sleep duration and SRH was partially mediated by fatigue and sleep quality. The results of this multi-study analysis suggest that SRH is particularly poor in those who slept both long and with poor quality the night before, while good sleep quality may protect those with a long sleep duration from poor SRH. Thus, last night's long sleep does not seem to be associated with poor subjective health unless it is coupled with poor sleep quality. Furthermore, fatigue and sleep quality are potential pathways linking short and long sleep duration with SRH. Different dimensions of sleep interact in their association with health, and future research will benefit from an integrative approach.
睡眠时长不健康，无论是过长还是过短，都会导致健康状况恶化，并影响睡眠和健康的中心主观维度，如疲劳。有人认为，睡眠时长与健康之间的联系可能取决于睡眠时间的质量，以及其对功能的影响（即疲劳）。因此，本研究评估了昨晚的睡眠时间与一般自我报告健康状况（SRH）之间的关系是否因睡眠质量的不同而有所差异，其次，评估当前的疲劳和睡眠质量是否是将睡眠时长与 SRH 联系起来的因素。本横断面数据集涉及 1304 人（女性占 57%，M=28.8，年龄范围为 18-79 岁）。参与者完成了一般 SRH、前一晚睡眠时长和睡眠质量以及当前疲劳的调查。结果表明，昨晚的睡眠时长与 SRH 之间呈预期的倒 U 形（即二次）关系，而昨晚的睡眠质量与 SRH 之间呈线性关系。然而，只有在报告睡眠质量差的个体中，长睡眠时长才与较差的 SRH 相关。此外，睡眠时长与 SRH 之间的二次关系部分通过疲劳和睡眠质量来介导。这项多研究分析的结果表明，睡眠质量差且睡眠时间长的人主观健康状况特别差，而睡眠质量好的人即使睡眠时间长也不会出现较差的 SRH。因此，只有当昨晚的睡眠质量差时，长睡眠时长似乎才与较差的主观健康状况相关，否则，长睡眠时长不会与较差的主观健康状况相关。此外，疲劳和睡眠质量是将短睡眠时长和长睡眠时长与 SRH 联系起来的潜在途径。不同的睡眠维度在与健康的关联中相互作用，未来的研究将受益于综合方法。
