Associations have been found between perseverative cognition (PC: worry and rumination) and somatic markers of ill-health. Further studies have reported associations between sleep and both PC and poorer health. As such, sleep disturbance may represent a pathway between PC and ill-health. Therefore, studies assessing the relationship between PC and sleep in non-clinical populations were synthesised. Meta-analyses (k = 55) revealed small- to medium-sized associations between higher PC and poorer sleep quality (SQ, r = -0.28), shorter total sleep time (TST, r = -0.15) and longer sleep onset latency (SOL, r = -0.16). Variations included associations between SQ and rumination (r = -.33) and worry (r = -.23). Associations were stronger in studies measuring SQ via self-report rather than actigraphy, and where SOL and TST outcomes were cross-sectional. Associations with SOL were stronger when outcomes were from non-diary studies and when trait, rather than state PC, was measured, but weaker where studies incorporated more measures of PC. Effect sizes were generally larger where studies were higher quality and being female may act as a protective factor between PC and longer SOL. Therefore, there is a consistent association between PC and sleep which may partially explain the link between PC and ill-health.

中文翻译：

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非临床人群的焦虑与沉思与睡眠之间的关联：系统评价和荟萃分析。

在持久性认知（PC：忧虑和反省）与身体不适的身体标志物之间发现关联。进一步的研究报道了睡眠与PC和更差的健康之间的关联。因此，睡眠障碍可能代表了PC与健康不良之间的一种途径。因此，综合了评估非临床人群中PC与睡眠之间关系的研究。荟萃分析（k = 55）显示较高PC与较差的睡眠质量（SQ，r = -0.28），较短的总睡眠时间（TST，r = -0.15）和较长的睡眠发作潜伏期（SQ，r = -0.28）之间的中小型关联。 SOL，r ＝ -0.16）。变化包括SQ与反省（r = -.33）和忧虑（r = -.23）之间的关联。在通过自我报告而不是书法来衡量SQ的研究中，与SOL和TST结果呈横切关系的关联性更强。当来自非日记研究的结果以及测量的是特质而非状态PC时，与SOL的关联性会增强，而当研究纳入更多PC量度时，与SOL的关联性会减弱。在较高质量的研究中，效应量通常更大，女性可能作为PC和较长SOL之间的保护因子。因此，PC与睡眠之间存在一致的关联，这可以部分解释PC与不良健康之间的联系。