Cross-lagged relationship between sleep quality and sense of coherence and the moderating role of mastery in older adults.

The aims of this study were to explore the predictive relationship between sleep quality and sense of coherence (SOC) and to examine a possible moderating role of mastery in this relationship. A three-wave longitudinal design was employed using a sample of 304 older adults aged 55-87 years old. Cross-lagged panel analyses and moderating effect analyses showed that sleep quality can predict the levels of SOC 6 months later, whereas SOC cannot predict sleep quality 6 months later. In addition, mastery can moderate the effect of sleep quality on SOC. Specifically, the lagged effects of sleep quality on SOC in older adults who had low levels of mastery were stronger than in those who had high levels of mastery. Overall, these findings provide valuable insights for understanding the predictive relationship between sleep quality and SOC and emphasise the moderating role of mastery. Also, our results offer important implications for enhancing the SOC in older adults by improving sleep quality and mastery.