We followed the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-analyses) guidelines to conduct and report the current systematic review and meta-analysis (the PRISMA 2020 Checklist in the supplementary Table S3 ).
In Study 1, trait mindfulness was established as the independent variable, with rumination and negative attentional bias serving as mediating variables and sleep quality as the dependent variable, thereby constructing a chain mediation model. This …