Abstract：
OBJECTIVE: This study aimed to investigate whether attentional control serves as a mediator for mindfulness-based interventions for emotional distress, utilizing a randomized waitlist (WL)-controlled design.
METHODS: A total of 498 participants with high emotional distress was recruited online and randomly assigned to a 49-day online Mindfulness Intervention for Emotional Distress (MIED) group (N = 249) or a WL control group (N = 249). Levels of attentional control, anxiety and depression were assessed at baseline (T0), Week 3 (T3), Week 5 (T5) and Week 7 (postintervention, T7).
RESULTS: Linear mixed models revealed significant Group-by-Time interaction effects for attentional control (p < 0.001), anxiety (p < 0.001) and depression (p < 0.05). Latent growth curve analyses demonstrated a significant increase in attentional control and a decrease in anxiety and depression levels during the MIED programme. These changes becoming evident starting Week 3. Longitudinal mediation analyses revealed that the slope of attentional control significantly mediated the effects of the MIED programme on the slope of anxiety and depression levels. Further, attentional control level at Week 3 significantly mediates the effect of MIED programme on anxiety and depression levels at Weeks 5 and 7. Similarly, attentional control level at Week 5 significantly mediates the MIED programme\'s effects on anxiety and depression levels at Week 7.
CONCLUSIONS: The present trial provides evidence suggesting that mindfulness interventions may alleviate emotional distress through the enhancement of attentional control.
BACKGROUND: Chinese Clinical Trial Registry number: ChiCTR2200064140.
METHODS: A total of 498 participants with high emotional distress was recruited online and randomly assigned to a 49-day online Mindfulness Intervention for Emotional Distress (MIED) group (N = 249) or a WL control group (N = 249). Levels of attentional control, anxiety and depression were assessed at baseline (T0), Week 3 (T3), Week 5 (T5) and Week 7 (postintervention, T7).
RESULTS: Linear mixed models revealed significant Group-by-Time interaction effects for attentional control (p < 0.001), anxiety (p < 0.001) and depression (p < 0.05). Latent growth curve analyses demonstrated a significant increase in attentional control and a decrease in anxiety and depression levels during the MIED programme. These changes becoming evident starting Week 3. Longitudinal mediation analyses revealed that the slope of attentional control significantly mediated the effects of the MIED programme on the slope of anxiety and depression levels. Further, attentional control level at Week 3 significantly mediates the effect of MIED programme on anxiety and depression levels at Weeks 5 and 7. Similarly, attentional control level at Week 5 significantly mediates the MIED programme\'s effects on anxiety and depression levels at Week 7.
CONCLUSIONS: The present trial provides evidence suggesting that mindfulness interventions may alleviate emotional distress through the enhancement of attentional control.
BACKGROUND: Chinese Clinical Trial Registry number: ChiCTR2200064140.
摘要：
目的：本研究旨在调查注意控制是否作为基于正念的情绪困扰干预的中介，利用随机候补名单(WL)控制设计。
方法：在网上招募了498名高度情绪困扰的参与者，并随机分配到49天的在线正念情绪困扰干预（MIED）组（N=249）或WL对照组（N=249）。注意力控制水平，在基线（T0）评估焦虑和抑郁，第3周（T3），第5周(T5)和第7周(干预后，T7).
结果：线性混合模型显示了注意力控制的显着分组交互效应（p<0.001），焦虑(p<0.001)和抑郁(p<0.05)。潜在增长曲线分析表明，在MIED计划期间，注意力控制显着增加，焦虑和抑郁水平降低。从第3周开始，这些变化变得明显。纵向调解分析显示，注意控制的斜率显着介导了MIED计划对焦虑和抑郁水平斜率的影响。Further,第3周的注意力控制水平显著介导了MIED计划对第5周和第7周的焦虑和抑郁水平的影响.同样，第5周的注意力控制水平显著介导MIED计划对第7周焦虑和抑郁水平的影响。
结论：本试验提供的证据表明，正念干预可以通过加强注意控制来缓解情绪困扰。
背景：中国临床试验登记号：ChiCTR2200064140。
方法：在网上招募了498名高度情绪困扰的参与者，并随机分配到49天的在线正念情绪困扰干预（MIED）组（N=249）或WL对照组（N=249）。注意力控制水平，在基线（T0）评估焦虑和抑郁，第3周（T3），第5周(T5)和第7周(干预后，T7).
结果：线性混合模型显示了注意力控制的显着分组交互效应（p<0.001），焦虑(p<0.001)和抑郁(p<0.05)。潜在增长曲线分析表明，在MIED计划期间，注意力控制显着增加，焦虑和抑郁水平降低。从第3周开始，这些变化变得明显。纵向调解分析显示，注意控制的斜率显着介导了MIED计划对焦虑和抑郁水平斜率的影响。Further,第3周的注意力控制水平显著介导了MIED计划对第5周和第7周的焦虑和抑郁水平的影响.同样，第5周的注意力控制水平显著介导MIED计划对第7周焦虑和抑郁水平的影响。
结论：本试验提供的证据表明，正念干预可以通过加强注意控制来缓解情绪困扰。
背景：中国临床试验登记号：ChiCTR2200064140。
