ArticleBJC reports2025
Blood Clock Correlation Distance (BloodCCD) as a novel marker to detect circadian rhythm disruption in cancer survivors with insomnia.
Article in BJC reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02613364 (A Randomized Clinical Trial Comparing the Effectiveness of Yoga, Survivorship Health Education, and Cognitive Behavioral Therapy for Treating Insomnia in Cancer Survivors), which is not on this map. Cited by 1 paper.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
A Randomized Clinical Trial Comparing the Effectiveness of Yoga, Survivorship Health Education, and Cognitive Behavioral Therapy for Treating Insomnia in Cancer Survivors
Who cites it
1 citing paper in PubMed.
- The co-occurrence of obesity with cancer-related fatigue and their impact on physical function among breast cancer survivors.Cancer survivorship research & care · 2026Article
Corrections and comments
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Authors and funding
20 authors.
Funding
Abstract
backgroundInsomnia is a toxicity of cancer and treatment for survivors without an objective biochemical measure. Circadian rhythms are 24-h cycles that influence physiologic processes including sleep, and disrupted rhythms may contribute to insomnia. Here, we use BloodCCD to assess circadian rhythms from RNA-sequencing of blood from cancer survivors with insomnia from the YOCAS-II trial. YOCAS-II aimed to determine whether YOCAS©® yoga or cognitive behavioral therapy for insomnia (CBT-I) improved insomnia in survivors compared with a behavioral placebo. We hypothesized that circadian rhythms are disrupted in survivors, and that insomnia severity correlates with the degree of circadian disruption.
methodsBloodCCD was developed to biochemically assess circadian rhythms in blood. It was adapted from the previously published Clock Correlation Distance (CCD) and uses a correlation matrix of 42 genes known to oscillate throughout the day in blood.
resultsCancer survivors had higher (worse) BloodCCD scores, indicating disrupted circadian clock, compared to healthy individuals. Furthermore, insomnia severity correlated with worse BloodCCD, and those in the YOCAS and behavioral placebo arm showed significant correlation between BloodCCD score and insomnia.
conclusionsBloodCCD shows promise as a biomarker to biochemically detect disrupted circadian rhythms in cancer survivors, and as an indicator for insomnia severity. CLINICAL TRIAL IDENTIFIER: NCT02613364.
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Registered trials
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