Online mindfulness course may improve cognitive impairment in cancer survivors
A randomized controlled trial of 170 cancer patients with cognitive impairment found that an 8-week online mindfulness-based stress reduction (MBSR) course led to significant improvements in subjective cognitive function, quality of life, and fatigue compared to a waitlist control, with gains sustained at 3-month follow-up.
Cancer survivors often experience cognitive impairment from treatment, the disease itself, or illness-related stress, substantially affecting daily function and well-being. Researchers studied 170 cancer patients who had completed antitumor therapy (between 3 months and 5 years prior) and reported cognitive difficulties.
Participants were randomly assigned either to an 8-week online MBSR course led by an experienced therapist or to a waitlist control group. The primary measure was subjective cognitive function (FACT-Cog), assessed at baseline, 8 weeks (post-intervention), and 3 months; secondary measures included quality of life (FACT-G), fatigue (BFI), depressive symptoms (PHQ-9), and objective attention and memory tests. Compared to controls, the MBSR group showed significant improvement in subjective cognitive function (Cohen's d = 0.36–0.72 across subscales, p < 0.004), quality of life (d = 0.32, p = 0.001), fatigue (d = −0.47, p < 0.001), depressive symptoms (d = −0.57, p < 0.001), and objective verbal memory performance (d = 0.25, p = 0.030). All improvements persisted at the 3-month follow-up assessment. One limitation is reliance on self-reported cognitive function as the primary outcome; objective cognitive testing showed smaller effect sizes, suggesting subjective benefit may exceed measurable improvement on formal cognitive tasks.
The study design allowed the waitlist control group to receive the intervention after 8 weeks, providing internal validation: the control-to-intervention group showed similar improvements once they completed the course, strengthening confidence in the intervention's effect. Notably, depressive symptoms and fatigue showed larger effect sizes (d = −0.57 and −0.47) than subjective cognitive complaints, suggesting mindfulness may work partly through reducing mood and energy disturbance rather than directly restoring attention or memory capacity. Objective cognitive testing (Go-No-Go for attention, VLMT for verbal learning and memory) yielded smaller and mixed improvements; memory showed a d of 0.25, while attention effects were not separately reported as significant, indicating that participants *felt* cognitively sharper but gains on formal cognitive tasks were more limited. The online format and therapist-led delivery (rather than self-guided) may have supported adherence and engagement. Three-month persistence of effects suggests the benefits were not transient, though longer follow-up (6–12 months) was not reported.
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- Improving Cognitive Impairment in Cancer Patients With an Online Course in Mindfulness-Based Stress Reduction-A Randomized Controlled Trial. — Psycho-oncology (Read the original)