Clinical Summary
Clinical Summary: Effects of a Digital Multidomain Cognitive Intervention in Older People at High Risk of Dementia: A Randomized Clinical Trial
Older adults at high risk of dementia need scalable, low-burden options beyond medications, especially in community settings where long-term face-to-face programs are hard to sustain. This trial tests whether a 6-month WeChat-based multidomain intervention can improve cognition and psychosocial outcomes in a distinctly high-risk older population.
Design
This was a 2-arm, parallel, randomized clinical trial
N
166 participants
Population
older adults at high risk of dementia
Duration
a 6-month intervention
Key Findings
- After 6 months, the intervention group showed greater improvement in general cognition on the MoCA than controls (t=2.106, P= .037, d=0.327).
- Visuospatial memory improved more with the intervention on ROCFT immediate recall (t=2.42, P=.017, d=0.376) and ROCFT long-delayed recall (t=2.797, P=.006, d=0.434).
- Loneliness decreased more in the intervention group on the UCLA Loneliness Scale (Z=−2.641, P=.008, r=0.237).
- In the non-amnestic MCI subgroup, the intervention improved MoCA (t=2.420, P= .017), AVLT long-delayed recall (t =2.120, P=.036), ROCFT immediate recall (t =3.138, P=.002), ROCFT long-delayed recall (t =3.912, P.05).
- Overall adherence was not significantly associated with outcomes (all P>.05), but higher module-specific participation was linked to better results: daily health lifestyle records with AVLT long-delayed recall (t =−2.277, P=.025, Cohen d=0.607) and cognitive rehabilitation with AVLT recognition recall (H =8.557, P=.014, η2 =0.104) and STT-A (H =14.48, P <.001, η2 =0.177).
Clinical Bottom Line
A 6-month WeChat-based multidomain intervention improved global cognition, visuospatial memory, and loneliness in older adults at high risk of dementia. The clearest signal was in cognitive and psychosocial maintenance rather than broad gains across every measured domain.
Practice Implications
- Consider digital multidomain programs for older adults with elevated dementia risk when in-person prevention programs are not feasible, especially if the goal is to support global cognition, visuospatial memory, and social connectedness over 6 months.
- Set expectations that benefits were selective: significant effects were seen for MoCA, ROCFT immediate recall, ROCFT long-delayed recall, and loneliness, while verbal memory, naming, fluency, attention, mobility, anxiety, depression, quality of life, and health-promoting behaviors did not show significant between-group differences.
- Pay attention to cognitive subtype when counseling patients: participants with non-amnestic MCI showed multiple significant gains, whereas no significant between-group differences were detected in the amnestic MCI subgroup.
- When implementing similar programs, monitor participation by module rather than relying only on a global adherence score, because module-specific engagement in daily health records and cognitive rehabilitation tracked with better memory and executive-function outcomes.
