Trial reportBMJ open2026
Petit volunteer protocol for loneliness alleviation in community-dwelling older adults in Japan: a randomised controlled trial.
Trial report in BMJ open, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
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.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionOlder adult loneliness is associated with depression, disability and higher mortality rates. As a public health concern, it contributes to increased medical and nursing care costs. Several intervention studies have been conducted to reduce loneliness; however, no universally effective method has been established. We hypothesise that if older adults use their physical abilities to perform petit volunteering, their feelings of loneliness would likely be reduced. This trial aims to investigate the benefits of using petit volunteers for loneliness alleviation (PetitVOLA) application as a sustainable programme to prevent loneliness through the creation of an Ikigai-based volunteer system. METHODS AND ANALYSIS: We intend to conduct a randomised controlled trial with a 3-month intervention period to verify the effectiveness of the PetitVOLA programme (sample size, 126 participants; power, 0.8; significance level, 0.05). The primary outcome is loneliness, which we will measure using the UCLA Loneliness Scale (V.3). Secondary outcomes include social isolation (assessed via multicomponent objective criteria), life satisfaction, physical function (gait speed and grip strength), cognitive function, psychological status and lifestyle, each assessed with validated instruments (eg, Mini-Mental State Examination, Geriatric Depression Scale-15 and the Active Mobility Index). The main analysis uses an intention-to-treat approach, while a full analysis set and a per-protocol set are included for sub-analyses. ETHICS AND DISSEMINATION: The trial was approved by the Human Research Ethics Committee of the National Center for Geriatrics and Gerontology, Japan (approval No. 1794). The results of this trial will be disseminated through peer-reviewed journals, conference presentations and reports to the participating community. TRIAL REGISTRATION NUMBER: UMIN000056649.
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