Summary: Across most community settings, mindfulness training reduces stress, anxiety and depression and increases wellbeing compared with no intervention. However, in some trials mindfulness performs no better than other active practices for anxiety and depression.
Source: University of Cambridge
Mindfulness courses delivered in community settings can improve mental health for many people, but their benefits are not uniform and may be matched by other wellbeing practices, according to a large systematic review and meta-analysis from researchers at the University of Cambridge.
Mindfulness is commonly described as the deliberate, nonjudgmental awareness of the present moment. In recent years it has been widely adopted as a practical approach to reduce stress and enhance wellbeing. While health services in some countries incorporate mindfulness-based therapies for clinical conditions such as depression, many people learn mindfulness in community contexts—workplaces, universities, local courses and other nonclinical settings—where programmes are often promoted as a broadly accessible way to support mental health.
To clarify the evidence, researchers from Cambridge’s Department of Psychiatry pooled data from randomised controlled trials (RCTs) that evaluated in-person mindfulness-based programmes (MBPs) delivered in nonclinical environments. Their synthesis aimed to resolve mixed or underpowered findings from individual trials by combining results across many studies.
The review identified 136 RCTs involving 11,605 adult participants from 29 countries (ages 18–73), with 77% of participants being women. The trials tested expert-defined mindfulness programmes and measured validated outcomes for anxiety, depression, psychological distress and mental wellbeing at one to six months after program completion.
Overall, compared with no intervention, MBPs typically produced modest to moderate improvements in anxiety, depression and distress, and a smaller positive effect on wellbeing. However, prediction intervals reported in the review indicate substantial variability across settings: in some trials MBPs did not improve anxiety or depression. When MBPs were compared with nonspecific active controls such as attention-placebo activities, there was evidence of benefit for depression in several trials, but there was no reliable evidence that MBPs outperformed specific active alternatives. When analyses were restricted to higher-quality trials, MBPs retained a clear effect on stress-related distress but showed weaker or inconclusive effects on anxiety, depression and wellbeing.
Dr Julieta Galante, first author of the report, emphasized that mindfulness can help many people but is not universally effective: “For the average person and setting, practising mindfulness appears better than doing nothing for reducing depression, anxiety and distress. But we shouldn’t assume it works for everyone or in every context.” She urged that community mindfulness courses be offered as one option among several, and that their effects be monitored as programmes are rolled out to new groups.
The research team noted several factors likely to explain the uneven results: differences in course design, instructor training, target populations and delivery settings can all influence outcomes. Programmes aimed at higher-risk groups—such as healthcare workers or people under substantial stress—tended to show larger benefits than universal, open-access courses.
The review also highlights methodological limitations in the evidence base. Many trials were rated at high risk of bias, for example because of participant dropout that was not fully reported. The authors caution that these quality issues weaken confidence in the pooled estimates: the strongest, most consistent finding across higher-quality trials was an effect on psychological distress, while evidence for other outcomes was more uncertain.
Compared with alternative “feel-good” practices such as exercise, mindfulness did not consistently outperform other approaches. Professor Peter Jones, senior author, observed: “Mindfulness is often better than doing nothing, but there are other effective ways to support mental health and wellbeing. Depending on what is most acceptable, feasible or cost-effective, alternatives like physical activity may be equally or more suitable for some groups.”
The number of online mindfulness programmes has grown rapidly, a trend accelerated by the COVID-19 pandemic. Although this review focused on in-person trials and did not evaluate online delivery, other studies suggest digital courses can be effective despite typically offering less direct teacher and peer interaction. The authors recommend further research on online formats to assess their consistency, safety and which settings benefit most.
Funding: The study was supported by the National Institute for Health Research (NIHR) Applied Research Collaboration East of England and NIHR Cambridge Biomedical Research Centre, with additional backing from Cambridgeshire & Peterborough NHS Foundation Trust, the Medical Research Council, Wellcome and the Spanish Ministry of Education, Culture and Sport.
About this psychology research news
Source: University of Cambridge
Contact: Craig Brierley – University of Cambridge
Image: The image is in the public domain
Original Research: Open access.
“Mindfulness-based programmes for mental health promotion in adults in nonclinical settings: A systematic review and meta-analysis of randomised controlled trials” by Julieta Galante et al., published in PLOS Medicine.
Abstract
Mindfulness-based programmes for mental health promotion in adults in nonclinical settings: A systematic review and meta-analysis of randomised controlled trials
Background
Large-scale mental health promotion is urgently needed outside clinical services. Mindfulness-based programmes (MBPs) are widely used to reduce stress, but a comprehensive synthesis of randomized trial evidence in community settings has been lacking. This review evaluated whether in-person MBPs improve anxiety, depression, psychological distress and mental wellbeing compared with no intervention or comparator interventions in nonclinical adult populations.
Methods and findings
Following a preregistered protocol (PROSPERO CRD42018105213), researchers searched 13 databases through August 2020 for randomized controlled trials of in-person, expert-defined MBPs in nonclinical settings. Two reviewers independently selected studies, extracted data and assessed trial quality using the Cochrane Risk-of-Bias Tool 2.0. Primary outcomes were validated measures of anxiety, depression, psychological distress and wellbeing at one to six months post-programme. Statistical significance was adjusted for multiple testing; prespecified secondary analyses included meta-regression and sensitivity checks. Pairwise random-effects multivariate meta-analyses and prediction intervals were calculated.
The review included 136 trials with 11,605 participants across 29 countries (77% women, ages 18–73). Compared with no intervention, MBPs on average reduced anxiety, depression and distress and modestly increased wellbeing, although prediction intervals showed substantial between-study variability and some trials found no effect. Versus nonspecific active controls, MBPs showed benefit for depression in some analyses but not reliably for anxiety or distress; versus specific active controls there was no clear evidence of superiority. When only higher-quality trials were considered, effects persisted for distress but were weaker or inconsistent for other outcomes. Trials conducted in the USA reported smaller effects, and MBPs targeted at higher-risk groups produced larger benefits than universal programmes. Overall confidence in the evidence ranged from moderate to very low by GRADE, largely because of inconsistency and risk of bias.
Conclusions
Compared with taking no action, MBPs in nonclinical settings can promote aspects of mental health, especially reducing psychological distress. However, heterogeneity across studies means these findings should not be generalized to all settings or populations. MBPs may yield specific benefits for common mental health symptoms, but other preventative interventions can be equally effective. Careful implementation of MBPs alongside ongoing evaluation is recommended to identify which programmes and which settings are most likely to benefit.