Morina · BMJ open 2021 · rapid narrative umbrella review · n=25 meta-analyses

Potential impact of physical distancing on physical and mental health: a rapid narrative umbrella review of meta-analyses on the link between social connection and health.

Level 3 - non-randomized controlled study

Rapid narrative umbrella review synthesising 25 meta-analyses of primarily observational studies.

PubMed 33737424 · doi:10.1136/bmjopen-2020-042335 · record verified 2026-08-26

What was done

Authors conducted a rapid narrative umbrella review searching Medline, PsycINFO, and Web of Science in April 2020. They included meta-analyses evaluating associations between indicators of social connection (social isolation, living alone, loneliness) and any physical or mental health outcome, using narrative synthesis to summarize the findings.

What was found

Twenty-five meta-analyses met inclusion criteria (10 focused on physical health, 15 on mental health). The abstract reports no numerical effect sizes or confidence intervals. Narratively, lack of social connection was associated with chronic physical symptoms, frailty, coronary heart disease, malnutrition, hospital readmission, reduced vaccine uptake, early mortality, depression, social anxiety, psychosis, cognitive impairment in later life, and suicidal ideation.

Why it matters

It aggregates evidence on the broad physical and psychological harms linked to social isolation and loneliness, which are critical trade-offs to consider during population-level physical distancing mandates.

Limits

The abstract reports no numerical metrics, pooled effect estimates, or confidence intervals. The findings derive from pre-pandemic observational literature on chronic isolation, which may not directly generalize to mandated short-term physical distancing. Study quality and heterogeneity across the included meta-analyses are not reported in the abstract.

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