SynthesisPloS one2026
Dietary and lifestyle quality and endometrial cancer: Incidence and survivorship outcomes-An umbrella review of systematic reviews and meta-analyses.
Synthesis in PloS one, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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6 authors.
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Abstract
Composite dietary and lifestyle indices capture the combined effects of multiple health-related behaviours and may better reflect real-world cancer risk and survivorship than single exposures. This umbrella review aimed to evaluate and grade the strength of evidence for associations between adherence to composite dietary and lifestyle quality indices and endometrial cancer (EC) outcomes, including risk, EC-specific survival, overall survival, disease recurrence, quality of life, and new-onset cardiometabolic diseases. PubMed, Embase, Scopus, Web of Science, CINAHL, and Cochrane Library databases were systematically searched for relevant systematic reviews. Evidence was graded using prespecified umbrella review criteria. A total of 21 systematic reviews were included. Nine investigated diet quality (7 meta-analyses) and 12 investigated lifestyle exposure or interventions (8 meta-analyses). The outcomes assessed were EC risk (N = 14), all-cause or cancer-specific mortality (N = 5), recurrence (N = 4), overall or cancer-specific survival (N = 3), QoL (N = 5), and cardiometabolic events (N = 1). Following a Mediterranean diet was associated with 29% lower odds of EC (pooled OR = 0.71, 95% CI 0.51-0.98; class IV), whereas Western dietary patterns were associated with 20% higher odds of EC (pooled OR = 1.20, 95% CI 1.03-1.39; class IV). A combined healthy diet and lifestyle approach was associated with a 46% lower hazard of EC incidence (pooled HR = 0.54, 95% CI 0.42-0.71; class III), although heterogeneity was high. No significant associations were observed between lifestyle interventions and global or domain-specific quality of life (QoL) across follow-up durations ranging from 9 weeks to 12 months, irrespective of the validated assessment instruments used. Evidence remains limited regarding the associations between diet and lifestyle factors and EC recurrence, survival, mortality, and cardiometabolic outcomes. Our umbrella review identified suggestive (class III-IV) evidence for associations between healthy dietary patterns, particularly the Mediterranean diet, and combined healthy lifestyle approaches with lower EC incidence. Evidence remains insufficient or non-significant for post-diagnosis outcomes, underscoring the need for further high-quality research.
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