Trends in Planetary Health Diet Index for the United States (PHDI-US) Scores and Associations With Mortality Risk in the United States Between 1999 and 2020.

Food Sci Nutr · 2026 · PMC13259960 · PMID 42294075

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did not reach statistical significanceno p-value reported

However, quartile‐based analysis revealed protective trends, with the highest quartile (Q4) showing a 23% reduction in mortality risk compared to the lowest quartile (HR = 0.773, 95% CI: 0.609–0.981, p = 0.034), though the overall trend did not reach statistical significance ( p ‐trend = 0.084).

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an overall trendno p-value reported

Quartile‐based analyses suggested lower all‐cause mortality in higher PHDI‐US categories after covariate adjustment, with evidence of an overall trend across quartiles in adjusted models (Table 4 ).

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