The impact of ambient temperature on frailty progression in older adults: Evidence from a longitudinal study in China.

Front Public Health · 2025 · PMC12170505 · PMID 40529676

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did not reach statistical significanceno p-value reported

While a quartile-based trend test did not reach statistical significance ( P -trend > 0.05), the restricted cubic spline (RCS) analysis uncovered a marked non-linear (J-shaped) relationship, with a turning point around 31.8 °C.

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