highly significantp < 0.0001
The log-rank test revealed highly significant differences in survival across quartiles for both outcomes (p < 0.0001).
The log-rank test revealed highly significant differences in survival across quartiles for both outcomes (p < 0.0001).
Compared with the lowest quartile, individuals in the highest RCII quartile had a 49.4% higher risk of all-cause mortality (HR = 1.494, 95% CI 1.250–1.786), whereas the association with CVD mortality did not reach statistical significance (HR = 1.358, 95% CI 0.948–1.943).