a clear trendp < 0.001
Quartile analyses in this age group show significant increases in β values across higher quartiles of ACAG, particularly notable in Q3 ( β = 11.55, 95% CI: 5.37, 17.73; p < 0.001) and Q4 (β = 12.75, 95% CI: 6.67, 18.83; p < 0.001), with a clear trend ( p < 0.001).