a clear trendP < 0.001
The comparison of demographic characteristics between the T2DM and T2DM+C groups The results showed a clear trend toward younger patients in the T2DM+C cohort, with 22.9% of patients aged ≤50 years, significantly higher than the 6.6% in the pure T2DM cohort ( χ 2=217.61, P < 0.001).