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. 2025 Apr 22;9:47. doi: 10.1186/s41927-025-00499-7

Table 3.

Multiplicative interaction analysis

Variables Age<60 Age>60 p for interaction Multiplicative scale
HR 95% CI p value HR 95% CI p value
N(events) 454(73) 647(368)
Log-CALLY 0.28(0.16,0.48) <0.001 0.70(0.55,0.88) 0.003 0.002
Subgroups
 Log-CALLY<1.107 1(Reference) 1(Reference)
 Log-CALLY>1.107 0.34(0.2,0.59) <0.001 0.73(0.57,0.94) 0.015 0.009 1.99(1.18,3.37),p=0.01
Variables Man Female p for interaction Multiplicative scale
HR 95% CI p value HR 95% CI p value
N(events) 635(233) 466(208)
Log-CALLY 0.54(0.4,0.73) <0.001 0.75(0.56,1.02) 0.067 0.038
Subgroups
 Log-CALLY<1.107 1(Reference) 1(Reference) 0.033
 Log-CALLY>1.107 0.56(0.4,0.73) <0.001 0.82(0.6,1.12) 0.215 1.57(1.04,2.37),p=0.03

The interaction effects between the CALLY index, gender, and age were analyzed. A p-value of < 0.05 is considered statistically significant