marginal significanceP =0.063
Chronic pain was negatively associated with IC scores, achieving statistical significance in the Medium-stable Group ( Coe =-0.032, P <0.001) and marginal significance in the Low-decreased Group ( Coe =-0.022 P =0.063), though no significant association was found in the High-increased Group ( Coe =-0.003, P =0.774).