GAS5 and renal fibrosis: Spearman’s rank correlation analysis revealed a robust positive association between plasma GAS5 and renal fibrosis severity (r = 0.502, 95% CI 0.43–0.58, p < 0.001; Figure 5(A)), whereas urinary GAS5 exhibited a stronger inverse correlation (r = −0.646, 95% CI −0.71–−0.58, p < 0.001; Figure 5(B)).