CD4 and urolithiasis: For the Treg cell panel, two traits were linked with increased urolithiasis risk: CD4 Treg %T cell (IVW: OR = 1.060; 95% CI: 1.015, 1.108; p = 0.009) and activated and resting Treg AC (IVW: OR = 1.058; 95% CI: 1.018, 1.100; p = 0.004).