PTH and chronic kidney disease: β2-M was associated with thinner GC-IPLt (β: –0.294; 95% CI: –0.469∼–0.118), where PTH was associated with higher GCC-FLV (β: 0.004; 95% CI: 0.002∼0.006) and GCC-GLV (β: 0.007; 95% CI: 0.004∼0.01) among CKD patients.