The study focused on four groups based on logarithm-transformed C-reactive protein-to-albumin ratio (LnCAR), with RA present in 239 individuals (2.69%) in Q1, 3,729 individuals (4.10%) in Q2, 488 individuals (5.78%) in Q3, and 645 individuals (7.78%) in Q4. Here, ALB is linked to rheumatoid arthritis.