Immune Mediators in Osteoarthritis: Infrapatellar Fat Pad-Infiltrating CD8+ T Cells Are Increased in Osteoarthritic Patients with Higher Clinical Radiographic Grading

Figure 2

Frequency of CD4⁺ and CD8⁺ T cells from peripheral blood, synovial tissue, and infrapatellar fat pad in patients with higher radiographic grading. Graphs showing frequencies of CD4⁺ and CD8⁺ T cells in peripheral blood (PBMC) (), synovial tissue (ST) (), and infrapatellar fat pad (FP) () from patients which were clinically graded based on the Ahlback classification system into grades I to IV. Number of dots corresponds to number of the patients. Error bar represents the mean and standard deviation (mean ± SD).