Table 4: Histological scores for arthritic and nonarthritic rats.

GroupKnee joint
Inflammation Erosion

Normal 00
Arthritis 44
Arthritis + indomethacin (5 mg/kg)32
Arthritis + NA-2 (5 mg/kg)20

The severity of arthritis was scored on a scale of 0–4. A score of 0 indicates absence of inflammation (I) or erosion (E) in the joints and tail samples, whereas a score of 2-3 demonstrates a mild to moderate inflammation and tissue erosion.