Table 5. .

Frequencies, percentages and results of Fisher’s exact test for the association between disease activity in rheumatoid patients with and without signs of osteoarthritic changes

Osteoarthritic changes	Positive OA	Negative OA	P-value
	n (%) Disease activity	n (%) Disease activity
Erosion in condylar head			0.170
Low activity	0 (0)	4 (16.7)
Moderate activity	4 (25)	8 (33.3)
High activity	12 (75)	12 (50)
Erosion in fossa			0.532
Low activity	0 (0)	4 (14.3)
Moderate activity	4 (33.3)	8 (28.6)
High activity	8 (66.7)	16 (57.1)
Flattening in condylar head			0.001a
Low activity	0 (0)	4 (50)
Moderate activity	10 (31.2)	2 (25)
High activity	22 (68.8)	2 (25)
Flattening in fossa			0.001a
Low activity	0 (0)	4 (50)
Moderate activity	10 (31.2)	2 (25)
High activity	22 (68.8)	2 (25)
Osteophytes			0.012a
Low activity	0 (0)	4 (28.6)
Moderate activity	10 (38.5)	2 (14.3)
High activity	16 (61.5)	8 (57.1)
Subchondral cyst			0.012a
Low activity	0 (0)	4 (28.6)
Moderate activity	10 (38.5)	2 (14.3)
High activity	16 (61.5)	8 (57.1)

OA, osteoarthritis.

^aSignificant at p ≤ 0.05.