Concurrence of Rheumatoid Arthritis and Ankylosing Spondylitis: Analysis of Seven Cases and Literature Review

Table 2

Clinical and epidemiological characteristics of 81 patients with concurrent RA and AE.

	n = 81
Sex
Male	58 (71.60%)
Mean age (years)	53.72 ± 14.83
Onset mean age (years)	34.89 ± 14.47
First disease diagnosed
Rheumatoid arthritis	39/75 (52%)
Ankylosing spondylitis	36/75 (40%)
Mean duration of disease (years)	18.08 ± 13.16
First symptom
Lumbar pain	37/76 (48.68%)
Arthritis	35/76 (46.05%)
Uveitis	2/76 (2.81%)
Rheumatoid nodules	38/73 (52.05%)
Inflammatory lumbar pain	64/77 (83.12%)
Uveitis	11/81 (13.58%)
Extra-articular involvement (except uveitis)	15/81 (18.51%)
Felty syndrome	4/16
Reactive arthritis	3/16
Sjögren’s syndrome	2/16
Vasculitis	2/16
Membranous nephropathy	2/16
Dermatomyositis	1/16
Interstitial lung disease	1/16

Mean ± standard deviation.