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Table 1 Diagnoses of all patients within first 6 months and baseline and final diagnoses of patients participating the 14-year follow-up

From: Do infections play a role in the development of chronic inflammatory arthritis? A 14–year follow-up study of patients with early arthritis

 

All patients

Patients participating the 14-year follow-up

 

Established diagnosis within 6 months,

n (%)

Established diagnosis within 6 months,

n (%)

14 years,

n (%)

Total number of patients

104

80

80

Rheumatoid arthritis

16 (15)

15 (19)

12 (15)

Undifferentiated arthritis

20 (19)

16 (20)

8 (10)

Reactive arthritis

41 (39)

31 (39)

24 (30)

Sarcoid arthropathy

3 (3)

3 (4)

1 (1)

Polymyalgia rheumatica

2 (2)

0 (0)

0 (0)

Connective tissue disease

5 (5)

3 (4)

7 (9)

Arthralgia

6 (6)

5 (6)

3 (4)

Septic arthritis

1 (1)

1 (1)

1 (1)

Ankylosing spondylitis

0 (0)

0 (0)

4 (5)

Peripheral spondyloarthritis

0 (0)

0 (0)

2 (3)

Rheumatic fever

3 (3)

2 (3)

1 (1)

Miscellaneous

7 (7)*

4 (5)**

17 (21)***

  1. *Dermatomyositis 1, autoimmune haemolytic anaemia and nephrotic syndrome 1, rubella arthritis 1, postinfectious arthralgia 1, fever of unknown origin 1, urticaria1, enteroarthritis associated with Crohn’s disease 1
  2. ** Arthrosis 2, enteroarthritis with Crohn’s disease 1, rubella arthritis 1
  3. *** Osteoarthritis 6, fibromyalgia 3, enteroarthritis with Crohn’s disease 2, borreliosis 2, anti-phospholipid syndrome 2, rubella arthritis 1, fibrosing alveolitis 1