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Table 2 Characteristics of rheumatoid arthritis patients with coexisting ankylosing spondylitis

From: Frequency of inflammatory back pain and sacroiliitis in Egyptian patients with rheumatoid arthritis

Case

Age (years)

Sex

First symptom

Age O (years)

Back pain

Gluteal pain

Enth.

Sacroiliitis

RN/ErosA

RF

HLA-B27

Axial SpA

Clin.

X-ray

1

40

F

PolyA

33

IBP

+

+

+

G1

−/+

−

+

+

2

29

F

PolyA

26

IBP

+

+

−

G2

−/+

−

−

+

3

23

F

PolyA

21

IBP

+

+

+

G2

−/−

+

+

+

4

45

F

PolyA

35

IBP

+

+

−

G2/3

+/+

−

−

−

5

50

F

PolyA

43

IBP

+

+

+

G2/3

−/+

−

−

−

6

37

F

PolyA

34

IBP

−

+

+

G2

−/+

+

−

+

7

32

F

PolyA

29

IBP

+

+

+

G2

−/+

+

+

+

8

44

F

PolyA

43

IBP

+

+

+

G2

−/−

−

−

+

9

44

F

PolyA

42

IBP

+

+

+

G2

−/−

−

−

+

10

41

F

PolyA

21

IBP

+

+

+

G3

−/+

−

+

+

11

50

F

PolyA

36

IBP

+

+

−

G2

−/+

+

−

−

12

45

F

PolyA

42

Non-I

+

+

+

G2

−/+

+

−

+

13

20

F

PolyA

18

IBP

+

+

+

G2

−/+

+

−

+

14

35

F

PolyA

34

IBP

−

+

+

G2

+/+

+

+

+

15

42

F

PolyA

39

IBP

+

+

−

G2

−/−

−

−

+

16

27

F

PolyA

26

IBP

+

+

−

G3*

−/+

+

+

−

17

32

F

PolyA

20

IBP

−

-

−

G2

−/+

+

−

+

18

27

F

LBP

26

IBP

+

+

+

G2

−/−

−

−

+

19

31

F

PolyA

21

Non-I

−

+

−

G1/4

+/+

−

+

+

20

25

F

PolyA

23

IBP

+

+

−

G2/3

−/−

−

−

+

  1. F female, PolyA polyarthritis, AgeO age at onset, LBP low back pain, IBP inflammatory back pain, non-I non-inflammatory, Enth enthesitis, Clin clinical, G grade, RN rheumatoid nodule, ErosA erosive arthritis, RF rheumatoid factor, HLA-B27 human leucocyte antigen–B27, SpA spondyloarthritis
  2. *All had bilateral sacroiliitis except one patient was unilateral