Table 2

Site-by-site plain radiography analysis.

Erosion present, number

Erosion absent, number

OR (95%CI)

P

Erosion score, in eroded joints, mean (SD)

P

JSN present, number

JSN absent, number

OR (95%CI)

P

JSN score, in narrowed joints, mean (SD)

P

Spur

Present

73

3

64.9

<0.0001

4.2 (1.2)

<0.0001

55

14

28.7

<0.0001

2.6 (1.2)

<0.0001

Absent

197

525

(20.2-208.5)

2.2 (1.3)

58

431

(15.0-54.8)

1.8 (0.9)

Osteophyte

Present

139

28

19.0

<0.0001

3.2 (1.5)

<0.0001

75

58

13.2

<0.0001

2.2 (1.1)

0.65

Absent

131

500

(12.1-29.7)

2.3 (1.4)

38

387

(8.2-21.2)

2.3 (1.2)

Periosteal NBF

Present

50

1

119.8

<0.0001

3.9 (1.4)

<0.0001

29

7

21.6

<0.0001

2.5 (1.1)

0.08

Absent

220

527

(16.4-872.9)

2.5 (1.5)

84

438

(9.2-51.0)

2.1 (1.1)

Ankylosis

Present

7

0

30.1

0.0005

5.0 (0.0)

<0.0001

5

0

45.2

0.0003

4.0 (0.0)

<0.0001

Absent

263

528

(1.7-529.)

2.7 (1.5)

108

445

(2.5-823.6)

2.1 (1.1)

Sclerosis

Present

194

13

101.1

<0.0001

3.2 (1.5)

<0.0001

91

62

25.6

<0.0001

2.4 (1.1)

<0.0001

Absent

76

515

(54.9-186.3)

1.5 (0.7)

22

383

(14.9-43.7)

1.4 (0.7)

Relationship of new bone formation (NBF) with erosion and joint space narrowing (JSN) (n = 798 joints for erosion and 558 joints for JSN). CI, confidence interval; OR, odds ratio; SD, standard deviation.

Dalbeth et al. Arthritis Research & Therapy 2012 14:R165   doi:10.1186/ar3913