Table 2

Demographic and clinical features of patients with oligoarticular and polyarticular PsA.

Parameter

Oligoarticular PsA

Polyarticular PsA

Number of patients

28

17

Sex (male/female)

20/8

9/8

Age (years)

42.6 ± 10.9

43.7 ± 10.7

Disease duration (years)

7.4 ± 8.4

11.9 ± 11.1

Number of swollen joints

1.7 ± 1.0

9.2 ± 4.2

Serum CRP (mg/dl)

2.3 ± 3.6

3.4 ± 2.2

ESR (mm/hour)

19.2 ± 18.2

40.8 ± 21.1

Rheumatoid factor (positive/negative)

0/28

0/17

Sacroiliitis (≥grade II; +/-)

2/15

4/12

Enthesitis (+/-)

6/14

10/6

Hand joint involvement (+/-)

9/12

14/3

Symmetrical joint involvement (+/-)

4/19

10/7

DIP joint involvement (+/-)

8/11

10/7

NSAID (+/-)

21/6

15/1

DMARD (+/-)

8/19

10/6

Corticosteroids (treated/untreated)

2/25

3/13

Demographic and clinical features of patients with oligoarticular and polyarticular PsA. Values are expressed as mean ± standard deviation or as numbers. CRP, C-reactive protein; DIP, distal interphalangeal joint; DMARD, disease-modifying antirheumatic drugs; ESR, erythrocyte sedimentation rate; NSAID, nonsteroidal anti-inflammatory drug.

Kruithof et al. Arthritis Research & Therapy 2005 7:R569   doi:10.1186/ar1698