Table 1 Phenotypic heterogeneity in a cohort of 282 cases of psoriatic arthritis

Age

55 ± 12

Male gender

134 (47)

Family history of psoriasis (n = 280)

175 (63)

Family history of PsA (n = 280)

45 (16)

Age of onset of psoriasis

28 ± 14

Psoriasis duration (years)

27 ± 14

Age of onset of PsA

35 ± 13

PsA duration (years)

19 ± 9

Years between psoriasis and PsA

6 (0 to 14)

Psoriasis before PsA

184 (65)

PsA before psoriasis

45 (16)

Psoriasis and PsA at same time

52 (18)

Nail disease

244 (79)

 Pitting

96 (34)

 Onycholysis

155 (55)

Peripheral arthritis

280 (99)

 Polyarthritis

258 (91)

 Oligoarthritis

21 (8)

Deformed joint count, if deformity

6 (4 to 12)

Enthesitis^a

97 (34)

Dactylitis^a

150 (53)

Sacroiliitis^a

71 (25)

 Asymmetric^a

51 (18)

 Symmetric^a

18 (6)

Joint deformity^a

183 (65)

Joint fusion^a

83 (29)

Erosions^a (n = 281)

123 (44)

Osteolysis^a (n = 281)

41 (15)

Current PASI

1.2 (0.3 to 2.8)

Max PASI

3.8 (1.8 to 9.2)

Plaque psoriasis only

224 (79)

Psoriasis, nonplaque

59 (21)

Uveitis

9 (3)

Total on TNFi

176 (62)

 Psoriasis requiring TNFi

32 (11)

 PsA requiring TNFi

171 (60)

Number of TNFi, if on TNFi

1 (1 to 2; range 1 to 4)

Number of DMARDs

1 (1 to 2; range 0 to 5)