Presenting features of elderly onset (EOPsA) and younger onset (YOPsA) psoriatic arthritis
| Presenting features | EOPsA (n=16) | YOPsA (n=50) | p |
|---|---|---|---|
| Age at onset (y) | 65.1 (6.7) | 44.2 (11.1) | — |
| M/F | 8/8 | 23/27 | NS |
| Active joints no (mean (SD)) | 12.2 (6.3) | 6.7 (6.6) | <0.001 |
| Dactylitis no (%) | 6 (37.5) | 15 (30) | NS |
| Pitting oedema no (%) | 3 (18.7) | 4 (8) | NS |
| HLA-B27 no (%) | 4 (25) | 12 (24) | NS |
| Radiograph bone erosions hands no (mean (SD)) | 2.3 (2.1) | 2.2 (2.2) | NS |
| Radiograph bone erosions feet no (mean (SD)) | 2.7 (1.2) | 1.1 (1.1) | <0.001 |
| Scintigraphic active sacroiliac joints no (%) | 4 (25) | 15 (30) | NS |
| Scintigraphic active sternoclavear joints no (%) | 4 (25) | 17 (34) | NS |
| Erythrocyte sedimentation rate (mm 1st h) (mean (SD)) | 64.2 (35.3) | 30.5 (30.0) | <0.001 |
| C reactive protein (mg/dl) (mean (SD)) | 3.9 (2.0) | 1.33 (1.3) | <0.001 |
For significance at 0.05 level, with 12 comparisons, Bonferroni adjustment requires a p value of ⩽0.05/12=0.004.