From: Serum proteome analysis identifies a potential biomarker for axial psoriatic arthritis
 | Discovery cohort | Verification cohort | ||||
---|---|---|---|---|---|---|
axPsA (n = 20) | pPsA(n = 20) | P | axPsA (n = 37) | pPsA(n = 51) | P | |
Gender (male), n (%) | 14 (70.0) | 9 (45.0) | 0.110 | 27 (73.0) | 20 (39.2) | 0.002 |
Age, mean (SD) | 41.8 (11.9) | 40.1 (11.4) | 0.647 | 43.8 (11.1) | 42.2 (10.2) | 0.696 |
Comorbidity | ||||||
  Hypertension, n (%) | 4 (20.0) | 4 (20.0) | 1.000 | 9 (24.3) | 9 (17.6) | 0.443 |
  Diabetes, n (%) | 1 (5.0) | 0 (0.0) | 1.000 | 3 (8.1) | 1 (2.0) | 0.305 |
  Hyperlipidemia, n (%) | 6 (30.0) | 5 (25.0) | 0.723 | 8 (21.6) | 10 (19.6) | 0.817 |
Ever smoker, n (%) | 11 (55.0) | 6 (30.0) | 0.110 | 20 (54.1) | 10 (19.6) | 0.001 |
BMI, mean (SD) | 24.7 (5.0) | 25.8 (4.3) | 0.452 | 25.1 (21.8, 27.8)a | 24.3 (22.0, 27.1)a | 0.826 |
SJC, median (IQR) | 2.0 (0.3, 3.8) | 3.5 (0.3, 5.5) | 0.317 | 1.0 (0.0, 4.0) | 3.0 (0.0, 6.0) | 0.131 |
TJC, median (IQR) | 2.0 (0.3, 6.0) | 6.4 (1.8, 10.5) | 0.141 | 1.5 (0.0, 6.0) | 4.5 (2.0, 8.8) | 0.012 |
Extra-articular manifestations (current) | ||||||
 PASI, median (IQR) | 2.7 (0.4, 21.4) | 1.4 (0.0, 3.4) | 0.031 | 3.0 (0.3, 16.3) | 1.3 (0.1, 3.3) | 0.081 |
 Enthesitis, n (%) | 6 (16.2) | 14 (27.5) | 0.214 | 6 (16.2) | 14 (27.5) | 0.304 |
 Dactylitis, n (%) | 2 (10.0) | 3 (15.0) | 1.000 | 5 (13.5) | 7 (13.7) | 0.977 |
Extra-articular manifestations (ever) | ||||||
  Dactylitis, n (%) | 4 (20.0) | 4 (20.0) | 1.000 | 10 (27.0) | 12 (23.5) | 0.708 |
  Enthesitis, n (%) | 11 (55.0) | 12 (60.0) | 1.000 | 21 (56.8) | 31 (60.8) | 0.704 |
  IBD, n (%) | 0 (0.0) | 0 (0.0) | / | 1 (2.7) | 2 (3.9) | 1.000 |
  Uveitis, n (%) | 1 (5.0) | 1 (5.0) | 1.000 | 4 (10.8) | 1 (2.0) | 0.157 |
CRP, median (IQR) | 9.8 (4.8, 33.2) | 4.5 (1.1, 28.9) | 0.176 | 8.4 (3.8, 26.8) | 2.7 (0.9, 13.0) | 0.005 |
ESR, median (IQR) | 27.5 (12.0, 63.3) | 12 (3.5, 27.7) | 0.085 | 14 (10.0, 38.0) | 11.0 (4.3, 22.5) | 0.043 |
HLA-B27 (+), n (%) | 8 (40.0) | 2 (10.0) | 0.028 | 12 (38.7) | 4 (8.7) | 0.001 |
DAPSA, median (IQR) | 19.6 (10.4, 29.7) | 20.5 (10.2, 27.9) | 0.968 | 14.9 (8.4, 27.3) | 18.3 (10.3, 26.2) | 0.455 |
DAS28-CRP, mean (SD) | 3.9 (1.9) | 3.5 (1.4) | 0.610 | 3.3 (1.4) | 3.3 (1.2) | 0.869 |
DAS28-ESR, mean (SD) | 3.6 (1.4) | 3.4 (1.2) | 0.472 | 3.4 (1.7) | 3.4 (1.3) | 0.887 |