Participant characteristics and sonographic enthesitis scores
| PsA patients (n=84) | Healthy Volunteers (n=25) | |
|---|---|---|
| Male, n (%) | 45 (54) | 12 (48) |
| Age, mean (SD) | 55 (11) | 47 (6)* |
| Disease duration, median years (IQR) | 8.0 (4.9–12.3) | |
| LEI, median (IQR) | 0.5 (0–2) | 0 (0–0)** |
| Ultrasound | ||
| MASEI, median (IQR) | 15.5 (11–22) | 13 (9–18) |
| Modified MASEI, median (IQR) | 12 (7.25–17) | 7.5 (5–9)** |
| structural components | 7 (3–10) | 3 (1–6)** |
| inflammatory components | 6 (3.5–8.5) | 3.5 (2–5.5) |
| Power Doppler | ||
| in any enthesis, n (%) | 74 (88) | 22 (88) |
| score 3, n (%) | 7 (8%) | 0 (0%) |
| locations, median (IQR) | 2 (1–3) | 2 (1–3) |
| if positive, median (IQR) | 1.5 (1.25–1.75) | 1.5 (1.25–1.5) |
PsA: Psoriatic Arthritis; SD: standard deviation, IQR: interquartile range; LEI: Leeds Enthesitis Index; MASEI: Madrid Sonographic Enthesitis Score; modified MASEI: MASEI with new PD scoring method (1: one spot of PD, 1.5: some spots of PD, 2: confluent signal, 3: severe signal) and without knee entheses thickness. Structural components: erosions, calcifications, structure. Inflammatory components: bursitis, thickness and PD signal. PD: Power Doppler. *P<0.01, **P<0.001 (Wilcoxon rank sum test).