Table 1 Patient characteristics at study onset
| Â | All patients | Trajectory: | Statistical analysis | |||
|---|---|---|---|---|---|---|
Low pain | Variable pain | High pain | F value/Chi-Square | P value | ||
No. of patients | 97 | 45 (46.4%) | 30 (30.9%) | 22 (22.7%) | Â | Â |
 Age at JIA onset | 9.62 (4.86) | 9.51 (4.71) | 9.96 (4.88) | 9.40 (5.31) | 0.11 | 0.90 |
 Age at study onset | 16.40 (1.21) | 16.19 (1.18) | 16.46 (1.16) | 16.76 (1.31) | 1.67 | 0.19 |
 Years since JIA onset | 6.78 (5.17) | 6.68 (4.97) | 6.49 (5.33) | 7.36 (5.55) | 0.19 | 0.83 |
Sex: | Â | Â | Â | Â | 8.05 | 0.018 |
 Female | 55 (56.7%) | 24 (53.3%) | 13 (43.3%) | 18 (81.8%) |  |  |
 Male | 42 (43.3%) | 21 (46.7%) | 17 (56.7%) | 4 (18.2%) |  |  |
Weeks between: | ||||||
 Visit 1 and 2 | 24.12 (4.11) | 24.24 (4.16) | 24.30 (4.50) | 23.64 (3.55) | 0.20 | 0.82 |
 Visit 1 and 3 | 49.11 (5.74) | 49.27 (4.92) | 48.63 (6.91) | 49.45 (5.77) | 0.16 | 0.86 |
JIA subtype: | Â | Â | Â | Â | 11.77 | 0.067 |
 Polyarticular course | 54 (55.7%) | 21 (46.7%) | 16 (53.3%) | 17 (77.3%) |  |  |
 Oligoarticular | 6 (6.2%) | 4 (8.9%) | 1 (3.3%) | 1 (4.5%) |  |  |
 Enthesitis Related | 32 (33.0%) | 15 (33.3%) | 13 (43.3%) | 4 (18.2%) |  |  |
 Systemic | 5 (5.2%) | 5 (11.1%) | 0 (0.0%) | 0 (0.0%) |  |  |
JIA activity markers: | ||||||
 PGA (cm) | 2.40 (2.52) | 1.40 (2.11) | 3.11 (2.73) | 3.47 (2.31) | 7.64 | 0.001 |
 No. of active joints | 0 (0–2) | 0 (0–1) | 1 (0–1) | 0 (0–2) | 2.06 | 0.13 |
Medications: | ||||||
 No. taking DMARDs | 67 (69.1%) | 27 (60.0%) | 22 (73.3%) | 18 (81.8%) | 3.66 | 0.16 |
 No. taking Biologics | 40 (41.2%) | 18 (40.0%) | 12 (40.0%) | 10 (45.5%) | 0.21 | 0.90 |
 No. taking Steroids | 16 (16.5%) | 4 (8.9%) | 7 (23.3%) | 5 (22.7%) | 3.53 | 0.17 |