Table 1 Baseline characteristics of children with juvenile idiopathic arthritis (JIA) and healthy controls tested for dynamic joint function
From: Dynamic knee joint function in children with juvenile idiopathic arthritis (JIA)
| Rheumatology cohort N = 54 | |
|---|---|
| Gender, male: female | 21:33 |
| Median age in years (range) | 11.3 (5.7 – 19.6) |
| Mean disease duration in month (range) | 20.9 (0 – 161) |
| JIA subtypes | |
| • Oligoarticular arthritis | 18 |
| • Polyarticular arthritis | 5 |
| • Systemic arthritis | 4 |
| • Psoriatic arthritis | 6 |
| • Enthesitis-related arthritis | 6 |
| • Unclassified arthritis | 5 |
| Non-JIA rheumatic diseases | |
| • Dermatomyositis with arthritis | 2 |
| • Other | 8 |
| JIA cohort N = 36 | |
| Gender, male: female | 12: 24 |
| Median age in years (range) | 12.3 (5.7 – 19.6) |
| Mean disease duration in month (range) | 25.8 (0 – 161) |
| JIA subtypes | |
| • Oligoarticular arthritis | |
| ◦Extended | 6 |
| ◦Persistent | 9 |
| • Polyarticular arthritis | 4 |
| • Systemic arthritis | 3 |
| • Psoriatic arthritis | 5 |
| • Enthesitis-related arthritis | 5 |
| • Unclassified arthritis | 4 |
| Joint status (66 knee joints tested) | |
| • active arthritis | 14 |
| • inactive arthritis, history of arthritis | 28 |
| • unaffected joints | 24 |
| Current treatments | |
| • methotrexate | 10 |
| • oral corticosteroidssteroids | 5 |
| • NSAIDs | 15 |
| • untreated | 12 |
| Inception cohort N = 8 | |
| Gender male: female | 2: 6 |
| Median age in years (range) | 10.5 (6.6 - 14.8) |
| Median height in cm (range) | 141.8 (116.7 - 163.0) |
| Median weight in kg (range) | 35.9 (20.7 - 57.1) |
| Handedness right/left/both | 7/0/1 |
| JIA disease duration after diagnosis | |
| ≤1 month | 4 |
| >1 month | 4 |
| JIA subtypes | |
| • Oligoarticular arthritis | 4 |
| • Psoriatic arthritis | 1 |
| • Enthesitis-related arthritis | 2 |
| • Unclassified arthritis | 1 |
| Side of affected knee joint right: left | 4: 4 |
| Current treatments | |
| • NSAID | 3 |
| • untreated | 5 |
| Controls N = 9, 18 joints tested | |
| Gender male: female | 5 4 |
| Median age in years (range) | 12.1 (7.3 – 19.3) |
| Median height in cm (range) | 156.0 (130.0 - 168.1) |
| Median weight in kg (range) | 42.9 (25.2 – 73.1) |
| Handedness right/left/both | 7/1/1 |
