Clinical characteristics of acute lymphoblastic leukaemia (ALL) children with joint involvement according to signs of arthritis
| Joint involvement | No arthritis | Arthritis | p Value | |
|---|---|---|---|---|
| n=53 | n=26 | n=27 | ||
| Initial trauma | 14% | 12% | 15% | 1.0 |
| Nocturnal pain | 6% | 4% | 7% | 1.0 |
| Number of joints involved | ||||
| 1 | 36% | 41% | 31% | 0.39 |
| 2 | 23% | 31% | 15% | 0.20 |
| 3 | 19% | 16% | 23% | 0.73 |
| 4 | 10% | 8% | 12% | 1 |
| >4 | 12% | 4% | 19% | 0.19 |
| Median number of joint | 2.5 | 2.1 | 2.8 | |
| Total median Symptom interval (days) | 30 | 28 | 45 | |
| Initial misdiagnosis | 68% | 36% | 88% | <0.01 |
| Reactive arthritis | 36% | 31% | 45% | 0.05 |
| Osteomyelitis | 17% | 5% | 19% | 0.05 |
| Juvenile idiopathic arthritis | 15% | 0% | 26% | 0.01 |
Bold type face is partly to highlight and partly to mark where there is value.