Table 2

Patients hospitalised for a first episode of arthritis in 2008–2009: aetiology and patient characteristics

MaleAge at admission (years), median (IQR)Autumn-
winter season
Length of hospital stay (days), median (IQR)Joint aspiration
Number of patientsPer centnPer centnPer centnPer cent
Total1731009253.22.7 (1.3–6.1)5733.17 (5–10)14785.0
 Septic arthritis7543.439521.5 (1.1–3.4)2330.77 (6–8)7498.7
 JIA148.1428.64.7 (2.5–10.9)750.06.5 (3–11)535.7
 No definitive diagnosis*7040.44462.93.2 (1.7–6.5)2130.07 (5–10)6187.1
 Kawasaki disease31.7266.72.0 (0.8–9.2)266.78 (6–12)133.3
 Haemarthrosis31.7004.7 (3.5–12.5)133.31 (1–1)266.7
 Malignant disease21.20010.1 (6.3–13.9)0051.5 (48–55)150.0
 Others†63.535013.4 (11.6–14.9)480.08.5 (6–10)350.0
p Value  0.04<0.01‡0.230.44<0.01
  • *Arthritis without any definitive diagnosis indicates arthritis with no established association with infection and that did not fulfil the classification criteria for JIA or other well-established diagnoses (haemarthrosis, Kawasaki disease, malignant disease, Gaucher disease, systemic lupus erythematosus, villo-nodular synovitis, dermatomyositis and chronic recurrent multifocal osteitis).

  • †Others: one Gaucher disease, one systemic lupus erythematosus, two villo-nodular synovitis, one dermatomyositis and one chronic recurrent multifocal osteitis.

  • ‡p Value is for septic arthritis versus JIA.

  • JIA, juvenile idiopathic arthritis.