Table 1B

 Clinical and laboratory features of patients with CNO

CNO subsetDelay before diagnosis (months)No of relapsesLeucocytes/l (×109)ESR (mm/1st h)CRP (mg/l)Ferritin (μg/l)IgG (mg/l)IgM (mg/l)IgA (mg/l)Duration of naproxen treatment (months)
Results are given as mean (SD).
Normal range of ferritin 2.3–63 μg/l. NA, not applicable.
Unifocal non-recurrent9.6NA8.6 (3.1)11 (8)1.425 (15)11.75 (1.69)1.28 (0.45)1.29 (0.37)7 (5.9)
Unifocal recurrent53.38.0 (3.1)15 (13)5.627 (18)10.11 (1.25)1.52 (0.44)1.51 (0.34)24 (30)
Multifocal non-recurrent9.6NA8.0 (1.6)16 (13)2.145 (14)10.80 (1.64)1.18 (0.44)2.04 (1.14)12 (14)
Multifocal recurrent (CRMO)9.23.59.6 (2.3)20 (12)15.665 (88)14.36 (2.95)2.24 (1.12)2.71 (1.91)27.1 (24.3)