Table 2 Concentrations (U/ml) (median values (IQR)) of anti-CCP2 antibodies in pre-patients, matched controls and RA patients

Controls (n = 276)^a

0.8

1.2

18.5

(IQR)

(0.5 to 1.1)

(0.8 to 2.1)

(11.1 to 34.3)

Pre-patients (n = 71)^b

1.1*

3.4 **

21.6 *

(IQR)

(0.6 to 2.1)

(1.2 to 55.0)

(10.1 to 55.3)

Patients (n = 53)^c

1.8***

14.0 ***

51.9***

(IQR)

(0.9 to 6.8)

(11.4 to 715.5)

(29.8 to 127.0)

p value¹

<0.001

<0.001

<0.001