Fig. 2.

A comparison of DAS28-CRP in RA and PsA across 12 years. a Line graph representing DAS28-CRP responses to biologic therapy at 1 year and 12 years in RA [solid line (n = 274)] and PsA [dotted black line (n = 129)]. Remission is represented by the dotted grey line at DAS28-CRP value of 2.6. DAS28-CRP is significantly lower in PsA at all time points. b Line graph representing DAS28-CRP responses to biologic therapy at 1 year and 12 years in a cohort matched for baseline DAS28-CRP (moderate disease activity) in RA [solid line (n = 89)] and PsA [dotted black line (n = 65)]. Remission is represented by the dotted grey line at DAS28-CRP value of 2.6. Values are expressed as mean +/− SEM; **p < 0.001 between RA and PsA at that timepoint