Table 6

Spearman's correlation coefficient of composite scores with joint counts in patients with DIP involvement (according to classification of psoriatic arthritis (PsA) by Wright and Moll3) of IMPACT 2 and the observational data set

IMPACT 2ObservationalIMPACT 2ObservationalIMPACT 2ObservationalIMPACT 2Observational
DAS280.77***0.38*0.55***0.24; NS0.71***0.51**0.52**0.27; NS
SDAI0.74***0.55*0.71***0.37; NS0.68***0.68***0.66***0.40; NS
  • Given are correlation coefficients (Spearman's r).

  • * p<0.05,

  • ** p<0.01,

  • *** p<0.001.

  • IMPACT 2: N=40, observational data set: N=41.

  • CDAI, clinical disease activity index; DAREA, ‘Disease Activity index for REactive Arthritis’; DAS28, disease activity score using 28 joint counts; DIP, distal interphalangeal joint; IMPACT 2, Infliximab Multinational Psoriatic Arthritis Controlled Trial 2; SDAI, simplified disease activity index; SJC, swollen joint count; TJC, tender joint count.