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Table 3 Correlation between musculoskeletal ultrasound scores and calprotectin, acute phase reactants and disease activity indices

From: Calprotectin and TNF trough serum levels identify power Doppler ultrasound synovitis in rheumatoid arthritis and psoriatic arthritis patients in remission or with low disease activity

 

RA (n = 42)

PsA (n = 50)

Doppler score

 Calprotectin

0.570a

0.420b

 CRP

0.338b

0.058

 ESR

0.285

0.337b

 Albumin

−0.259

−0.322b

 DAS28-ESR

0.380b

0.384b

 SDAI

0.126

0.071

 CDAI

0.080

0.115

SH score

 Calprotectin

0.589a

0.423b

 CRP

0.044

0.092

 ESR

0.217

0.020

 Albumin

−0.336b

−0.210b

 DAS28-ESR

0.423b

0.284b

 SDAI

0.275

0.217

 CDAI

0.163

0.277

Global score

 Calprotectin

0.641a

0.446a

 CRP

0.105

0.122

 ESR

0.226

0.111

 Albumin

−0.332b

−0.237

 DAS28-ESR

0.446b

0.348b

 SDAI

0.280

0.195

 CDAI

0.172

0.266

  1. Abbreviations: CDAI Clinical Disease Activity Index, CRP C-reactive protein, DAS28-ESR 28-joint Disease Activity Score based on erythrocyte sedimentation rate, ESR erythrocyte sedimentation rate, PsA psoriatic arthritis, RA rheumatoid arthritis, SDAI Simple Disease Activity Index, SH synovial hypertrophy
  2. Data presented are Spearman’s ρ correlations
  3. a p < 0.001
  4. b p < 0.05