Table 1

Association between clinical findings, inflammatory markers and ultrasound scores

SJTJLEIPtpainEGAPGAHAQdactylitisESRCRP
GSS-scoreNSNSNS0.33**NSNS0.41***NS
GSS-count0.42***NSNS0.26**NSNS0.35**NS
PD-j-scoreNSNSNS0.37**NSNS0.48***NS
PD-j-count0.48***0.30*NS0.34**NSNS0.47***NS
perisynNSNSNSNSNSNSNSNS
MASEI0.30*NSNSNS0.24*NSNS
PD-MASEINSNSNSNSNSNSNS
PD-MASEI+ENSNSNSNSNSNSNS
Sono-LEI0.24*NSNSNSNSNSNS
PD-LEINSNSNSNSNSNSNS
ultrasound-dactylitisNSNSNSNS0.41***NSNS
  • Correlation coefficients according to Spearman's rank correlation test are shown.

  • Significance levels were not corrected for multiple testing.

  • Ptpain, EGA and PGA were measured on a Visual Analogue Scale (range 0–100 mm) and are expressed in millimetres.

  • *p<0.05.

  • **p<0.01.

  • ***p<0.001.

  • –, not tested; CRP, C reactive protein (normal range 0–5 mg/L); dactylitis, clinical dactylitis score; ultrasound- dactylitis, ultrasound-defined dactylitis; EGA, evaluator's global assessment of disease activity; ESR, erythrocyte sedimentation rate (normal range 0–10 mm/first hour); GSS-count, number of joints with GSS-score ≥1; GSS-score, grey-scale synovitis score of joints; HAQ, Health Assessment Questionnaire; LEI, number of painful entheses according to Leeds Enthesitis Index; MASEI, Madrid Sonographic Enthesis Index; NS, not significant; PD-j-count, number of joints with PD-j-score ≥1; PD-j-score, power Doppler (PD) score of joints; PD-LEI, number of entheses (according to Sono-LEI) with PD-signals; PD-MASEI+E; number of entheses (according to MASEI plus lateral epicondyle) with PD-signals; PD-MASEI; number of entheses (according to MASEI) with PD-signals; perisyn, B-mode and/or PD-perisynovitis; PGA, patient's global assessment of disease activity; Ptpain, patients’ pain assessment; Sono-LEI, reduced enthesitis score focusing on lateral epicondyle, dist. Patella and Achilles tendons (ratings according to MASEI); SJ, swollen joint count; TJ, tender joint count.