Sensitivity to change of joint count composite indices in 72 patients with systemic sclerosis.

OBJECTIVES: We validated the responsiveness of joint count composite indices (JCCIs) in 72 patients with systemic sclerosis (SSc). METHODS: Changes in Disease Activity Score of 28 Joints using ESR and CRP (DAS28-ESR, DAS28-CRP), Simplified Disease Activity Index (SDAI) and the Clinical Disease Activity Index (CDAI) were evaluated in a one-year follow-up study. Charts of patients including swollen/tender joint counts, laboratory signs of inflammation, and visual analogue scales referring to disease activity, severity and pain were also blindly categorized by two rheumatologists as improved, unchanged or deteriorated. These categories were used as references for the determination of effect size (ES) and standardised response mean (SRM). RESULTS: Articular inflammation improved in 15, deteriorated in 12, and remained unchanged in 45 (63%) patients with SSc based on the concordant opinion of two clinical investigators. All four JCCIs were sensitive to changes (ES>1; SRM>1). The correlation between changes in JCCIs and the physicians' evaluation was high (r >0.68; p<0.001). Arthritis was predominantly prone to change in patients with high JCCIs, impaired functional status, anti-RNA polymerase III antibodies and patients on DMARD therapy. Synovitis was more prevalent in patients with early diffuse SSc, and tended to improve during the follow-up. CONCLUSIONS: All four JCCIs were sensitive to changes, if tender/swollen joints were present at baseline. Articular inflammation was most prone to change in patients with high JCCIs, impaired functional status and already decreased health-related quality of life at baseline.

Efficacy of intensive hand physical therapy in patients with systemic sclerosis.

OBJECTIVES: To evaluate the efficacy of a three-week period of complex and intensive hand physical therapy on hand function in patients with systemic sclerosis (SSc). METHODS: Thirty-one patients with SSc were treated. Hand stretching exercises, ergotherapy supplemented with thermal and mud baths, whirlpool therapy and soft tissue massage were daily used during a three-week period. The control SSc group (n=22) received similar management for their large joints leaving out their hands. The primary outcomes of this study were the Health Assessment Questionnaire (HAQ) and the Disabilities of the Arm, Shoulder and Hand (DASH). Hand Anatomic Index (HAI), Cochin Hand Function (CHFT) and clinical characteristics were also assessed before starting the therapy and six months afterwards. RESULTS: Six months after the investigation period, only the group receiving hand physical therapy showed improvement in HAQ and DASH scores compared to the baseline values (p<0.05). The improvement in median HAQ value (25%-75% quartiles) reached the clinical meaningful rate (baseline 1.125/0.625-1.625/ versus 0.75/0.25-1.5/ at six months). Visual analogue scales of global pain (p<0.01) and Raynaud's phenomenon (p<0.05) also had better results than at baseline. HAI, gripping strength and CHFT also showed some improvement, but did not reach the significance level of change by the end of the six-month observation period. CONCLUSIONS: The complex physical therapy caused favourable changes in both the HAQ and the DASH indicating that this particular program had some long-term beneficial effect on hand function in patients with SSc.

Validation of disease activity indices using the 28 joint counts in systemic sclerosis.

OBJECTIVES: To validate the Disease Activity Score 28 using ESR (DAS28-ESR) and CRP (DAS28-CRP), the Simplified Disease Activity Index and the Clinical Disease Activity Index used in RA for SSc patients. METHODS: Seventy-seven SSc patients, 40 RA patients, 20 patients with primary RP (PRP) and 28 healthy volunteers were assessed. Besides the disease activity composite indices, the European Scleroderma Study Group Activity Index (EScSG-AI), the HAQ-DI, the Cochin Hand Function Scale and the Short Form Health Survey (SF36) were evaluated. The validation procedure included the assessment for truth, discrimination and feasibility. RESULTS: DAS28-ESR, DAS28-CRP, Simplified Disease Activity Index and Clinical Disease Activity Index showed significant correlation with EScSG-AI, HAQ-DI, Cochin Hand Function Scale and the physical component of SF36 (P < 0.001). All four indices discriminated patients with SSc from RA, PRS and healthy controls, respectively (P < 0.01). With the exception of DAS28-CRP, the other three indices also discriminated between subgroups of SSc based on value of EScSG-AI (⩽3 and >3) (P < 0.05). All four disease activity composite indices showed a good inter- and intraobserver reliability based on repeated measures of two independent investigators (P < 0.001). CONCLUSION: All four disease activity composite indices were found to be valid measures for assessing arthritis in SSc. DAS28-ESR showed the best performance regarding reliability and construct validity.