Table 1: Demographic and Clinical Characteristics of Patients with Erosive and Non-Erosive Hand Osteoarthritis (HOA)

Characteristics Erosive HOA (n=31) Non-Erosive HOA (n=22) p
Age (years) 65.55 ± 8.15 63.09 ± 10.85 0.551
Sex (females/ males) 31/0 22/0 -
Disease duration (years) 8.94 ± 7.74 7.16 ± 4.84 0.650
CRP (mg/l) 1.81 ± 1.15 1.79 ± 1.77 0.378
ESR (mm/1st hour) 13.26 ± 8.82 14.43 ± 9.10 0.530
AUSCAN total 41.55 ± 11.89 32.32 ± 10.17 0.003
Dreiser algo-functional index 18.45 ± 4.77 14.95 ± 4.67 0.005
Physical Examination (Mean Count of Affected Joints ± SD)
Deformity 11.84 ± 4.12 8.32 ± 4.74 0.008
Deviation 4.32 ± 3.05 1.09 ± 1.95 <0.001
Tenderness 9.16 ± 4.03 5.09 ± 3.31 <0.001
Effusion 4.39 ± 4.15 1.68 ± 2.17 0.014
Radiographs
Baseline Kallman score 58.90 ± 28.89 26.14 ± 18.57 <0.001
Kallman score at year 2 61.39 ± 28.67 26.73 ± 19.16 <0.001
Progression (difference from baseline to year 2) 2.48 ± 3.13 0.59 ± 1.59 0.002
Presence of knee OA (%) 70.0 59.1 0.425
Three Phase Bone Scintigraphy
Blood pool (count of inflamed joints) 3.90 ± 3.24 1.45 ± 2.14 0.002
Late phase (count of remodelled joints) 14.77 ± 6.28 6.00 ± 5.99 <0.001

Legend: n = number of patients, p = statistical significance, CRP = C-reactive protein; ESR = Erythrocyte Sedimentation Rate, AUSCAN = Australian/Canadian Osteoarthritis Hand Index, HOA = hand osteoarthritis. The data are expressed as the mean ± SD, unless stated otherwise.