Laboratory  parameters Controls Patients
Range Mean± SD Range Mean± SD
ESR (mm) 5-13 8.3±2.8 5-144 47 ± 34.9
WBC (103 cell/μl) 4.4-6.1 5.1± 0.5 3.8-14 6.58 ±2.3
Haemoglobin (g/dl) 11.5-14.2 12 ±1.5 7.5-14.1 11.5 ± 2.4
S. Urea (mg/dl) 19-33 26±5.5 15-40 24 ±6.3
S. Creatinine (mg/dl) 0.45-0.8 0.65±0.1 0.6-1.5 0.65 ± 0.2
ALT (U/L; N <37) 17-28 22±2.6 10-45 23 ± 8.6
AST (U/L; N<37) 18-27 22±3.8 11-43 26 ± 9.9
RF positive  0% 61%
RF negative 100% 39%
ESR: Erythrocyte sedimentation rate;WBCs: White Blood Cells;ALT: Alanine Aminotransferase;AST: Aspartate Aminotransferase; RF: Rheumatoid Factor
Table 2: Laboratory investigations for control and patient groups.