Table 1 Differences among the three groups
Category | Group A (n = 30) | Group B (n = 12) | Group C (n = 23) | p -value |
|---|---|---|---|---|
Male (n, %) | 23 (76.7%) | 10 (83.3%) | 14 (60.9%) | 0.285 |
Age (yr) | 51.50 (31) | 50.50 (29) | 59 (10) | 0.045 |
BMI (kg/m2) | 24.62 ± 3.88 | 23.14 ± 3.66 | 24.69 ± 3.97 | 0.480 |
Symptom duration (days) | 9 (9) | 14 (12) | 10 (16) | 0.310 |
Fever (n, %) | 14 (46.67%) | 5 (41.67%) | 7 (30.43%) | 0.485 |
Systemic sepsis (n, %) | 0 | 1 (8.3%) | 1 (4.4%) | 0.335 |
Comorbidities | Â | Â | Â | Â |
 Smoking (n, %) | 12 (40%) | 4 (33.3%) | 7 (30.4%) | 0.760 |
 Alcoholism (n, %) | 6 (20%) | 2 (16.7%) | 1 (4.4%) | 0.250 |
 Diabetes (n, %) | 5 (16.7%) | 3 (25%) | 3 (13.0%) | 0.669 |
 Hypertension (n, %) | 4 (13.3%) | 2 (16.7%) | 6 (26.1%) | 0.487 |
 Gout (n, %) | 4 (13.3%) | 1 (8.3%) | 3 (13.1%) | 0.413 |
 Rheumatoid arthritis (n, %) | 5 (16.7%) | 1 (8.3%) | 8 (34.8%) | 0.132 |
 Age-adjusted Charlson Comorbidity Index | 2 (3) | 2 (4) | 3 (2) | 0.363 |
Knee arthrocentesis | Â | Â | Â | Â |
 White blood-cell count (/µL) | 18,000 (37160) | 20,960 (46220) | 22,800 (23320) | 0.978 |
 Polymorphonuclear cells (%) | 90 (24.25) | 90 (48) | 93 (8.50) | 0.494 |
Blood | Â | Â | Â | Â |
 White blood-cell count (109/L) | 8.28 (3.14) | 7.74 (2.91) | 8.53 (4.16) | 0.399 |
 Neutrophils (109/L) | 6.19 (2.72) | 5.84 (2.90) | 6.19 (4.25) | 0.570 |
 CRP (mg/L) | 96 (105.15) | 91.7 (107.1) | 86.7 (116.98) | 0.301 |
 ESR (mm/h) | 79.57 ± 30.38 | 58.08 ± 30.98 | 69.27 ± 26.77 | 0.095 |
Gächter (n, %) |  |  |  |  |
 I | 3 (10%) | 3 (25%) | 2 (8.7%) | 0.339 |
 II | 13 (43.3%) | 6 (50%) | 14 (60.9%) | 0.449 |
 III | 14 (46.7%) | 3 (25%) | 5 (21.7%) | 0.128 |
 IV | 0 | 0 | 2 (8.7%) | 0.152 |
Kellgren and Lawrence (n, %) | Â | Â | Â | Â |
 0 | 2 (6.7%) | 0 | 1 (4.3%) | 0.647 |
 I | 3 (10%) | 2 (16.7%) | 0 | 0.174 |
 II | 14 (46.7%) | 6 (50%) | 11 (47.8%) | 0.981 |
 III | 11 (36.7%) | 4 (33.3%) | 10 (43.5%) | 0.811 |
 IV | 0 | 0 | 1 (4.3%) | 0.396 |