OA | Inflammatory / RA | Gout | Infection | |
WCC per mm3 | 2000 | < 75 000 | < 50 000 | > 80 000 |
% Neutrophils / PMN | < 25% | < 50% | > 75% | > 75% |
Viscosity | Normal | Variable | High | Low |
Glucose (percentage relative to serum) | Normal | Low | Normal | Low |
Other | Crystals |