TABLE 1.

Levels of calprotectin in stored patient joint fluids

Patient diagnosis	No. of samples	Amt of Calp (μg/ml)b
Pseudogout	3	377.82 ± 121.4
Lyme arthritis	32	362.1 ± 69.2
Inflammatory arthritis	5	379.6 ± 33.0
Othera and unknown	26	382.8 ± 103.6
Total	63

^aIncludes juvenile rheumatoid arthritis, seronegative Lyme, leukemia, sickle cell disease, and Still's disease.

^bPatient samples were assayed by specific enzyme-linked immunosorbent assay for calprotectin (Calp) using rCalp as a standard. Data shown are means ± standard errors of the means for three determinations per patient sample.