. Author manuscript; available in PMC: 2017 Jul 1.

Published in final edited form as: Arthritis Rheumatol. 2016 Jul;68(7):1751–1757. doi: 10.1002/art.39638

Table 3.

Comparison of CPLM and POCRS results for the diagnosis of gout and pseudogout^*

	CPLM negative	CPLM positive	Total
Gout (MSU crystals)
POCRS negative	128	8	136
POCRS positive	2	36	38
Total	130	44	174
Pseudogout (CPPD crystals)
POCRS negative	151	1	152
POCRS positive	11	11	22
Total	162	12	174

A negative result means that no monosodium urate monohydrate (MSU) or calcium pyrophosphate dihydrate (CPPD) crystals were detected. A positive result means that MSU and/or CPPD crystals were detected. CPLM = compensated polarized light microscopy; POCRS = point-of-care Raman spectroscopy.