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Asian Pac J Allergy Immunol ; 23(2-3): 165-8, 2005.
Artículo en Inglés | MEDLINE | ID: mdl-16252848

RESUMEN

The presence of rheumatoid factor (RF) is one of the clinical criteria for the diagnosis of rheumatoid arthritis (RA). The cutoff point of RF assays is usually based on a reference level obtained from normal subjects in the same population as the patients. We evaluated 63 rheumatoid arthritis (RA), 25 other arthritis patients and 110 blood donors. Their rheumatoid factors (RF) ranged from < 9.9 to 2,264, < 9.9 to 262, and < 9.9 to 66 mIU/ml, respectively. The sensitivity at different cutoff points of 15, 20, and 25 mIU/ml was 92.1%, 90.5%, and 88.9%, respectively. The specificity at the same cutoff points was 81.5%, 84.4%, and 85.2%, respectively. Having minimally sacrificed the sensitivity, we recommend using a higher RF cutoff to increase specificity.


Asunto(s)
Artritis Reumatoide/inmunología , Factor Reumatoide/sangre , Adulto , Anciano , Anciano de 80 o más Años , Artritis Reumatoide/epidemiología , Estudios de Casos y Controles , Femenino , Humanos , Factores Inmunológicos/sangre , Masculino , Persona de Mediana Edad , Sensibilidad y Especificidad , Tailandia/epidemiología
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