A direct relationship was found between the presence of rheumatoid arthritis and diagnosis of positive secondary SS diagnosis. This relationship was established with the χ test, where p < 0.001 was obtained, OR equal to 3.25 with confidence interval of 95% and rank of 1.8 to 5.6. Therefore, for those patients who are suspected to be afflicted with SS and exhibit rheumatoid arthritis, the risk of presenting the disease is trebled.
Se encontró una asociación directa entre la presencia de la artritis reumatoide y el diagnóstico de SS secundario positivo mediante la prueba de χ, obteniendo una p < 0.001, razón de momios igual a 3.25 con un intervalo de confianza del 95% y un rango de 1.8 a 5.6, por lo que en aquellos pacientes con sospecha de tener SS y que tengan artritis reumatoide existe un riesgo tres veces mayor de presentar la enfermedad.