Two hundred and two eligible patients were included in the studys sample. The data were recorded consecutively, and well standardized clinical criteria were used to define a diagnosis including severity of the disease and its clinical evolution. Factors associated with unfavorable evolution were also determined.
Doscientos dos pacientes elegibles para el estudio fueron incluidos en la muestra, los datos fueron tomados en forma consecutiva y se utilizaron criterios clínicos bien estandarizados para la definición del diagnóstico, la severidad de la enfermedad y la evolución clínica; igualmente, se determinaron los factores asociados con una evolución desfavorable.