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Vol. 33. Núm. 4.
Páginas 122-129 (Agosto 2006)
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Vol. 33. Núm. 4.
Páginas 122-129 (Agosto 2006)
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Variabilidad de las concentraciones séricas de CA 125 en mujeres sanas en función de la edad, situación hormonal y otras condiciones
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B. Barceló, A. Barceló, M. Riesco, G. Pérez, B. Castanyer, M. Vila
Servicio de Análisis Clínicos. Hospital Universitario Son Dureta. Palma de Mallorca. España
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Resumen

Los conocimientos relativos a los factores que influyen en las concentraciones de CA 125 ha conducido a cuestionarse la validez de un único valor límite. Los objetivos del trabajo fueron valorar los valores de CA 125 en función de la edad, presencia o ausencia de menopausia, índice de masa corporal (IMC), hábito tabáquico, paridad, variabilidad durante el ciclo menstrual, variabilidad biológica, índice de individualidad y diferencia crítica. Se incluyó a 65 mujeres sanas distribuidas en 2 grupos: sin y con menopausia. Los principales resultados demuestran que existe una clara relación entre las concentraciones de CA 125 y la edad, que en mujeres sin menopausia la concentración de CA 125 fue superior respecto a las mujeres con menopausia, con p95 de 30,52 y 18,30 U/ml, respectivamente. No encontramos variaciones durante el ciclo menstrual, aunque existe la probabilidad de encontrar valores superiores al valor límite convencional durante la fase folicular. La variabilidad biológica intra e interindividual en mujeres sin menopausia fue del 14,23 y el 43,57%, respectivamente, mientras que la variabilidad biológica interindividual en mujeres con menopausia fue del 36,25%. La diferencia crítica fue del 42,73% y el índice de individualidad de 0,11. No encontramos diferencias en función de la paridad ni del hábito tabáquico. Tampoco encontramos una relación respecto al IMC.

En conclusión, el conocimiento de factores que influyen en las concentraciones séricas de CA 125, así como la adaptación de valor límite en función de diferentes situaciones fisiológicas y clínicas puede permitir una mejor interpretación e identificación de subgrupos con un riesgo de presentar cáncer de ovario.

Abstract

Knowledge of the factors influencing serum concentrations of CA 125 have led the validity of a single cut-off value to be questioned. The aims of the present study were to evaluate CA 125 levels according to age, menopause, body mass index (BMI), smoking, parity, variability during the menstrual cycle, biological variation, index of individuality (II), and critical difference (CD). Sixty-five healthy women distributed in 2 groups, non-menopausal and menopausal, were included.

The main results of the study demonstrate that there is a clear relationship between CA 125 levels and age: serum levels of CA 125 were significantly lower in menopausal women than in non-menopausal women, with 95th percentiles of 30.52 U/ml and 18.30 U/ml, respectively. No variations were found during the menstrual cycle, although a CA 125 value higher than the conventional cut-off value was observed during the follicular phase. In non-menopausal women, intra- and interindividual biological variations were 14.23% and 43.57%, while in menopausal women interindividual biological variation was 36.25%. CD was 42.73% and II was 0.11. No significant differences were found between smokers and nonsmokers or according to parity. No relationship was found between CA 125 levels and BMI.

In conclusion, knowledge of the factors influencing serum concentrations of CA 125 according to different physiologic and clinical factors and careful adjustment of cut-off values could improve interpretation and identification of subgroups at risk for ovarian carcinoma.

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