ABSTRACT
Resumen OBJETIVO Determinar si el tiempo trascurrido a partir de la menopausia repercute en el deterioro cognitivo y si la terapia hormonal tiene alguna influencia en éste. MATERIALES Y MÉTODOS Estudio observacional, transversal, prospectivo, comparativo y abierto en el que se estudiaron mujeres posmenopáusicas a quienes se aplicó el Mini Mental State Examination (MMSE) y la Menopause Rating Scale (MRS). Se analizaron las diferencias según el tiempo trascurrido a partir de la menopausia entre quienes recibían o no terapia hormonal. Se realizó prueba t de Student y análisis de correlación de Pearson. RESULTADOS Se estudiaron 94 mujeres que se dividieron en dos grupos; en el grupo I las que recibieron terapia hormonal (n = 46) y en el II, sin ésta (n = 48). La puntuación del MMSE fue mayor en el grupo I; la puntuación en orientación espacial, recuerdo diferido y lenguaje fue mayor en el grupo con 10 o menos años después del inicio de la menopausia, que quienes tenían más de ese tiempo y hasta 20 años; lo mismo ocurrió con la puntación de la MRS. En el grupo II la puntuación en orientación temporal fue mayor en el grupo con 10 o menos años de posmenopausia al compararlo con el de más de 10 y hasta 20 años y con el de más de 20 años. Lo mismo sucedió para fijación-recuerdo, cálculo, lenguaje y puntuación del MMSE. En el grupo I hubo correlación entre la puntuación del MMSE y la edad -0.746, p < 0.001 y el tiempo trascurrido a partir de la menopausia -0.722, p < 0.001. En el grupo II la hubo entre la puntuación en el MMSE y la edad -0.863, p < 0.001 y el tiempo desde la menopausia -0.873, p < 0.001. CONCLUSIÓN La edad es un factor que influye negativamente en la función cognitiva pero con menor afectación en las mujeres que recibieron terapia hormonal.
Abstract OBJECTIVE To determine if the time since menopause has effect on cognitive status and if hormone therapy (HT) influences it. MATERIALS AND METHODS Observational, cross-sectional, prospective, comparative, open study in which postmenopausal women were evaluated with the Mental Mini State Examination (MMSE) and the Menopause Rating Scale (MRS). The differences were analyzed according to time since menopause among those that received or non-HT. Student t test and Pearson's correlation analysis were done. RESULTS Ninety-four women were studied and divided in two groups: Group I, with HT (n =46) and Group II, without HT (n =48). The MMSE score was greater in group I, also space orientation, differed memory and language scores were greater in the group with 10 or less years since menopause when comparing it with those with more than 10 and up to 20 years and similar happened with the MRS score. In group II, the score in temporary orientation was greater in the group with 10 or less years, when compared with that with more than 10 and up to 20 years group; and with the group with more than 20 years similar happened for fixation-memory, calculation, language and MMSE score. In group I correlation was found between MMSE score and age -0.746, p < 0.001 and time since menopause -0.722, p < 0.001. In group II it was between MMSE score and age -0.863, p < 0.001 and time since menopause -0.873, p < 0.001. CONCLUSION Age negatively influenced the cognitive function, but this was greater in the group without HT.
ABSTRACT
Objective To explore the effect of weightlessness simulation on processing speed of mental rotation of males in 72 h head-down tilt,in order to further reveal human performance changes caused by weightlessness.Methods During 72 h weightlessness simulation (9 am day 1 to 9 pm day 4,head-down tilt started from 9 pm day 1),16 male subjects were processed speed of rotation data byhand picture mental rotation (test 8 times),using self cross-references design,and the variation of processing speed of mental rotation by duration was analyzed.Results The linear regression analysis showed,the reaction time of each time point for each subject as the independent variable,the angle of rotation as the dependent variable,with the extension of simulated weightlessness time.The intercept(constant term of the regression equation),indicating the processing speed of non-rotation,were gradually increased with HDT time,but didn(t) reached significantly difference (F(3,14) =0.551,P =0.650) ;the slope(Regression coefficient of the regression equation),indicating the processing speed of rotation.were gradually increased with HDT time,and reached the significantly difference (F(3,14) =4.338,P =0.009).The value of intercept and slope was like upside-down U in three days,and reached the highest value at day 2.Conclusion Weightlessness simulation have affection on the speed of mental rotation,especially on the rotation speed.