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Objective To evaluate the application value of elastic index difference (EID) in identifying benign or malignancy masses of breast imaging reporting and data system (BI-RADS) 3-5.Methods Data of 193 lesions in 164 patients with ultrasonic diagnosed as BI-RADS 3-5 breast masses were retrospectively analyzed.All the cases were confirmed pathologically.The EID of masses and normal glands were measured with elastography quantitative analysis software.BIRADS 3-5 breast masses were diagnosed as malignant when EID≥2.5,which was the criteria for BI-RADS reclassification.ROC curve was drawn,and the area under the curve (AUC) was calculated.The diagnostic accuracy and AUC of malignant breast tumors with the methods of BI-RADS and BI-RADS combined with EID were compared.Results Taking pathological results as gold standard,the sensitivity,specificity,accuracy of BI-RADS in detecting malignant tumors were 96.00％ (72/75),67.80％ (80/118),78.76％ (152/193),and those of BI-RADS combined with EID were 97.33％ (73/ 75),83.05％ (98/118),88.60％ (171/193),respectively.The AUC of BI-RADS combined with EID (0.931) was higher than that of BI-RADS (0.875;Z=2.06,P＜0.05).The statistical difference of accuracy was found between BI-RADS and BI-RADS combined with EID methods (x2 =15.21,P＜0.05).Conclusion The combination of BI-RADS and EID is better than simple using BI-RADS in identifying benign or malignancy of breast tumors.
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En el presente estudio se aplicó un entrenamiento pliométrico adaptado a un grupo de niños (n=15) no deportistas (12,8±0,8 años; 1,56±0,09 M; 48,7±8.5 Kg.), durante un período de seis semanas de entrenamiento (dos veces por semana). El objetivo fue demostrar si es posible aumentar la potencia (P) de extremidades inferiores mediante el aumento del índice elástico (IE). Se midieron los saltos Squat Jump (SJ), y Countermovement Jump (CMJ) y se calculó P e IE. Los resultados del pre-entrenamiento (SJ=26,51±5,1 cm; CMJ=28,52±6,5 cm; P=1834±853,04 W; IE 8,17±3,7 %) y post-entrenamiento (SJ=28,46±6,2 cm; CMJ=32,07±6,9 cm; P=2018±871,39 W; IE=13,23±1,9 %) indican que se aumentó significativamente la variable IE (p0,05). Los resultados obtenidos demuestran que este tipo de entrenamiento pliométrico puede estimular el componente elástico y neuromuscular en desmedro del componente contráctil, al obtenerse una ganancia relativa de potencia, situación preponderante en la etapa dedesarrollo de los niños.
This study aims to determine the current state of the relation between these variables, in studentsof the Rafael J. Mejia School, in Sabaneta. A stratified simple of 207 students (99 noys, 44%108 girls, 56%) was randomly selected from a total of 455 students. We applied measurementprocedures and evaluation proposed by J uregui and Ordo¤ez (1993). The results showed that aconsiderable proportion of the sample was above the 75th percentile for anthropometric tests andskinfolds; below the 25th percentile in physical abilities. This suggests that there is a tendency inthese children to obesity and physical inactivity.