PARTES DEL “ABSTRACT”

Ejercicio 1: Ordene las siguientes oraciones del “abstract”, escribiendo la letra que corresponda en el casillero designado para INTRODUCCÍON, METODOLOGÍA, DESARROLLO oCONCLUSIÓN:


A METHOD FOR ANALYZING DISEASE-SPECIFIC MORTALITY WITH MISSING CAUSE OF DEATH INFORMATION.Ruan PK, Gray RJ. Department of Biostatistics, Harvard University, Dana-Farber Cancer Institute,44 Binney Street, Boston, MA, 02115, USA, pruan@hsph.harvard.edu.

A In some applications, a method called "log-rank subtraction" has been applied to these problems. There has been no systematicstudy of this methodology, though.

B Simulation studies indicate that the tests are unbiased and have reasonable power. The results are also illustrated with data from a breast cancer study.

C Inthis paper, we examine a method for analyzing competing risks data where the failure type of interest is missing or incomplete, but where there is an intermediate event, and only patients whoexperience the intermediate event can die of the cause of interest.

D We investigate the statistical properties of the method and further propose a modified method by including a weight function in theconstruction of the test statistic to correct for potential biases. A class of tests is then proposed for comparing the disease-specific mortality in the two groups. The tests are based on comparing thedifference of weighted log-rank scores for the failure type of interest. We derive the asymptotic properties for the modified test procedure.

UN METODO PARA ANALIZAR LA MORTALIDAD DE UNAENFERMEDAD-ESPECÍFICA SIN TENER INFORMACIÓN SOBRE LA CAUSA DE MUERTE

A En algunas aplicaciones, un método llamado “sustracción de rango-logarítmico” ha sido aplicado a estos problemas. Aunque, no ha habidoningún estudio sistemático de esta metodología.

B Los estudios de simulación indican que los tests no son sesgados (son imparciales) y que tienen una validez razonable. Los resultados, también,... [continua]

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