نتایج جستجو برای: modified log rank test
تعداد نتایج: 1157753 فیلتر نتایج به سال:
BACKGROUND Loss of 18q22.3 is a prognostic marker in pancreatic ductal adenocarcinoma (PDAC). This study investigated genes encoded by this cytoband. METHODS We studied mRNA/protein expression in radically resected (n = 130) and metastatic patients (n = 50). The role of CYB5A was tested in 11 PDAC cell lines and five primary cultures through retrovirus-mediated upregulation and small interfer...
Two-sample weighted log-rank statistics are used in the presence of right censoring to test whether failure times from two populations have diierent survival distributions. Kosorok (1998a) showed that large families of these statistics form stochastic processes indexed by weight functions and that these function-indexed statistics can be used to construct versatile test procedures simultaneousl...
A preliminary study has linked raised blast glutathione levels with chemoresistance in acute myeloid and lymphoblastic leukemia in adults and children. In this study, therefore, the relationship between leukemic blast glutathione levels and prognosis in childhood acute lymphoblastic leukemia (ALL) was investigated. A total of 77 childhood ALL samples were analyzed, 62 at initial presentation an...
the present study was conducted to investigate the effect of modified cloze procedure on writing proficiency of iranian intermediate efl learners. to fulfill the purpose of the study, 110 participants studying at semnan university majoring in english literature were tested on celt proficiency test. 65 participants who were found to be homogenous were selected and assigned randomly to two groups...
the present study was conducted to investigate the effect of modified cloze procedure on writing proficiencyof iranian intermediate efl learners. to fulfill the purpose of the study, 110 participantsstudying at semnan university majoring in english literature were tested on celt proficiency test.65 participants who were found to be homogenous were selected and assigned randomly to twogroups of ...
A wide pulse pressure (PP) is a marker of increased artery stiffness and high cardiovascular (CV) risk. To investigate the prognostic value of ambulatory PP, which is currently unknown, we studied 2010 initially untreated subjects with uncomplicated essential hypertension (mean age, 51.7 years; 52% men). All subjects underwent baseline procedures including 24-hour noninvasive ambulatory blood p...
A completion of an m-by-n matrix A with entries in {0, 1, ∗} is obtained by setting all ∗-entries to constants 0 or 1. A system of semi-linear equations over GF2 has the form Mx = f(x), where M is a completion of A and f : {0, 1}n → {0, 1}m is an operator, the ith coordinate of which can only depend on variables corresponding to ∗-entries in the ith row of A. We conjecture that no such system c...
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