نتایج جستجو برای: log rank test
تعداد نتایج: 932838 فیلتر نتایج به سال:
The Wilcoxon signed rank test is a frequently used nonparametric test for paired data (e.g., consisting of pre- and posttreatment measurements) based on independent units of analysis. This test cannot be used for paired comparisons arising from clustered data (e.g., if paired comparisons are available for each of two eyes of an individual). To incorporate clustering, a generalization of the ran...
Introduction. Hepatocellular carcinoma (HCC) is the most common primary liver cancer in world and Indonesia. This study aimed to describe clinical presentation survival rate of HCC patients Dr. Cipto Mangunkusumo Hospital (RSCM) as Indonesian tertiary referral hospital year 2015-2021 Methods. Cohort was performed 2015-2021. Clinical presentations at time diagnosis were recorded from electronica...
We give algorithms for approximation by low-rank positive semidefinite (PSD) matrices. For symmetric input matrix A ∈ Rn×n, target rank k, and error parameter ε > 0, one algorithm finds with constant probability a PSD matrix Ỹ of rank k such that ‖A− Ỹ ‖2F ≤ (1+ε)‖A−Ak,+‖ 2 F , where Ak,+ denotes the best rank-k PSD approximation to A, and the norm is Frobenius. The algorithm takes time O(nnz(A...
durbin's rank test is widely used for testing treatment effects in balanced incomplete block designs (bibds)which have wide applications in sensory analysis. this test is failed for bibds when ties data occur. an adjusted version of durbin rank test for this kind of data is given to solve this problem. chi-square approximation, which is commonly used for this test, is not adequate for small bib...
We show that half-integral polytopes obtained as the convex hull of a random set of half-integral points of the 0/1 cube have rank as high as Ω(log n/ log log n) with positive probability — even if the size of the set relative to the total number of half-integral points of the cube tends to 0. The high rank is due to certain obstructions. We determine the exact threshold number, when these obst...
BACKGROUND The aim of this study was to evaluate whether genetic variations in the transforming growth factor-β (TGF-β) pathway influenced clinical outcome of advanced lung adenocarcinoma with epidermal growth factor receptor (EGFR) mutations treated with gefitinib. PATIENTS AND METHODS Two hundred six patients with advanced lung adenocarcinomas were enrolled in this study. EGFR mutation in t...
PURPOSE Xeroderma pigmentosum group D (XPD) codes for a DNA helicase involved in nucleotide excision repair that removes platinum-induced DNA damage. Genetic polymorphisms of XPD may affect DNA repair capacity and lead to individual differences in the outcome of patients after chemotherapy. This study aims to identify whether XPD polymorphisms affect clinical efficacy among advanced non-small c...
KRAS mutations are major factors involved in initiation and maintenance of pancreatic tumors. The impact of different mutations on patient survival has not been clearly defined. We screened tumors from 171 pancreatic cancer patients for mutations in KRAS and CDKN2A genes. Mutations in KRAS were detected in 134 tumors, with 131 in codon 12 and only 3 in codon 61. The GGT>GAT (G12D) was the most ...
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