نتایج جستجو برای: modified log rank test
تعداد نتایج: 1157753 فیلتر نتایج به سال:
When analyzing right-censored survival data, equality of survival curves across treatment groups is often tested using log rank tests (Peto and Peto 1972), aka Mantel-Haenszel tests. For instance, in a cancer trial, the primary response variable might be time to disease progression and the treatment groups might be chemotherapy regimens. To increase power and protect against baseline imbalances...
We describe factors determining retention and survival among HIV-infected children and adolescents engaged in two health care delivery models in Kampala, Uganda: one is a community home-based care (CHBC) and the other is a facility-based family-centred approach (FBFCA). This retrospective cohort study reviewed records from children aged from 0 to 18 years engaged in the two models from 2003 to ...
OBJECTIVE Patients with recurrent triple-negative breast cancer (TNBC) currently have no established treatment option other than chemotherapy. However, long-term chemotherapy is often difficult due to adverse effects. A previous study documented a 10%-30% response rate of progestins in oestrogen receptor-negative breast cancer. The aim of this study was to investigate the effect of medroxyproge...
لنگش از بیماری های مهم و سبب ضررهای اقتصادی و نیز دلیل اختلال در آسایش در گله های گاو شیری است. لنگش سبب تغییر رفتار طبیعی حیوان شده و بر این اساس اسکورهای مختلف حرکتی برای تشخیص آن به وجود آمده است از جمله manson & leaver ، sprecher و cook. دراین مطالعه، گاوداری صنعتی با 1300 راس گاو دوشا در منطقه شهرکرد انتخاب و در فواصل 3 ماهه(شهریور، آذر و اسفند) در این گاوداری به 300 راس گاوی که به صورت تص...
Methods All HIV1-positive patients of the participating clinic wards, aged over 13 and giving informed consent are included in the cohort. Patients receiving a first prescription of NVP between 1997 and 2008 are described at baseline and during follow-up according to their treatment status, ART-naïve or not. Chi-square test, signed rank Wilcoxon test, Mc Nemar test and log-rank test are used fo...
Overexpression of Id-1 protein is a marker for unfavorable prognosis in early-stage cervical cancer.
Inhibitor of differentiation/DNA binding (Id) proteins are transcription factors, involved in cell cycle regulation and neoangiogenesis. Using immunohistochemistry, we investigated the prognostic influence of Id-1, Id-2, and Id-3 expression in 89 patients with cervical cancer stage pT(1b). In univariate and multivariate analysis, patients with strong or moderate expression of Id-1 had a signifi...
BACKGROUND Although low magnesium levels have been associated with an increased mortality in dialysis patients, they are kept low by routinely-used dialysates containing 0.50 mmol/L magnesium. Thus, we investigated the impact of a higher dialysate magnesium concentration on mortality. METHODS 25 patients on high dialysate magnesium (HDM) of 0.75 mmol/L were 1:2 matched to 50 patients on low d...
PURPOSE The aim of this study was to determine whether stratification of deceased donors by the United Network for Organ Sharing (UNOS) criteria negatively impacts graft survival. MATERIALS AND METHODS We retrospectively reviewed deceased donor and recipient pretransplant variables of kidney transplantations that occurred between February 1995 and December 2009. We compared clinical outcomes ...
BACKGROUND The purpose of this study was to investigate the impact of the modified Glasgow Prognostic Score (GPS) at the time of recurrence on post-recurrence survival (PRS) in non-small cell lung cancer (NSCLC) patients after surgical resection. MATERIAL AND METHODS The clinicopathologic characteristics and outcome data of 266 patients with recurrent NSCLC were collected and reviewed retrospec...
Hypoxia-inducible factor 1alpha (HIF-1alpha) is a transcriptional factor that regulates genes involved in response to hypoxia and promotes neoangiogenesis, which are considered essential for tumor growth and progression. Using immunohistochemistry, we investigated the influence of HIF-1alpha expression on prognosis in 91 patients with cervical cancer stage pT1b. In univariate and multivariate a...
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