نتایج جستجو برای: stratifi ed cox proportional hazards model

تعداد نتایج: 2242673  

Journal: :International Journal for Population Data Science 2023

ObjectivesA large proportion of those who die by suicide present to an Emergency Department (ED) with self-harm (SH) in the year before death. This study examines ‘does risk death following ED presentation SH vary according hospital attended?’
 MethodsThe Northern Ireland Self-Harm Registry provided data on presentations 12 departments NI between 2012-2019. Linkage health and mortality rec...

2016
Sharif A Sabe Nisarat Charoensri Marwa A Sabe Zoran Popovic WH Wilson Tang Scott Flamm Deborah Kwon

Methods We retrospectively evaluated 140 consecutive patients with NICM who underwent delayed hyperenhancement cardiac MRI between 2002 and 2009. A Cox proportional hazards model was used to evaluate the association between RVEF and the composite outcome of death, left ventricular assist device implantation, or heart transplantation. Predictors of RVEF were evaluated using a multivariable linea...

Journal: :iranian journal of cancer prevention 0
ma pourhoseingholi research center for gastroenterology and liver disease, shahid beheshti university of medical sciences, tehran, iran a pourhoseingholi research center for gastroenterology and liver disease, shahid beheshti university of medical sciences, tehran, iran m vahedi research center for gastroenterology and liver disease, shahid beheshti university of medical sciences, tehran, iran b moghimi dehkordi research center for gastroenterology and liver disease, shahid beheshti university of medical sciences, tehran, iran a safaee research center for gastroenterology and liver disease, shahid beheshti university of medical sciences, tehran, iran s ashtari research center for gastroenterology and liver disease, shahid beheshti university of medical sciences, tehran, iran

background: although the cox proportional hazard regression is the most popular model for analyzing the prognostic factors on survival of cancer patients, under certain circumstances, parametric models estimate the parameter more efficiently than the cox model.  the aim of this study was to compare the cox regression model  with parametric models in patients with gastric cancer who registered a...

2017
Alexander J. Schupper Brian R. Hirshman Kate T. Carroll Mir Amaan Ali Clark C. Chen Alexander J Schupper Brian R Hirshman

Introduction: We wished to compare the survival benefit associated with gross total resection (GTR) in World Health Organization (WHO) grade II astrocytomas (A2) to those of grade III (A3) and grade IV (glioblastoma) astrocytomas. Methods: Using the Surveillance, Epidemiology, and End Results (SEER) Program (1999-2010) database, we identified 4,113 A2 patients. Surgical resection was defined as...

2003
DANIEL SCHUNK

Survival models for life-time data and other time-to-event data are widely used in many fields, including medicine, the environmental sciences, engineering etc., but they have still found less recognition in economics, however they are very helpful in the analysis of economic duration data. This paper provides a reanalysis of the Pennsylvania Reemployment Bonus Experiments, which were conducted...

Journal: :Academic emergency medicine : official journal of the Society for Academic Emergency Medicine 2007
Ru Ding Julianna J Jung Thomas D Kirsch Frederick Levy Melissa L McCarthy

OBJECTIVES To compare the patient characteristics, clinical conditions, and short-term recidivism rates of emergency department (ED) patients who leave against medical advice (AMA) with those who leave without being seen (LWBS) or complete their ED care. METHODS All eligible patients who visited the ED between July 1, 2004, and June 30, 2005 (N = 31,252) were classified into one of four group...

ژورنال: اندیشه آماری 2021

The proportional hazard Cox regression models play a key role in analyzing censored survival data. We use penalized methods in high dimensional scenarios to achieve more efficient models. This article reviews the penalized Cox regression for some frequently used penalty functions. Analysis of medical data namely ”mgus2” confirms the penalized Cox regression performs better than the cox regressi...

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