Results 61 to 70 of about 672,920 (300)

Using weibull mixture distributions to model heterogeneous survival data [PDF]

, 2003
In this article we use Bayesian methods to fit a Weibull mixture model with an unknown number of components to possibly right censored survival data. This is done using the recently developed, birth-death MCMC algorithm.
Marín Díazaraque, Juan Miguel, Rodríguez Bernal, María Teresa, Wiper, Michael Peter   +2 more
core   +1 more source

Estimating optimal step-function approximations to instantaneous hazard rates

Bernoulli, 2007
We investigate the problem of estimating the best binary decision tree approximation to the baseline hazard function in the Cox proportional hazards model. Our motivation is to find an effective way of condensing key functional information in the baseline hazard into a small number of estimable parameters.
Banerjee, Moulinath, McKeague, Ian W.
openaire   +2 more sources

Parent‐to‐Child Information Disclosure in Pediatric Oncology

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Despite professional consensus regarding the importance of open communication with pediatric cancer patients about their disease, actual practice patterns of disclosure are understudied. Extant literature suggests a significant proportion of children are not told about their diagnosis/prognosis, which is purported to negatively ...
Rachel A. Kentor, Flora Hoodin, Michelle Byrd, Kristin A. Kullgren, Leah LaLonde, Lauren Benkoske, Patrick Smith, Dawn Carson, Karen MacDonald, Susumu Inoue, Brenda Kitchen, Kate Gowans, Gregory A. Yanik   +12 more
wiley   +1 more source

A Flexible Link Function for Discrete-Time Duration Models [PDF]

, 2014
This paper proposes a discrete-time hazard regression approach based on the relation between hazard rate models and excess over threshold models, which are frequently encountered in extreme value modelling.
Gertheiss, Jan, Hess, Wolfgang, Tutz, Gerhard   +2 more
core   +1 more source

Radiotherapy Delivery in Deep Inspiration for Pediatric Patients—Final Results of the Phase II Feasibility Study TEDDI

Pediatric Blood &Cancer, EarlyView.
Abstract Introduction The TEDDI trial tested the feasibility and reproducibility of deep‐inspiration breath‐hold (DIBH) in pediatric patients referred for radiotherapy. This report presents final results, including patient‐reported outcomes (PRO) and dosimetric comparison of DIBH and free‐breathing (FB).
Daniella Elisabet Østergaard, Anni Young Lundgaard, Laura Ann Rechner, Danijela Dejanovic, Hanne Krogh Rose, Jolanta Hansen, Leila Vaalavirta, Miia Mokka, Marianne Aznar, Peder Skov Wehner, Lisa Lyngsie Hjalgrim, Maja Vestmø Maraldo   +11 more
wiley   +1 more source

A flexible model for bounded data with bathtub shaped hazard rate function and applications

AIMS Mathematics
The unit new X-Lindley distribution, which is a novel one-parameter distribution on the unit interval, is presented in this study. It was developed by altering the new X-Lindley distribution using the exponential transformation.
M. R. Irshad, S. Aswathy, R. Maya, Amer I. Al-Omari , Ghadah Alomani   +4 more
doaj   +1 more source

A Multivariate Definition for Increasing Hazard Rate Distribution Functions

The Annals of Mathematical Statistics, 1970
2. Multivariate IHR Distributions. Consider the randoih vector (X,, X2, , Xj) with distribution function F(xI, x2, , xn) = P[X1 xl, ..* X, > xn j X1 > xI', * * X,, > xn'] is nondecreasing in x1', * * , xn' for every choice of xI, * * x n. This generalises some notions of dependence that were studied by Lehmann [4] and Esary and Proschan [3].
openaire   +3 more sources

Predicting Chronicity in Children and Adolescents With Newly Diagnosed Immune Thrombocytopenia at the Timepoint of Diagnosis Using Machine Learning‐Based Approaches

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Objectives To identify predictors of chronic ITP (cITP) and to develop a model based on several machine learning (ML) methods to estimate the individual risk of chronicity at the timepoint of diagnosis. Methods We analyzed a longitudinal cohort of 944 children enrolled in the Intercontinental Cooperative immune thrombocytopenia (ITP) Study ...
Severin Kasser, Alice Bizeul, Meera Chitlur, Hugo Donato, Jelena Roganovic, Julia E. Vogt, Thomas Kühne   +6 more
wiley   +1 more source

Chen-Burr XII Model as a Competing Risks Model with Applications to Real-Life Data Sets

Axioms
In this paper Chen-Burr XII distribution is constructed and graphical description of the probability density function, hazard rate and reversed hazard rate functions of the proposed model is obtained.
Zakiah I. Kalantan, Sulafah M. S. Binhimd, Heba N. Salem, Gannat R. AL-Dayian, Abeer A. EL-Helbawy, Mervat K. Abd Elaal   +5 more
doaj   +1 more source

A Systematic Review of Evidence on the Clinical Effectiveness of Surveillance Imaging in Children With Medulloblastoma and Ependymoma

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Surveillance imaging aims to detect tumour relapse before symptoms develop, but it's unclear whether earlier detection of relapse leads to better outcomes in children and young people (CYP) with medulloblastoma and ependymoma. This systematic review aims to identify relevant literature to determine the efficacy of surveillance magnetic ...
Lucy Shepherd, Melissa Taylor, Helen Fulbright, Bob Phillips   +3 more
wiley   +1 more source