Results 111 to 120 of about 402,477 (353)

A Goodness-of-Fit Test for Log-Linearity in Cox Proportional Hazards Model Under Monotonic Covariate Effects

Mathematics
The Cox proportional hazards (PH) model is widely used because it models the covariates to the hazard through a log-linear effect. However, exploring flexible effects becomes desirable within the Cox PH framework when only a monotonic relationship ...
Huan Chen, Chuan-Fa Tang
doaj   +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

High‐Efficacy Treatment in Neuromyelitis Optica Specturm Disorder Patients With Seropositive AQP4 Antibodies—A Real‐World Study

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To compare the effectiveness of high‐efficacy treatments (HET) and low‐efficacy treatments (LET) in NMOSD patients with anti‐aquaporin‐4 antibodies (AQP4‐ab). Methods In this multi‐center study, we analyzed 183 AQP4‐ab seropositive NMOSD patients who received immunosuppressive treatments (IST).
Xiang Li, Binbin Xue, Jia Li, Dewei Xie, Juyuan Pan, Lanbing Zhu, Qiaowen Tong, Jing Lin, Xu Zhang, Junhui Xia, Jie Lin   +10 more
wiley   +1 more source

Determinants of premature mortality in a city population: An eight-year observational study concerning subjects aged 18–64

International Journal of Occupational Medicine and Environmental Health, 2013
Background: Premature deaths constitute 31.1% of all deaths in Łódź. Analysis of the causes of premature deaths may be helpful in the evaluation of health risk factors. Moreover, findings of this study may enhance prophylactic measures.
Irena Maniecka-Bryła, Elżbieta Dziankowska-Zaborszczyk, Marek Bryła, Wojciech Drygas   +3 more
doaj   +1 more source

A Validated Model to Predict Severe Weight Loss in Amyotrophic Lateral Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Severe weight loss in amyotrophic lateral sclerosis (ALS) is common, multifactorial, and associated with shortened survival. Using longitudinal weight data from over 6000 patients with ALS across three cohorts, we built an accelerated failure time model to predict the risk of future severe (≥ 10%) weight loss using five single‐timepoint ...
David G. Lester, Kevin Talbot, Martin R. Turner, Alexander G. Thompson, the Pooled Resource Open‐Access ALS Clinical Trials Consortium   +4 more
wiley   +1 more source

The Duration of Trade Revisited: Continuous-Time vs. Discrete-Time Hazards [PDF]

The recent literature on the duration of trade has predominantly analyzed the determinants of trade flow durations using Cox proportional hazards models.
Hess, Wolfgang, Persson, Maria
core  

Early Intensive Versus Escalation Approach: Ten‐Year Impact on Disability in Relapsing Multiple Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To evaluate the long‐term impact of early intensive treatment (EIT) versus escalation (ESC) strategies using high‐efficacy disease‐modifying therapies (HE‐DMTs) on disability progression in relapsing multiple sclerosis (RMS). Methods This observational study included 4878 RMS patients from the Italian Multiple Sclerosis Register ...
Pietro Iaffaldano, Giuseppe Lucisano, Tommaso Guerra, Francesca Caputo, Marta Simone, Massimiliano Copetti, Damiano Paolicelli, Emilio Portaccio, Francesco Patti, Paola Perini, Vincenzo Brescia Morra, Alessia Di Sapio, Matilde Inglese, Carlo Pozzilli, Giacomo Lus, Giuseppe Salemi, Erica Curti, Giovanna De Luca, Paola Valentino, Eleonora Cocco, Paola Cavalla, Carlo Avolio, Alessandra Lugaresi, Antonio Gallo, Pietro Annovazzi, Maria A. Rocca, Clara Grazia Chisari, Massimo Filippi, Maria Pia Amato, Maria Trojano, on behalf of the Italian MS Register, Beatrice Biolzi, Daniele Dell’Anna, Daniele Di Giulio Cesare, Sonia Di Lemme, Chiara Di Tillio, Teresa Fonsdituri, Ilaria Maietta, Agata Marchese, Silvia Marinetto, Federica Martini, Cristiana Morano, Silvia Perugini, Giovanna Ramona Piredda, Chiara Raimondi, Ilaria Rossi, Valentina Tallarico, Stefania Treccarichi   +47 more
wiley   +1 more source

Analysis of time-to-event for observational studies: Guidance to the use of intensity models

, 2020
This paper provides guidance for researchers with some mathematical background on the conduct of time-to-event analysis in observational studies based on intensity (hazard) models.
Abrahamowicz, Michal, Andersen, Per Kragh, Cook, Richard J, Joly, Pierre, Martinussen, Torben, Perme, Maja Pohar, Taylor, Jeremy MG, Therneau, Terry M, van Houwelingen, Hans C   +8 more
core   +1 more source

Serum Neurofilament Light Chain in Multiple Sclerosis: Superiority of Age‐ and BMI‐Corrected Z Scores/Percentiles Over Absolute Cutoff Values for Prediction of Treatment Response

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Prognostication of disease course and prediction of treatment response in multiple sclerosis is an unmet need. We compared the performance of serum neurofilament light chain Z scores (age‐ and BMI‐adjusted) with absolute concentrations for the prediction of response to disease‐modifying therapy.
Maximilian Einsiedler, Aleksandra Maleska Maceski, Sofia Sandgren, Johanna Oechtering, Sabine Schaedelin, Lisa Hofer, Amar Zadic, Juan Francisco Vilchez Gomez, Lester Melie‐Garcia, Alessandro Cagol, Riccardo Galbusera, Sebastian Finkener, Patrice Lalive, Marjolaine Uginet, Stefanie Müller, Caroline Pot, Amandine Mathias, Renaud Du Pasquier, Robert Hoepner, Andrew Chan, Giulio Disanto, Chiara Zecca, Marcus D’Souza, Lars G. Hemkens, Tobias Derfuss, Özgür Yaldizli, Patrick Roth, Claudio Gobbi, David Brassat, Björn Tackenberg, Henrik Zetterberg, Tjalf Ziemssen, Heinz Wiendl, Klaus Berger, Marco Hermesdorf, Fredrik Piehl, Ludwig Kappos, Cristina Granziera, Ahmed Abdelhak, David Leppert, Eline A. J. Willemse, Pascal Benkert, Jens Kuhle, Swiss Multiple Sclerosis Cohort Study (SMSC)   +43 more
wiley   +1 more source

Are non-constant rates and non-proportional treatment effects accounted for in the design and analysis of randomised controlled trials? A review of current practice

BMC Medical Research Methodology, 2019
Background Most clinical trials with time-to-event primary outcomes are designed assuming constant event rates and proportional hazards over time. Non-constant event rates and non-proportional hazards are seen increasingly frequently in trials.
Kim Jachno, Stephane Heritier, Rory Wolfe   +2 more
doaj   +1 more source