scholarly journals Survival trees based on heterogeneity in time‐to‐event and censoring distributions using parameter instability test

2021 ◽  
Author(s):  
Madan Gopal Kundu ◽  
Samiran Ghosh
Keyword(s):  
Time To Event ◽  
Parameter Instability ◽  
Survival Trees

scholarly journals Multistate recursively imputed survival trees for time-to-event data analysis: an application to AIDS and mortality post-HIV infection data

2018 ◽  
Vol 18 (1) ◽  
Author(s):  
Leili Tapak ◽  
Michael R. Kosorok ◽  
Majid Sadeghifar ◽  
Omid Hamidi
Keyword(s):  
Data Analysis ◽  
Hiv Infection ◽  
Event Data ◽  
Time To Event ◽  
Survival Trees ◽  
Time To Event Data ◽  
Event Data Analysis

Intensity and direction dimensions of competitive state anxiety: Relationship to performance through the time-to-event paradigm

2003 ◽  
Author(s):  
Nektarios A. Stavrou ◽  
Maria Psychountaki ◽  
Yannis Zervas
Keyword(s):  
State Anxiety ◽  
Time To Event

Bayesian Frailty Model for Time to Event Breast Cancer Data

2011 ◽  
Vol 4 (2) ◽  
pp. 8-12
Author(s):  
Leo Alexander T Leo Alexander T ◽  
◽  
Pari Dayal L Pari Dayal L ◽  
Valarmathi S Valarmathi S ◽  
Ponnuraja C Ponnuraja C ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Frailty Model ◽  
Breast Cancer Data ◽  
Time To Event ◽  
Cancer Data

The relationship between output growth and unemployment in the Philippines economy (1990-2014):

2017 ◽  
Vol 5 (1) ◽  
pp. 49
Author(s):  
Marlon A. Mojica ◽  
Virgilio M. Tatlonghari
Keyword(s):  
Labor Force ◽  
Structural Break ◽  
Empirical Relationship ◽  
Trade Openness ◽  
Negative Relationship ◽  
Participation Rate ◽  
The Philippines ◽  
Output Growth ◽  
Recursive Least Squares ◽  
Parameter Instability

This paper examines the empirical relationship between unemployment and real output in the Philippines utilizing quarterly data from the Labor Force Survey by the Philippine Statistics Authority for the period from 1990-2014. The study employed three variants of Okun’s Law – the “gap” approach, the “first difference” approach, and a dynamic approach.   Findings show that the Okun’s coefficients based on the gap approach are consistent with the theoretical expectation of a negative relationship.  In the ARDL model, labor force participation rate and trade openness were found to be significantly related to unemployment. The result of dummy variable test revealed the presence of structural break following the re-definition of unemployment in the Philippines in 2005. Recursive least squares and rolling regressions show evidence of parameter instability in several sub-periods.

INTENSITY AND DIRECTION DIMENSIONS OF COMPETITIVE STATE ANXIETY: A TIME-TO-EVENT APPROACH

2006 ◽  
Vol 103 (5) ◽  
pp. 91 ◽  
Author(s):  
NEKTARIOS A. STAVROU
Keyword(s):  
State Anxiety ◽  
Time To Event

Development and validation of risk stratification models for adult spinal deformity surgery

2019 ◽  
Vol 31 (4) ◽  
pp. 587-599 ◽  
Author(s):  
Ferran Pellisé ◽  
Miquel Serra-Burriel ◽  
Justin S. Smith ◽  
Sleiman Haddad ◽  
Michael P. Kelly ◽  
...  
Keyword(s):  
Spinal Deformity ◽  
Adult Spinal Deformity ◽  
The United States ◽  
Adverse Outcomes ◽  
High Rate ◽  
Prognostic Models ◽  
Time To Event ◽  
European Continent ◽  
Event Risk ◽  
Risk Estimates

OBJECTIVEAdult spinal deformity (ASD) surgery has a high rate of major complications (MCs). Public information about adverse outcomes is currently limited to registry average estimates. The object of this study was to assess the incidence of adverse events after ASD surgery, and to develop and validate a prognostic tool for the time-to-event risk of MC, hospital readmission (RA), and unplanned reoperation (RO).METHODSTwo models per outcome, created with a random survival forest algorithm, were trained in an 80% random split and tested in the remaining 20%. Two independent prospective multicenter ASD databases, originating from the European continent and the United States, were queried, merged, and analyzed. ASD patients surgically treated by 57 surgeons at 23 sites in 5 countries in the period from 2008 to 2016 were included in the analysis.RESULTSThe final sample consisted of 1612 ASD patients: mean (standard deviation) age 56.7 (17.4) years, 76.6% women, 10.4 (4.3) fused vertebral levels, 55.1% of patients with pelvic fixation, 2047.9 observation-years. Kaplan-Meier estimates showed that 12.1% of patients had at least one MC at 10 days after surgery; 21.5%, at 90 days; and 36%, at 2 years. Discrimination, measured as the concordance statistic, was up to 71.7% (95% CI 68%–75%) in the development sample for the postoperative complications model. Surgical invasiveness, age, magnitude of deformity, and frailty were the strongest predictors of MCs. Individual cumulative risk estimates at 2 years ranged from 3.9% to 74.1% for MCs, from 3.17% to 44.2% for RAs, and from 2.67% to 51.9% for ROs.CONCLUSIONSThe creation of accurate prognostic models for the occurrence and timing of MCs, RAs, and ROs following ASD surgery is possible. The presented variability in patient risk profiles alongside the discrimination and calibration of the models highlights the potential benefits of obtaining time-to-event risk estimates for patients and clinicians.

Functional modeling of recurrent events on time‐to‐event processes

2021 ◽  
Author(s):  
Marta Spreafico ◽  
Francesca Ieva
Keyword(s):  
Recurrent Events ◽  
Functional Modeling ◽  
Time To Event

Study design synopsis: Survive the race – Time‐to‐event analysis

2021 ◽  
Author(s):  
Johann Detilleux
Keyword(s):  
Study Design ◽  
Event Analysis ◽  
Time To Event ◽  
Race Time
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