Results 71 to 80 of about 2,003,362 (204)

Evaluating key predictors of breast cancer through survival: a comparison of AFT frailty models with LASSO, ridge, and elastic net regularization

BMC Cancer
Background Frailty models are extensively utilized in survival analysis to address unobserved heterogeneity among individuals. However, selecting the most robust model for survival prediction, especially in the context of high-dimensional data, continues
Senyefia Bosson-Amedenu, Emmanuel Ayitey, Francis Ayiah-Mensah, Luyton Asare   +3 more
doaj   +1 more source

Covariate-stratified analysis of prostate cancer and competing risk mortality in Ghana: A bootstrapped survival analysis approach

Scientific African
Prostate cancer remains a major health concern in sub-Saharan Africa, where late-stage presentation and comorbidities complicate survival estimation and treatment planning.
Senyefia Bosson-Amedenu, Anthony Joe Turkson, Emmanuel Ayitey, Emmanuel Mensah Baah, Francis Ayiah-Mensah, John Awuah Addor   +5 more
doaj   +1 more source

Bromazolam Tablet Quantification and Analysis of Post‐Mortem Cases From the National Programme on Substance Use Mortality (NPSUM)

Drug Testing and Analysis, Volume 18, Issue 4, Page 543-551, April 2026.
Tablets submitted to drug checking services that were found to contain bromazolam. Over half of these counterfeit tablets mimicked the appearance of licensed formulations (e.g., alprazolam Xanax bars and diazepam Roche 10 mg pills). Bromazolam is now the most commonly detected street benzodiazepine in drug poisoning deaths in the United Kingdom ...
Matthew Gardner, Molly F. Millea, Sam Craft, Rachael Andrews, Jennifer Scott, Stephen M. Husbands, Christopher R. Pudney, Oliver B. Sutcliffe, Caroline S. Copeland, Peter Sunderland   +9 more
wiley   +1 more source

THE ROLE AND SIGNIFICANCE OF THE CREDIBILITY THEORY IN ACTUARIAL PRACTICE

Pravo, 2014
Actuarial science is based on the use of financial and statistical models and depends on the practical framework, starting from the operation of the insurance market through the accounting system and the available data.
Nataša Papić Blagojević, Nenad Stefanović   +1 more
doaj  

Construction of Mortality Rate Using Heligman Pollard Model [PDF]

ITM Web of Conferences
The idea of constructing a mortality table lies in reflecting the mortality changes of the member of the study population. This study proposed a construction of the mortality table for male and female participants using the Heligman Pollard model and was
Sari Kurnia Novita, Arfan Nuraziza, Dzakiya Azizah, Rusli Jesslyn Gracsella   +3 more
doaj   +1 more source

The Dollar's Double Life: Not All Dollar Appreciations Are Born Equal for the Cross‐Currency Basis

Journal of Futures Markets, Volume 46, Issue 4, Page 754-772, April 2026.
ABSTRACT This paper revisits the relationship between the US dollar and cross‐currency basis (XCB) swap spreads. We show that the strength and direction of this relationship depend on the prevailing regime of the broad dollar. The evidence suggests that the well‐documented “dollar appreciates, basis widens” result holds primarily when the dollar is in ...
Daniel Felix Ahelegbey, Oyakhilome Wallace Ibhagui, Florian Gerth   +2 more
wiley   +1 more source

Multivariate Tests for Comparing Lifetimes of Parallel Systems

Quality and Reliability Engineering International, Volume 42, Issue 3, Page 1159-1171, April 2026.
ABSTRACT Life testing of engineering systems with dependent components requires robust multivariate methods. Parametric approaches depend on restrictive assumptions, limiting their use in complex or unknown lifetime distribution settings. This study evaluates nonparametric methods for comparing parallel system lifetimes under minimal sample ...
Niladri Chakraborty, Ahmed Maged, Maxim Finkelstein   +2 more
wiley   +1 more source

Comparison Among Modified Continual Reassessment Methods with Different Dose Allocation Methods for Phase I Clinical Trials

Mathematics
The continual reassessment method (CRM) has been an essential Bayesian finding design in phase I clinical trials. It utilizes all the information in observed data which contributes to its essential operational characteristics.
Jiacheng Xiao, Weijia Zhang, Rong Li, Conghua Wen   +3 more
doaj   +1 more source

A State-Space Estimation of the Lee-Carter Mortality Model and Implications for Annuity Pricing

, 2015
In this article we investigate a state-space representation of the Lee-Carter model which is a benchmark stochastic mortality model for forecasting age-specific death rates.
Fung, Man Chung, Peters, Gareth W., Shevchenko, Pavel V.   +2 more
core   +1 more source

Financial Time Series Uncertainty: A Review of Probabilistic AI Applications

Journal of Economic Surveys, Volume 40, Issue 2, Page 915-953, April 2026.
ABSTRACT Probabilistic machine learning models offer a distinct advantage over traditional deterministic approaches by quantifying both epistemic uncertainty (stemming from limited data or model knowledge) and aleatoric uncertainty (due to inherent randomness in the data), along with full distributional forecasts.
Sivert Eggen, Tord Johan Espe, Kristoffer Grude, Morten Risstad, Rickard Sandberg   +4 more
wiley   +1 more source