Survapp: A Shiny Application for Survival Data Analysis

There is a substantial demand for user-friendly graphical interfaces that empower professionals with limited programming knowledge to perform statistical analysis. Although R software is widely used for statistical analysis, it lacks an adequately intuitive graphical interface for individuals without statistical and programming skills. This paper aims to address this gap by introducing an application called Survapp, enabling users, regardless of their computational knowledge, to conduct survi...

Estimation of the Transition Probabilities Conditional on Covariates with Repeated Measures: a Joint Modeling Approach

In recent years, there has been a significant urge of interest in longitudinal and survival data modeling. This approach holds particular significance in cancer research, where it enables the evaluation of how longitudinal markers influence the event of interest. This paper aims to introduce practical estimation techniques for transition probabilities, conditional on observed covariates with repeated measurements. This innovation allows us to incorporate the trajectory of longitudinal outcome...

Presmoothed Estimators of the State Occupation Probabilities in Multi-state Survival Data

The progress of a disease can be analyzed using multistate models. These models focus on two key parameters of interest: the transition hazard and the state occupation probabilities. The state occupation probabilities have been consistently estimated by the Aalen-Johansen estimator. This estimator is particularly well-suited for handling censoring and benefits from the Markov assumption in the underlying stochastic process. In some cases, these estimators may lead to estimators with higher va...

Promoting Nutrition Literacy and Food Neophilia of Middle School Children Through a Serious Hybrid Game

This paper aims to assess the impact of a serious hybrid game on nutrition literacy and the promotion of food neophilia and, consequently, the diversification of children’s food choices from 10 to 12 years old. FlavourGame is a serious hybrid game that combines a digital component (based on a mobile application, which helps players during the game, acting as an assistant that guides the game’s tasks) with a board game. Real foods with their flavors, aromas, and textures were introduced as pro...