What is the better statistical distribution for modeling survival times?

More Daniele Porcheddu's questions See All

What commercial software would you suggest for conducting an experiment based on the method of constant stimuli?

With which software can I conduct an experiment based on the psychophysical method of constant stimuli?

10 November 2018 2,000 3 View

Is there a non-parametric alternative for a two-way between subjects ANOVA?

Is there an equivalent to Kruskal Wallis one-way test for a two-way model?

09 October 2018 8,384 6 View

How can I prepare virus for a TEM or SEM imaging?

I have virus (viral hemorrhagic septicemia virus) in suspension and the experiment will not involve cells. What level of TCID50 is preferred?

11 August 2024 3,115 1 View

Handling Missing Data and Building a Predictive Model with Incomplete Information ?

I am developing a predictive model for a water supply network that involves 20 influencing points. However, I only have historical data for 10 out of these 20 points. I would like to know how to...

10 August 2024 4,005 2 View

Is it possible to use the Fused Deposition Modeling (FDM) to additively manufacture interconnected porous structure generation of >100-200 micrometer?

Usually, additive manufacturing techniques like SEBM, SLS, and SLM are used for interconnected porous lattice structure generation with sizes of >100–200 micrometers. Can the Fused Deposition...

09 August 2024 7,892 0 View

How to define an anisotropic material with asymmetric elastic compliance/stiffness matrix in ANSYS APDL?

I need to model an anisotropic material in which the Poisson's ratio ν_12 ≠ ν_21 and so on. Therefore, the elastic compliance matrix wouldn't be a symmetric one. In ANSYS APDL, for TB,ANEL...

09 August 2024 5,048 2 View

How can I apply boundary conditions in an orthotropic steel deck numerical model using ABAQUS software?

I am trying to simulate vehicular loading on an orthotopic steel deck bridge section in ABAQUS software. The red arrow mark in the attached figure indicates the direction in which the vehicle will...

08 August 2024 719 0 View

How to normalize and take the significance of the MTT OD values with 3 replicates for the same cell-line?

Hi, I have a question about normalizing the MTT OD values for doing the statistical analysis. So, if we have 3 different plates and we call them 3 different replicates, so, first we would...

07 August 2024 8,106 4 View

Can you suggest reliable sources defining "3D mesh" and "3D city models"?

Dear fellow researchers, I am currently working on a paper where I need to provide a reliable reference that defines and distinguishes between 3D mesh models and 3D city models. Although I am...

06 August 2024 9,986 2 View

Please explain how the plastic input value should be considered from the true stress-strain curve for the bilinear elastoplastic material model ?

I am working on Abaqus/Explicit(Quasistatic ) for the deformation of the auxetic structure model. Please explain how the plastic input value should be considered from the true stress-strain curve...

05 August 2024 454 3 View

"A Markov-like Model for Patient Progression"?

A Markov-like Model for Patient Progression" Markov Chain Monte Carlo (MCMC) Markov Chain Monte Carlo (MCMC) is a powerful computational technique used to draw samples from a probability...

05 August 2024 10,079 0 View

If we are using snowball sampling technique, how do we justify the true representativeness of the sample statistically? is there any statistical test?

Are there any statistical methods to justify your sampling technique using SPSS or AMOS?

05 August 2024 9,153 4 View

Çağatay Çetinkaya

Dear Prof. Daniele Porcheddu The exponential, Weibull, Gamma, Log-likelihood, Pareto, Logistic distribution etc. These are the most known probability distribution for modelling survival times. Which of these distribution fits your data best, you can use it. For specific cases (such as censoring, finite ranges (e.g. 0

Ajit kumar Roy

The referred link ,I think will be useful

https://data.princeton.edu/wws509/notes/c7.pdf

Hazim Al Dilaimy

Following answers.

Wayne Fischer

Daniele, are you saying that the survival rate is constant, or that the hazard rate is constant, or that the hazard ratio is constant?

Daniele Porcheddu

Dear prof. Wayne Fischer , indeed I meant a case in which the survival rate is constant. Thank you for your attention. Daniele

If the survival rate is constant, the survival plot would be a straight line (slope = survival rate = a constant) - right? So, the non-parametric Kaplan-Meier model will work (as in "Keep It Simple").