Tagged Questions

1
vote
0answers
18 views

Survival analysis in SAS-is there a way to include a random effect with interval censored data?

I'm trying to use some form of survival analysis (e.g. accelerated failure time or proportional hazards) to study seed germination time. My data is interval censored (also called "grouped-time") and ...
5
votes
1answer
332 views

EM algorithm R code on Cox PH model with frailty

Let say I have a 'kidney catheter' data set. Data are about the recurrence times to infection, at the point of insertion of the catheter, for kidney patients using portable dialysis equipment. ...
1
vote
0answers
148 views

How to generate predicted survivor curves from frailty models (using R coxph)?

I want to compute predicted survivor function for a Cox proportional hazards model with frailty terms [using survival package]. It appears that when frailty terms are in the model, the predicted ...
0
votes
0answers
56 views

Is my Bayesian survival model correct and why does it take so much time to run?

I am a master student of biostatistics and am currently working on my thesis. I have written a semi-parametric accelerate failure time model for censored recurrent event data. The statistical ...
6
votes
1answer
729 views

Which model should I use for Cox proportional hazards with paired data?

I am hoping someone can help me with which model (frailty, strata or cluster) I should use for my data. I have paired data so I need to take that into account when modelling the Cox PH and am unsure ...
3
votes
2answers
110 views

How should I analyze data on birth intervals of women?

I have data on birth intervals of women. Birth interval refers to the time interval from one child's birth date until the next child's birth date. Here, dependent variable is the birth interval, ...
7
votes
1answer
474 views

Any ideas about how to analyze survival data with pseudo-replication (dependent data)?

I am a student, working with a team on a large-scale ecological experiment. We want to analyze survival data which has been derived from an experimental design with some pseudo-replication. This ...
3
votes
2answers
3k views

How to conduct conditional Cox regression for matched case-control study?

I am attempting to find a program that will let me conduct Cox regression on my matched case-control dataset. Please assist. p.s. I have STATA, SPSS, and MedCalc