Questions in topic: "cox"
https://developer.ibm.com/answers/questions/topics/single/357258.html
The latest questions for the topic "cox"SPSS Coxreg procedure
https://developer.ibm.com/answers/questions/520980/spss-coxreg-procedure.html
I am running a coxreg procedure in SPSS with an interaction term. I cannot find the OR for the variables included in the interaction. please help.spssinteractioncoxSun, 27 Oct 2019 11:49:43 GMTNFBSregression diagnostics in time-dependent Cox
https://developer.ibm.com/answers/questions/499567/regression-diagnostics-in-time-dependent-cox.html
Hi
I wanted to know what regression diagnostics can I test for in SPSS when I have a model with a time-dependent covariate, one categorical and two continuous variables. Any suggestions? If you could point me towards where I can find it/the syntax, that would also help. For example, my current syntax for this multivariable model is -
TIME PROGRAM.
COMPUTE T_COV_ = T_>=var1*1.
COXREG outcome_time
/STATUS=outcome(1)
/STRATA=var2
/CONTRAST (var3)=Simple(1)
/METHOD=ENTER T_COV_var3 var4 var5
/PRINT=CI(95) CORR
/CRITERIA=PIN(.05) POUT(.10) ITERATE(20).
Thanks in advance!regressiondiagnosticscoxMon, 01 Apr 2019 18:47:02 GMTdrhkulkarniInterpretation Cox Regression
https://developer.ibm.com/answers/questions/494607/interpretation-cox-regression.html
Hey all!
I'm having a hard time interpreting a significant result from a cox regression I've done. I'm researching whether people who live in a low income area or not differ in their churn behaviour (whether they cancel their subscription sooner or later) for a subscription based service. As seen in the table below, the only significant result is for people who live in an area in which 0 to 20 percent of the people have a low income. But seeing as there is no hazard ratio to accompany it, how should I interpret this result?
![alt text][1]
Thanks in advance!
[1]: /answers/storage/temp/26937-screenshot-2019-02-26-at-113841.pngspssstatisticschartcoxTue, 26 Feb 2019 10:49:37 GMTBorisJorisCox regression separate lines cumulative event/survival rate
https://developer.ibm.com/answers/questions/468630/cox-regression-separate-lines-cumulative-eventsurv.html
I have a quick question about Cox regression with SPSS. SPSS enables me to define a categorical covariate, and have SPSS draw separate event or survival curves for the chosen categorical variable. Is it possible to obtain the estimated cumulative event or survival rate? Like a survival table for a simple Kaplan-Meier analysis.
I hope someone can help me, your help is much appreciated.
Thank you
StewiespsscoxsurvivalcumulativerateTue, 04 Sep 2018 20:04:24 GMTstewiegriffinmissing values in Cox regression
https://developer.ibm.com/answers/questions/465373/missing-values-in-cox-regression.html
Hello everyone. I am working (SPSS v23) on a dataset with 21 248 patients, doing cox regression. As far as I can see I have no missing values for any of my variables. But when I do cox reg, in the "case processing summary", I find out that 182 cases are dropped due to missing values. How can this be??
Please help me.
OCRcoxSat, 18 Aug 2018 20:29:57 GMTOle-Christian RutherfordBeta-coefficients for risk factors in Cox Regression
https://developer.ibm.com/answers/questions/462768/beta-coefficients-for-risk-factors-in-cox-regressi.html
I am very new to using SPSS program. I also have very little background in stats so ANY help would be greatly appreciated!
I would like to run the cox regression program on this dataset. I have an end event. I also have multiple risk factors. I would like to obtain the beta-coefficient for each of the risk factors. Specifically, two of the risk factors are systolic blood pressure and taking blood pressure medication or not. I want to be able to specifically obtain the beta-coefficient for systolic blood pressure with medication and systolic blood pressure without medication ALONG while taking the rest of the risk factors into account in SPSS. Is there a way to do this? Any help would be amazing!
Thank you!spssregressionbetacoxtwo-factorfactorFri, 03 Aug 2018 20:43:51 GMTilovexmentime varying coefficients in Cox models
https://developer.ibm.com/answers/questions/458488/time-varying-coefficients-in-cox-models.html
I'm trying to create a Cox survival model where the coefficients of the model vary with time (not time varying or time dependent factors). I have 10 patients and 3 die in days 7, 8, and 9, respectively, and the other 7 are censored at day 10, so, I have 94 patient rows (7 for patient 1, 8 for patient 2, etc.), with 3 rows having status = dead and the other 91 having status = alive (column = status). Each row is labeled with the appropriate day (column = day of followup). Using the drop down menu, Survival/Cox regression, I put 'status' column in the Status box and 'day of followup' column into the Time box. I then enter Factors A & B into the Block. What do I use for time? Do I create a duplicate of 'day of followup' column? Or is time something else? Do I enter this time column by itself in addition to its interactions with Factors A & B (Factor A * time, Factor B * time)? Or do I just enter the Factor * time terms? Is there anything else I need to do?
Thank you,timecoxSun, 15 Jul 2018 00:26:36 GMTrags437Cox Regression Analysis - Concern for Overfitting
https://developer.ibm.com/answers/questions/434201/cox-regression-analysis-concern-for-overfitting.html
Hello all,
I am currently running a survival analysis with a Cox-regression model. Unfortunately, the event we are studying is a relatively uncommon (only ~30 events) and we initially were hoping to include 5 variables in the regression. The questions I have were any suggestions to avoid overfitting the model.
1. Is there a way to test the calibration of the model (to see if predicted and observed survival times agree
reasonably in bootstrapping)?
2. We were possibly looking at Ridge regression as an alternative to help us assess this as well, but I am having trouble finding it for SPSS?
Thanks!coxWed, 28 Feb 2018 21:05:09 GMTmusica1325Is it possible to use AIC selection criteria in Cox regression in SPSS?
https://developer.ibm.com/answers/questions/428182/is-it-possible-to-use-aic-selection-criteria-in-co.html
I would like to apply Cox regression for survival analysis - there are a few predictors in the model and multicollinearities. I was thinking that using AIC selection criteria would be the most sensible next steps to proceed to build a model that takes this into account. However, I don't see the option of incorporating AIC in Cox regression in the drop down menu in SPSS. Is there another way to get around this?
Thank you.statisticsregressioncoxselectioncriteriaWed, 31 Jan 2018 16:53:11 GMTlostlingSurvival analysis
https://developer.ibm.com/answers/questions/410316/survival-analysis.html
I have two questions:
1. Is it possible to correct/adjust the p-value for multiple comparisons in Cox regression analysis?
2. In Kaplan-Meier survival analysis using the pairwise over strata option, is the resultant p-value the true p-value or is it adjusted by some method such as, Benjamini-Hochberg or Bonferroni ?
ThankscoxkaplanmeiersurvivalWed, 01 Nov 2017 11:27:44 GMTakkinaraHow to perform multiple separate univariate (not multivariate) cox regression analyses at once?
https://developer.ibm.com/answers/questions/393678/how-to-perform-multiple-separate-univariate-not-mu.html
I am using SPSS IBM Statistics version 23 on Mac. I can use the
survival, cox-regression and multivariable analysis by selecting for
example 10 different variables/covariates. However, I also would like
to perform an exploratory univariate cox regression survival analysis
for the 10 different variables separately. I can do this by using the
same function as mentioned above for multivariable analysis with the
difference that in this case I only select one covariate. I am know
looking for a possibility to perform multiple -for example 100-
separate cox regression analyses for different variables separately
without each time clicking through the entire process as mentioned for
univariate cox regression analysis. Is there a possibility to do this?
From presentations of other groups I know that there must be a
opportunity.spssstatisticsmodelercoxMon, 14 Aug 2017 12:54:43 GMTspssstudentRepeated measures for"cox regression in SPSS Modeler
https://developer.ibm.com/answers/questions/365505/repeated-measures-forcox-regression-in-spss-modele.html
From work in mixed effect models and generalized estimation equations, it is important to correct for bias resulting from collecting multiple samples from the same subjects over time. In a Cox proportional hazards model for survival, it is not clear if/how it corrects for the bias resulting from the collection of longitudinal data.
Does a Cox Model in IBM SPSS Modeler do correct for subject bias due to repeated measurements? What does it need to?
The direct question is: IBM SPSS Modeler Cox Model accepts and handles repeated measures?spssstatisticsmodelercoxTue, 28 Mar 2017 16:14:04 GMTAndresRomeroUnderstanding Cox node
https://developer.ibm.com/answers/questions/357259/understanding-cox-node.html
I would like to understand the output of COX NODE Like “$C-Status.Code-1”, “$CP-Status.Code-1” ,” $CP-0-1” ,” $CP-1-1” . How to read these 4 columns and understand it. What I am looking for is that length of a “time” field along with their probability scores.
My input time variable is in months.
For example : If I say predicted value for a Client 1 is 0.78 with the time period value 11. This means that there is a 78% of chance that “client 1” can leave in 11 months. This is what I expect in the output. But I could see four columns in output and have no idea to understand it.modelernodecoxThu, 16 Feb 2017 22:14:52 GMTshammes