Comparing the predictive powers of survival models using harrells. However, the logic behind margins is that if you do not specify the predict option, margins will assume the default prediction for your model. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Statistics postestimation predictions, residuals, etc.
The following postestimation command is of special interest after streg. The postestimation commands in spost are named mtable, mchange, mgen, and mlincom. Survival models can be fitted on the log cumulative hazard scale, the log cumulative odds scale, the standard normal deviate probit scale, or on a scale defined by the value of theta using the arandaordaz family of. A comprehensive set of postestimation measures to enrich interrupted timeseries analysis. Drukker, executive director of econometrics no comments. This video looks at the combination of margins and marginsplot as a onetwo combination after ols. All stata commands that fit statistical models commands such as regress, logit, sureg, and so on work the same way.
What do you do after estimating your regression model. This distinction is often, but not universally made in the literature. Datasets for stata survival analysis reference manual, release 14. An introduction to survival analysis using stata, revised third edition is the ideal tutorial for professional data analysts who want to learn survival analysis for the first time or who are well versed in survival analysis but are not as dexterous in using stata to analyze survival data. Stata has a number of commands used after estimating models. Alternatively, you can first establish an internet connection, and then, in statas command. Stata press, a division of statacorp llc, publishes books, manuals, and journals about stata and general statistics topics for professional researchers of all disciplines. Steve, i was able to create the roc curves using your advice about converting the pweights to fweights. After estimation, you can use stata s standard bayesian postestimation tools such as bayesgraph to check convergence.
Integral for mean survival time streg postestimation. In intervalcensored data, the time of failure is not exactly known. Most singleequation estimation commands have the syntax command varlist if in weight, options and most multipleequation estimation commands have the syntax command varlist varlist. An introduction to survival analysis using stata, revised. Posts tagged postestimation programming an estimation command in stata. Command description contrast contrasts and anovastyle joint tests of estimates estat ic akaikes and schwarzs bayesian information criteria aic and bic estat summarize summary statistics for the estimation sample. Coxs partial likelihood model the cox model is estimated using stcox to use these programs, you must stset the data first, as discussed in lesson 3 i discuss and illustrate streg and stcox in turn, using the cancer data set assumed to be stset already. Thus in the streg command these variables do not appear. A discussion of these commands was published in the stata technical bulletin. They are much more powerful than the prvalue, prtab, prgen, prchange, and praccum comamnds in spost9. Pdf a comprehensive set of postestimation measures to. The people who wrote the estimation procedures distinguish two classes of models, proportional hazard models and accelerated failure time aft models. Then follow the instructions you get on the screen. Is there a way to get the mean with margins and streg.
Note this data set is accessible through the internet. Graphs using stcrreg and stcurve statalist the stata forum. Command description contrast contrasts and anovastyle joint tests of estimates estat ic akaikes and schwarzs bayesian information. Subject and author index 547 subject and author index this is the subject and author index for the survival analysis and epidemiological tables reference manual. Question about streg statalist statalist the stata forum. There are several packages that you can install for stata 8, stata 9 and stata 10 we can no longer support stata 7. Click on a filename to download it to a local folder on your machine. Posthoc pairwise comparison of groups pairwise comparisons of groups is. Stata module for postestimation with finite mixture. Using the predict postestimation command in stata to create predicted values and residuals. This is the 28th post in the series programming an estimation command in stata. Survival analysis reference manual, release 16 stata bookstore. Longitudinaldatapaneldata reference manual stata press. You can perform, for example, a weibull regression specifying the time.
The postestimation commands available after mi estimate do not inlcude the tests i am looking for, which are included in xtabond2. The postestimation stcurve command makes curves based on the estimated parameters, and these curves are too nice compared to empirical curves. This document briefly summarizes stata commands useful in econ4570. Generate, graph, list, and test the survivor and cumulative hazard functions.
You will start right away with indicating covariates and with options that define and. Stata s new stintreg command joins streg for fitting parametric survival models. I do not understand exactly what else do you mean by giving an example. Alternatively, you can first establish an internet connection, and then, in stata s command window, type. Again, i know this is more a statistical consulting question than a stata question, and for that i am sorry. Teaching\ stata \ stata version 14\ stata for analysis of variance. This module should be installed from within stata by typing ssc install evalue. Learn the basics of the test and testparm commands. For more such commands, see the nice r regress postestimation section of the. Datasets for stata survival analysis and epidemiological. However, the estimation need not take place in the loghazard metric. The output from a postestimation command may vary after say regress or logistic and some commands or commands options may not be available for all estimation commands. Integral for mean survival time streg postestimation 27 apr 2015. Datasets for stata survival analysis and epidemiological tables.
Finally, if you are interested in delving into stata graphics, besides the excellent manual, id suggest 2 great books. Alternatively, you can download it from the course website. Datasets for stata survival analysis and epidemiological tables reference manual, release. This feature works with every estimation command, so we could just as well have done it with, say, stcox or logit. I have a panel of countries with several variables, with only one of these variables being determined by multiple imputation.
Stata press 4905 lakeway drive college station, tx 77845, usa 979. The easiest way to use the preceding four options is, for example. Description streg performs maximum likelihood estimation for parametric regression survivaltime models. The articles appearing in the stata journal may be copied or reproduced as printed copies, in whole or in part, as long as any copy or reproduction includes attribution to both 1 the author and 2 the stata journal. Description stcurve plot the survivor, hazard, and cumulative hazard functions. Adjusting streg postestimation for bias 12 jun 2015, 08. Most singleequation estimation commands have the syntax command varlist if in weight, options and most multipleequation estimation commands have the. The first of these terms should of course be significant, but the second should not be except if we have omitted variables in the model. All you need to do is run two predict commands, one with no time option for rmst, and another with the current time of. Postestimation commands for the analysis of residuals and regression diagnostics are documented here. Below you will find a list of the most common general. Is it possible in stata to estimate the bias and create a.