Pointwise confidence intervals for the covariate-adjusted survivor function in the Cox model

Matthew Cefalu ()
Additional contact information
Matthew Cefalu: Texas A&M University

Stata Journal, 2011, vol. 11, issue 1, 64-81

Abstract: A graphical representation of the pointwise confidence intervals allows a researcher to easily assess the precision of estimators. In the absence of covariates, the official command sts graph can be used to plot these intervals for the survivor function or the cumulative hazard function; however, in the presence of covariates, sts graph is insufficient. The user-written command survci can be used to plot the pointwise intervals for the survivor function after the Cox model. In this article, I describe the current and new features of survci. The new features include pointwise confidence intervals for the cumulative hazard function and the support of stratified Cox models, as well as factor variables; available as of Stata 11. I describe the methods used in calculating pointwise confidence intervals in the Cox model for both the covariate-adjusted survivor function and the covariate-adjusted cumulative hazard function. I also demonstrate the syntax of survci using Stata’s example cancer dataset, cancer.dta. Copyright 2011 by StataCorp LP.

Keywords: survci; confidence intervals; covariate adjusted survivor function; Cox model (search for similar items in EconPapers)
Date: 2011
Note: to access software from within Stata, net describe http://www.stata-journal.com/software/sj11-1/st0217/
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
http://www.stata-journal.com/article.html?article=st0217 link to article purchase

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:tsj:stataj:v:11:y:2011:i:1:p:64-81

Ordering information: This journal article can be ordered from
http://www.stata-journal.com/subscription.html

Access Statistics for this article

Stata Journal is currently edited by Nicholas J. Cox and Stephen P. Jenkins

More articles in Stata Journal from StataCorp LLC
Bibliographic data for series maintained by Christopher F. Baum () and Lisa Gilmore ().