summary.coxph {survival} R Documentation

## Summary method for Cox models

### Description

Produces a summary of a fitted coxph model

### Usage

## S3 method for class 'coxph'
summary(object, conf.int=0.95, scale=1,...)


### Arguments

 object the result of a coxph fit conf.int level for computation of the confidence intervals. If set to FALSE no confidence intervals are printed scale vector of scale factors for the coefficients, defaults to 1. The printed coefficients, se, and confidence intervals will be associated with one scale unit. ... for future methods

### Value

An object of class summary.coxph, with components:

 n, nevent number of observations and number of events, respectively, in the fit loglik the log partial likelihood at the initial and final values coefficients a matrix with one row for each coefficient, and columns containing the coefficient, the hazard ratio exp(coef), standard error, Wald statistic, and P value. conf.int a matrix with one row for each coefficient, containing the confidence limits for exp(coef) logtest, sctest, waldtest the overall likelihood ratio, score, and Wald test statistics for the model concordance the concordance statistic and its standard error used.robust whether an asymptotic or robust variance was used rsq an approximate R^2 based on Nagelkirke (Biometrika 1991). fail a message, if the underlying coxph call failed call a copy of the call na.action information on missing values

### Note

The pseudo r-squared of Nagelkirke is attractive because it is simple, but further work has shown that it has poor properties and it is now deprecated. The value is no longer printed by default, and will eventually be removed from the object.

coxph, print.coxph
fit <- coxph(Surv(time, status) ~ age + sex, lung)