Produces a summary of a fitted coxph model

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

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 Nagelkerke (Biometrika 1991).

- fail
a message, if the underlying coxph call failed

- call
a copy of the call

- na.action
information on missing values

- 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

`coxph`

, `print.coxph`

```
fit <- coxph(Surv(time, status) ~ age + sex, lung)
summary(fit)
```

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