coxph.object {survival} | R Documentation |

## Proportional Hazards Regression Object

### Description

This class of objects is returned by the `coxph`

class of functions
to represent a fitted proportional hazards model.
Objects of this class have methods for the functions `print`

,
`summary`

, `residuals`

, `predict`

and `survfit`

.

### Arguments

`coefficients` |
the vector of coefficients. If the model is over-determined there will be missing values in the vector corresponding to the redundant columns in the model matrix. |

`var` |
the variance matrix of the coefficients. Rows and columns corresponding to any missing coefficients are set to zero. |

`naive.var` |
this component will be present only if the |

`loglik` |
a vector of length 2 containing the log-likelihood with the initial values and with the final values of the coefficients. |

`score` |
value of the efficient score test, at the initial value of the coefficients. |

`rscore` |
the robust log-rank statistic, if a robust variance was requested. |

`wald.test` |
the Wald test of whether the final coefficients differ from the initial values. |

`iter` |
number of iterations used. |

`linear.predictors` |
the vector of linear predictors, one per subject. Note that this
vector has been centered, see |

`residuals` |
the martingale residuals. |

`means` |
vector of values used as the reference for each covariate.
For instance, a later call to |

`n` |
the number of observations used in the fit. |

`nevent` |
the number of events (usually deaths) used in the fit. |

`concordance` |
a vector of length 6, containing the number of pairs that are concordant, discordant, tied on x, tied on y, and tied on both, followed by the standard error of the concordance statistic. |

`first` |
the first derivative vector at the solution. |

`weights` |
the vector of case weights, if one was used. |

`method` |
the method used for handling tied survival times. |

`na.action` |
the na.action attribute, if any, that was returned by the |

`timefix` |
the value of the timefix option used in the fit |

`...` |
The object will also contain the following, for documentation see the |

### Components

The following components must be included in a legitimate `coxph`

object.

### See Also

`coxph`

, `coxph.detail`

, `cox.zph`

, `residuals.coxph`

, `survfit`

, `survreg`

.

*survival*version 3.6-4 Index]