PHRegResults.predict()

statsmodels.duration.hazard_regression.PHRegResults.predict

PHRegResults.predict(endog=None, exog=None, strata=None, offset=None, transform=True, pred_type='lhr') [source]

Returns predicted values from the proportional hazards regression model.

Parameters:

params : array-like The proportional hazards model parameters. exog : array-like Data to use as exog in forming predictions. If not provided, the exog values from the model used to fit the data are used. endog : array-like Duration (time) values at which the predictions are made. Only used if pred_type is either ‘cumhaz’ or ‘surv’. If using model exog, defaults to model endog (time), but may be provided explicitly to make predictions at alternative times. strata : array-like A vector of stratum values used to form the predictions. Not used (may be ‘None’) if pred_type is ‘lhr’ or ‘hr’. If exog is None, the model stratum values are used. If exog is not None and pred_type is ‘surv’ or ‘cumhaz’, stratum values must be provided (unless there is only one stratum). offset : array-like Offset values used to create the predicted values. pred_type : string If ‘lhr’, returns log hazard ratios, if ‘hr’ returns hazard ratios, if ‘surv’ returns the survival function, if ‘cumhaz’ returns the cumulative hazard function.

Returns:

A bunch containing two fields: predicted_values and standard_errors.

Notes

Standard errors are only returned when predicting the log hazard ratio (pred_type is ‘lhr’).

Types surv and cumhaz require estimation of the cumulative hazard function.